Tools & Calculators
A catalog of trade calculators for field checks, shop math, and planning estimates. Search by work, material, standard, or category.
HVAC
20 live toolsSizing and diagnostic checks for heating and cooling: heat load from utility bills, mini-split efficiency, superheat and subcooling.
Showing HVAC tools. 20 shown.
Tools in HVAC
Shops & Outbuildings
87 toolsOutbuildings
22 toolsCMU Block Estimator
Estimate CMU block count, mortar, grout, and rebar for concrete masonry walls.
Compressed Gas Cylinder Duration Calculator
Calculate how long a compressed gas cylinder will last at a given flow rate. Covers standard sizes (R, K, T, S), common gases, and multi-cylinder job planning.
Concrete Slab Heat Loss Calculator
Calculate heat loss through concrete slab-on-grade floors. Uses edge loss and full-slab methods with perimeter F-factors, insulation R-values, and heating degree days to estimate annual cost and insulation payback.
Deck Board & Fastener Calculator
Calculate deck board count, fasteners, and joist requirements for three layout orientations.
Flooring Calculator
Estimate flooring material for carpet, LVP, laminate, engineered hardwood, carpet tile, and sheet vinyl. Includes seam planning for carpet rolls, plank direction waste, stagger guidance, and stair material.
Garage Door Opener Sizing Calculator
Recommend garage door opener horsepower, drive type, and features based on door size, weight, and material. Includes door weight estimation, usage frequency sizing, and spring balance check reminder.
Generator Backfeed Safety Checker
Check if your generator setup is safe from backfeed risk. This decision-tree tool evaluates your transfer switch, connection method, and safety equipment against NEC Article 702 requirements and flags dangerous configurations.
Grout & Thinset Calculator
Calculate thinset mortar and grout quantities from tile size, joint width, and trowel notch size. Auto-recommends trowel size per TCNA guidelines, accounts for back-buttering large format tiles, and selects sanded vs unsanded grout.
Gutter & Downspout Capacity Check
Check if your existing gutters and downspouts can handle the rainfall load. Uses IPC rainfall intensity methods with NOAA Atlas 14 data. Returns ADEQUATE, MARGINAL, or UNDERSIZED verdict with downspout count recommendation.
Livestock Barn Ventilation Calculator
Calculate ventilation rates for livestock barns by animal type and season. Covers dairy, beef, swine, and poultry with CFM per head, fan sizing at actual static pressure, and multi-stage ventilation planning from winter minimum to summer tunnel mode.
Long-Run Voltage Drop Calculator
Calculate voltage drop for long wire runs to detached shops, barns, garages, and outbuildings. Compares copper vs aluminum, shows motor starting voltage impact, and recommends the right wire size for your distance and load.
Machine Shop Power Budget Calculator
Calculate total connected load and demand for your machine shop. Enter lathes, mills, welders, grinders, plasma tables, and compressors to determine service size, panel capacity, and whether you need single-phase or three-phase power.
Overhead Door Infiltration Loss Calculator
Calculate heat loss through overhead doors in shops, garages, and warehouses. Compares open-door vs closed-door losses, seal condition impact, and annual cost of infiltration with payback on door seals and high-speed doors.
Pole Barn Snow Load Calculator
Calculate roof snow loads for pole barns, post-frame buildings, and metal buildings using ASCE 7 methods. Accounts for ground snow load, exposure, thermal factor, roof slope reduction, and leeward drift loads.
Rafter Length Calculator
Calculate common, hip, and valley rafter lengths with bird's mouth cuts and roof area.
Roof Drainage & Gutter Sizing Calculator
Size gutters and downspouts based on roof area, pitch, and rainfall intensity. Calculate required gutter size, downspout count, and maximum run length per IPC/UPC methods.
Roofing Material Estimator
Estimate roofing material quantities for shingles and metal panels with slope factor and waste.
Shop Air Compressor Sizing Calculator
Size your shop air compressor based on actual tool usage. Enter your air tools, duty cycles, and simultaneous usage to get required CFM, tank size, and compressor type recommendation. Compares reciprocating vs rotary screw options.
Shop Heater BTU Sizing Calculator
Calculate the exact BTU output your shop or garage heater needs. Factors in wall R-values, ceiling insulation, slab edge loss, overhead door infiltration, and air changes per hour to size propane, natural gas, and electric heaters correctly.
Siding Material Estimator
Estimate siding quantities plus all accessories: J-channel, corner posts, starter strip, undersill trim, and housewrap. Supports vinyl, fiber cement, wood clapboard, board and batten, engineered wood, and metal panel.
Wallpaper Calculator
Calculate wallpaper rolls needed with pattern repeat waste, accent wall mode, and peel-and-stick support. Accounts for dye lot safety margin, window and door deductions, and inside corner waste.
Well Pump Electrical & Sizing Calculator
Size your well pump system including total dynamic head, wire gauge for the pump run, breaker sizing per NEC 430, and pressure tank selection. Calculates annual energy cost and shows wire schedule for deep well installations.
Machining & Welding
10 toolsAWS Welding Electrode Decoder
Decode any AWS filler-metal classification: stick electrodes (E6010, E7018, E8018-B2), flux cored wire (E71T-1, E70T-4), solid wire (ER70S-6), and stainless (E308L-16, ER316L). Reads each digit and letter for tensile strength, welding position, current and polarity, coating type, and low-hydrogen status, with the storage and base-metal field notes the chart leaves out. Source-cited to AWS A5.1, A5.4, A5.5, A5.9, A5.18, and A5.20.
Bolt Grade Marking Decoder
Decode the lines and numbers on a bolt head. Reads SAE inch grades by radial-line count (Grade 2, 5, 8), metric property classes (8.8, 10.9, 12.9), ASTM structural grades (A307, A325, A490 under F3125), and stainless classes (A2-70, A4-80) into proof load, yield, and tensile strength, with the cross-system equivalents and the field cautions the chart leaves out. Source-cited to SAE J429, ISO 898-1, ISO 3506-1, and ASTM F3125.
Bolt Torque Calculator
Calculate recommended torque values for bolts by size, grade, and lubrication. Covers SAE Grade 2/5/8, ASTM A325/A490, and Metric 8.8/10.9/12.9 with adjustable clamp load percentage and quick reference table.
Drill & Tap Calculator
Two-in-one drill and tap calculator. Get drilling RPM and feed rates for any drill size, plus tap drill sizes with thread percentage for UNC, UNF, and Metric threads. Includes comprehensive thread data tables.
Fillet Weld Strength Calculator
Check fillet weld adequacy per AWS D1.1 structural welding code. Enter weld size, length, electrode class, and applied load to verify utilization ratio, minimum/maximum weld sizes, and safety margin.
Lathe Turning Calculator
Calculate RPM, feed rate, cutting time, and surface finish for lathe turning operations. Supports OD turning, facing, boring, and parting with material-specific SFM data and horsepower estimation.
MIG/TIG Gas Consumption Estimator
Estimate shielding gas consumption for MIG and TIG welding. Calculate cylinder life, cost per shift, and bulk vs cylinder savings based on flow rate, arc-on time, and pre/post flow waste.
Metal Removal Rate Calculator
Calculate metal removal rate, machining time, and horsepower requirements for milling, turning, and drilling. Estimate job time and machine utilization with material-specific cutting energy data.
Speeds & Feeds Calculator
Calculate optimal RPM and feed rate for milling and drilling operations. Select material and tool diameter to get recommended cutting speeds, chip load, and material removal rate with risk tier classification.
Weld Heat Input Calculator
Calculate weld heat input per AWS D1.1 and ASME Section IX. Enter amperage, voltage, and travel speed to get kJ/in and kJ/mm with process efficiency correction and risk tier classification by material type.
Bearings
9 toolsBasic L10 Bearing Life Calculator
Calculate L10 bearing life in hours and years from dynamic load rating C and equivalent load P. Includes reliability-adjusted L10a for 95% and 99% confidence levels.
Bearing Failure Symptom Triage
Diagnose bearing problems from observed symptoms, noise, vibration data, and visual inspection. Rule-based diagnostic tool that identifies likely causes and recommends corrective actions.
Bearing Grease Speed Factor Guide
Check grease suitability for bearing speed and temperature. Get regreasing interval estimates based on ndm speed factor, NLGI grade, base oil viscosity, and operating environment.
Bearing Part Number Decoder
Decode SKF, FAG, Timken, NSK, NTN, and Koyo bearing designations. Boundary dimensions per ISO 15, clearance microns per ISO 5753-1, cross-vendor equivalents, source-cited per maker catalog. Prefills the six ToolGrit bearing calculators.
Bearing Puller Force Estimator
Rule-of-thumb estimator for bearing removal and installation press force. Enter bearing size, fit tightness, and engagement length to get force estimate with tool recommendations.
Bearing Speed Limit Checker
Check bearing speed against conservative ndm limits by bearing type and lubrication method. Get OK/CAUTION/HIGH risk classification with maximum safe RPM for your configuration.
Equivalent Dynamic Load Calculator
Calculate equivalent dynamic bearing load P from radial and axial forces. Supports deep groove, angular contact, cylindrical roller, self-aligning, and spherical roller bearings with correct X and Y factors.
Press Fit / Clearance Checker
Verify shaft-to-bore fit against ISO/ANSI tolerance classes. Enter measured shaft and bore diameters to check interference, clearance, and assembly method recommendations.
Thermal Growth Fit Impact Calculator
Calculate thermal expansion of shafts and housings and see the impact on bearing fit. Enter material, dimensions, and temperature change to see dimensional growth and resulting hot-running fit.
Plant Maintenance
24 toolsBelt Drive & Sheave Calculator
Calculate belt drive speed ratios, sheave diameters, belt speed in FPM, and approximate belt length. Includes V-belt cross-section reference with minimum sheave diameters.
Bolt Torque-Tension Calculator
Calculate bolt preload from applied torque using K-factor method. Covers lubricated, dry, and anti-seize conditions.
Center of Gravity & Unbalanced Lift Calculator
Calculate center of gravity for unbalanced loads and determine sling leg length ratio for a level lift.
Coupling Alignment Calculator
Look up offset and angularity tolerances by coupling type. Covers jaw, gear, disc, grid, and elastomeric couplings.
Crane & Rigging Calculator
Calculate sling tension, angle factors, and working load limits for multi-leg rigging configurations.
Flange Bolt Pattern & P-T Reference
ASME B16.5 flange reference: bolt count, diameter, bolt circle, and torque by pipe size and pressure class, plus pressure-temperature ratings (carbon steel Group 1.1) that derate with service temperature, RF / FF / RTJ face types, and RTJ ring numbers. Class is not PSI: see the working pressure at your actual temperature.
Heat Exchanger Duty Calculator
Calculate heat exchanger duty (Q), LMTD, and required UA value. Supports counterflow and parallel flow with water and glycol fluids.
IEC Motor Frame Decoder
Decode IEC motor frames to shaft-height and NEMA cross-reference cues, with warnings for standards, drawings, and fit review.
Lubricant Grade Decoder
Cross-reference lubricant grades across ISO VG, AGMA, SAE engine, SAE gear, and NLGI. Type any one grade and get the approximate equivalents on the other scales, the kinematic viscosity at 40 C, and the field-truth warning that engine and gear SAE numbers are different scales (SAE 90 gear is about an SAE 50 engine oil). NLGI grease consistency is reported on its own axis with ASTM D217 penetration ranges.
Lubrication Interval Calculator
Calculate bearing regreasing intervals using SKF method. Accounts for speed, temperature, contamination, and bearing type.
Material Hardness Converter
Convert between Rockwell C (HRC), Rockwell B (HRB), Brinell (HB), Vickers (HV), and approximate tensile strength using ASTM E140 conversion data.
Motor Efficiency & Loading Calculator
Assess motor loading percentage, efficiency at actual load, and annual energy savings from right-sizing or upgrading.
Motor Nameplate Decoder
Screen common electric motor nameplate fields with source-boundary prompts for FLA, frame, conductor-row, service-factor, efficiency, NEMA/manufacturer, NEC/AHJ, and safe-work review.
Motor Slip & RPM Calculator
Screen motor slip percentage, synchronous speed, and actual RPM from nameplate or measured data. Includes local NEMA design review prompts and RPM vs load cues, not a design-letter determination.
Multi-Leg Sling Tension Calculator
Calculate sling leg tension for multi-leg rigging configurations with ASME B30.9 WLL reductions.
PM Interval Optimizer
Optimize preventive maintenance frequency using Weibull reliability analysis and cost-risk modeling. Find the interval that minimizes total maintenance cost.
Pipe Pressure Drop Calculator
Calculate pressure drop in pipes using Darcy-Weisbach equation with Swamee-Jain friction factor. Supports steel, copper, PVC, and stainless pipe with fitting equivalent lengths.
Pipe Schedule Quick Reference
Searchable pipe dimension reference table for NPS 1/2" through 12". Schedule 10, 40, 80, and 160 with OD, wall, ID, flow area, and weight per foot.
Pump Affinity Laws Calculator
Calculate the effect of speed changes or impeller trim on pump flow, head, and power using the affinity laws. Includes energy cost savings for VFD applications.
Relief Valve Sizing Calculator
Size pressure relief valves per API 520. Calculate required orifice area for gas, steam, and liquid service.
Sheave & Belt Field Calculator
Field-first sheave and belt sizing for working mechanics. Identifies belt section from top width, decodes part-number patterns, infers what changed in the system, runs affinity-law reality checks on pumps and fans, and tells you what to measure next when uncertain.
Spare Parts Reorder Calculator
Calculate reorder points, safety stock, and economic order quantities for MRO spare parts. Uses Poisson distribution for slow-moving items and normal distribution for fast-movers.
Spreader Bar & Lifting Beam Sizing Calculator
Size spreader bars and lifting beams for overhead lifts with Euler buckling and section modulus checks.
Vibration Severity Checker
Assess machine vibration severity per ISO 10816. Enter velocity readings and get zone classification with maintenance recommendations.
Instrumentation
18 tools4-20 mA Signal Helper
Convert between 4-20 mA signals and process values. Build scaling tables, check for loop faults, and verify transmitter calibration.
Control Valve Cv / Flow Estimator
Calculate required valve Cv for liquid, gas, and steam service. Detect choked flow conditions and estimate valve size from standard Cv tables.
Fisher Control Valve Decoder
Decode Fisher easy-e ED/ET/ES/EZ valve bodies, 657/667 actuators, DVC6200 FIELDVUE positioners, and 627 Series regulators against the current Emerson bulletins. Source-cited fact groups, derived fail action that joins body and actuator, kind-aware hint routing, decimal/fraction travel reconciliation, PDF and CSV export.
I/P Converter Sanity Checker
Verify I/P converter output against expected values. Check mA input vs PSI output, diagnose drift, and flag high-deviation converters.
IP Rating Decoder (IEC 60529)
Preliminary IEC 60529 IP lookup for IP66, IP67, IPX9K, and IP69K with digit context, K-suffix source notes, and one-way NEMA warnings.
Instrument Air Cost & Leak Impact
Calculate the cost of compressed air leaks and their impact on instrument air reliability. Prioritize leak repairs by annual savings and reliability risk.
Instrument Air Line Sizing Calculator
Size instrument air tubing and piping using Harris formula. Compare copper, black iron, and stainless options with pressure drop and velocity checks.
NEMA Enclosure Rating Decoder
Preliminary NEMA Type lookup for 4X, 12, 3R, 7, 6P, and related enclosure markings. Shows local protection prompts, hazloc context, source limits, installed-assembly cautions, and one-way IP cross-reference warnings. Not product certification or AHJ approval.
PID Loop Quick Visualizer
Simulate PID controller step response with adjustable tuning parameters. Visualize overshoot, settling time, and stability with real-time Canvas-based charts.
Pneumatic Cylinder Force Calculator
Calculate extend and retract force for pneumatic cylinders. Includes practical force with friction factor, differential area, and air consumption in SCFM.
Pneumatic Troubleshooter Assistant
Match observed pneumatic valve and actuator symptoms to local review prompts while manufacturer, instrument-air, safety, and qualified-review gaps stay visible.
Rosemount 2051 Pressure Transmitter Decoder
Decode supported Rosemount 2051C/T/G codes with PDS page citations plus order, certification, configuration, WirelessHART, and qualified-review warnings.
Rosemount 3051 Decoder
Decode supported Rosemount 3051SAL/3051C codes with PDS page citations plus order, certification, configuration, seal, and safety warnings.
Rosemount 3144P Temperature Transmitter Decoder
Decode Rosemount 3144P Rev TH rows with X-well, sensor setup, certification, SIS, configuration, Fieldbus, and install-review warnings.
Rosemount 644 Temperature Transmitter Decoder
Decode Rosemount 644 Rev WH and rail Rev AA rows with sensor, certification, SIS, Fieldbus, configuration, and install-review warnings.
Rosemount 848T Multi-Input Temperature Decoder
Decode Rosemount 848T Rev SD rows with channel-map, certification, S002, Fieldbus, WirelessHART, configuration, and install warnings.
Valve Actuator Sizing Check
Verify actuator torque or thrust against valve requirements. Covers butterfly, ball, globe, and plug valves with safety factor and fail-safe spring check.
Valve Stroke Time Calculator
Calculate pneumatic valve stroke time from actuator volume, supply pressure, and system Cv. Identifies undersized tubing and slow-stroking valves.
Pipefitting
4 toolsASTM Pipe Spec Decoder
Decode ASTM pipe specifications: A106 (high-temperature seamless carbon), A53 (general carbon, welded or seamless), A312 (austenitic stainless), A333 (low-temperature impact-tested), A335 (chrome-moly for creep service), and A790 (duplex). Returns the service intent, manufacturing method, chemistry, and mechanicals, and flags the A106-vs-A53, low-temperature, and P91 post-weld heat treatment distinctions that bite on procurement.
Pipe Miter Cut Template Generator
Generate printable wrap-around templates for pipe miter cuts. Enter pipe OD, wall thickness, and miter angle to get a full-size cutting template.
Pipe Rolling Offset Calculator
Calculate pipe rolling offset travel length for any fitting angle. Enter set and roll to get travel, advance, and cut length. 45, 22.5, 30, and 60 degree support.
Pipe Spool Take-Out Calculator
Calculate exact pipe cut lengths by subtracting fitting take-out dimensions. Supports 90, 45, tee, and weld fittings with gap allowance.
Industrial
44 toolsAISC 360 Steel Column Capacity Calculator
Check axial compression capacity per AISC 360 Chapter E with elastic/inelastic buckling, W-shape and HSS sections, and utilization ratio. LRFD method.
ASME B31.3 Pipe Wall Thickness Calculator
Calculate minimum pipe wall thickness per ASME B31.3 Section 304.1.2 with mill tolerance, corrosion allowance, and schedule comparison. Supports 6 materials and 18 NPS sizes.
Air Compressor Leak Calculator
Find out how much compressed air leaks cost your facility per year. Enter leak count, system pressure, and electricity rate to see CFM losses, kW waste, and annual dollars wasted.
Allen-Bradley I/O Decoder
Decode an Allen-Bradley catalog number (1756-IB16, 1769-IQ16, 1734-OB8E, 1756-EN2T) into bulletin/family, module type, point or channel count, signal class, and feature suffix from Rockwell selection guides. Shows the point/channel count and voltage only where a cited Rockwell row backs it, decodes the structure where it does not, and flags an unknown bulletin, impossible count, or illegal suffix instead of guessing. Identification only, not a compatibility verdict.
Anchor Bolt Pull-Out Calculator
Calculate anchor bolt capacity per ACI 318 Chapter 17 with tension and shear breakout checks.
Asphalt Tonnage Calculator
Calculate tons of hot mix asphalt from paving area, lift thickness, and mix density. Includes waste factor, truck load planning, and cost estimation.
Beam Deflection & Load Calculator
Calculate beam deflection, bending stress, and shear for simple spans and cantilevers with W-shape lookup.
Cathodic Protection Anode Sizing Calculator
Size sacrificial anode and impressed current cathodic protection systems for buried pipelines, storage tanks, and reinforced concrete structures.
Compressed Air System Sizing & Cost Calculator
Size your shop air compressor based on real tool CFM demand with duty cycles. Get HP recommendations, pipe sizing, receiver tank sizing, and true 5-year operating cost comparison.
Concrete Mix Design Calculator
ACI 211.1 concrete mix design step by step. Enter target strength, exposure class, and aggregate properties to get w/c ratio, mix proportions per cubic yard, and batch weights.
Concrete Rebar Spacing Calculator
Calculate rebar count, spacing, lap splice length, and development length per ACI 318. Supports #3 through #11 bars with clear cover requirements.
Concrete Volume Calculator
Calculate how many cubic yards of concrete to order. Accounts for overdig, pour-specific waste factors, and short load fees. Supports slabs, footings, walls, columns, and steps.
Conveyor Belt Calculator
Size belt conveyors for bulk material handling. Belt speed, width, capacity, effective tension, and motor horsepower per CEMA standards.
Cut & Fill / Earthwork Calculator
Calculate cut and fill volumes for grading projects using simple pad or grid methods. Accounts for swell and shrink by soil type, shows bank/loose/compacted volumes, topsoil stripping, truck loads, and a color-coded grid visualization.
Excavator Production Rate Calculator
Calculate excavator production rate in cubic yards per hour with truck fleet sizing.
Fan Laws Calculator
Apply AMCA 201 fan affinity laws to predict flow, pressure, and power changes from speed or system resistance changes. Includes system curve estimate and VFD energy savings analysis.
Fixture Unit Calculator
Calculate water supply fixture units (WSFU) per IPC/UPC and convert to peak GPM demand using Hunter's Curve. Determine minimum pipe size for water supply systems.
Gas Pipe Sizing Calculator
Size natural gas piping per IFGC/IRC using the Spitzglass formula. Select appliances, pipe material, and run length to find minimum pipe diameter.
Gear Ratio & Torque Calculator
Calculate compound gear train ratios, output speed, torque multiplication, and power loss.
Horizontal Tank Volume Calculator
Calculate liquid volume in horizontal cylindrical tanks from fluid depth (dipstick reading). Supports flat, ellipsoidal, and hemispherical heads. Gallon and liter output.
Hydraulic Accumulator Sizing Calculator
Size bladder, piston, and diaphragm accumulators with isothermal and adiabatic comparison.
Hydraulic Cylinder Force & Speed Calculator
Calculate hydraulic cylinder extend and retract force, speed, GPM requirements, and Euler rod buckling safety factor for any bore, rod, pressure, and flow combination.
Hydraulic Heat & Cooler Sizing Calculator
Calculate heat generation from hydraulic power loss and size oil coolers to maintain target temperature.
IR Emissivity Reference
Searchable emissivity lookup for 48+ materials with surface condition variants. Set your IR camera or pyrometer correctly for accurate temperature readings.
Mechanical Insulation Thickness Calculator
ASTM C680 method for pipe and equipment insulation. Calculate thickness, heat loss BTU/hr, surface temperature, and condensation risk for various insulation types.
NPSH Available Calculator
Calculate Net Positive Suction Head Available to prevent pump cavitation.
Parker Hydraulic Hose Decoder
Decode a Parker Catalog 4400 hose part number (387-8, 471TC-6, 302-16, 797-16) into hose ID, OD, the working pressure for that exact size, minimum bend radius, construction, cover, and the matching fitting series. Legacy hose pressure drops with size, so the lookup is per (series, dash).
Pipe Anchor Force Calculator
Calculate thermal expansion forces on pipe anchors for carbon steel, stainless, copper, and more.
Pipe Heat Trace Calculator
Calculate heat loss per foot from pipe geometry and insulation, determine watts per foot required, total wattage, and breaker sizing for self-regulating or constant-watt heat trace cable.
Pipe Thermal Expansion Calculator
Calculate thermal expansion in pipes and size expansion loops or offsets. For steam, hot water, and process piping. Supports carbon steel, stainless, and copper.
Pipe Thread Sealant Guide
Select the correct pipe thread sealant based on thread type, pipe material, fluid service, pressure, and temperature. Covers Teflon tape, pipe dope, anaerobic compounds, and PTFE paste.
Plumbing DWV Sizing Calculator
Size drain, waste, and vent pipes based on fixture unit loading per IPC or UPC methodology. Calculate branch drains, building drains by slope, vent stacks, wet vents, trap verification, and cleanout schedules.
Pool Volume & Chemical Dosing Calculator
Calculate pool water volume for any shape and get chemical dosing recommendations for chlorine, pH, alkalinity, CYA, calcium hardness, and salt. Supports SWG pools, breakpoint chlorination, and partial drain calculations.
Roller Chain Selection Calculator
Select ANSI roller chain size based on horsepower, speed, and sprocket teeth. Service factor adjustment with chain pitch and strand recommendations.
Septic Tank & Drain Field Sizing Calculator
Size septic systems including tank capacity, drain field absorption area, and pump chamber based on bedroom count, daily flow, and soil percolation rate. Covers conventional, pressure, mound, and ATU systems with setback checks.
Shaft & Keyway Calculator
Size keys and keyways for shafts transmitting torque. Shear and compressive stress checks per ASME B17.1 with standard key size lookup.
Soil Bearing Capacity Estimator
Estimate presumptive soil bearing capacity per IBC Table 1806.2 and size spread footings.
Stair Stringer Calculator
Calculate riser height, tread depth, stringer length, and layout dimensions per IRC R311.7 code requirements. Includes stringer cut diagram and material list.
Steam Properties Calculator
Look up saturated and superheated steam properties. Temperature, pressure, specific volume, enthalpy, entropy for water and steam. IAPWS-IF97 polynomial approximations.
Storm Drain Pipe Sizing Calculator
Size storm drain pipes using the Rational Method (Q=CiA) and Manning's equation. Calculate required pipe diameter, flow velocity, and pipe capacity for stormwater drainage.
Swagelok Tube-Fitting Decoder
Decode a Swagelok tube-fitting part number (SS-400-1-4, B-400-1-4, SS-810-1-8, SS-400-6) into material, tube OD, fitting configuration, and end connection from the MS-01-140 ordering grammar. Reads the tube size from the published size-code table (the 810/1210/1610 series-digit quirk) instead of arithmetic, and flags any unknown code instead of guessing. Reports geometry only. No pressure, temperature, compatibility, or service-suitability claims.
System Chain Analyzer
Whole-chain industrial triage. Walk a machine from electrical supply through motor, transmission, and driven equipment in one tool. Surfaces which chain link is the problem, runs NEC and affinity-law reality checks, infers what probably changed, and links out to the dedicated single-purpose ToolGrit calculators for any link that needs deeper analysis.
Trades Unit Converter
Purpose-built unit converter for trades and industrial workers. Convert pressure, flow, temperature, torque, length, water chemistry, and electrical units including niche conversions like inWC to PSI and grains/gallon to ppm.
Wire Rope Working Load Limit Calculator
Calculate working load limit for wire rope slings based on rope diameter, grade, construction, and hitch type. Design factor and D/d ratio checks included.
Safety
37 toolsActivity-to-Dose Calculator
Convert source activity (Curies or Becquerels) to dose rate at any distance using the specific gamma ray constant. Includes gamma constant reference table for common industrial isotopes.
Air Change Rate Calculator
Calculate air changes per hour and verify ventilation adequacy for any occupancy type.
Arc Flash Incident Energy Calculator
Calculate incident energy, arcing current, PPE category, and arc flash boundary per IEEE 1584-2018. Supports all five electrode configurations with enclosure correction and reduced arcing current analysis.
Arc Flash PPE Category (Table Method)
Look up arc flash PPE category directly from NFPA 70E Table 130.7(C)(15)(a) for AC and (b) for DC systems. No incident energy calculation needed for routine tasks within table limits.
Chemical Exposure Limits Lookup
Look up OSHA PEL, NIOSH REL, and ACGIH TLV exposure limits for common industrial chemicals. TWA, STEL, and ceiling values with hazard notes.
Combustible Dust Reference
NFPA 660 combustible dust hazard reference. Kst and Pmax values for 100+ materials, dust explosion pentagon, housekeeping triggers, and DHA requirements.
Confined Space Ventilation Calculator
Size forced-air ventilation for permit-required confined spaces per OSHA 1910.146. Air changes per hour, duct velocity, and blower CFM for safe entry.
Energized Work Permit Template
Build a printable energized electrical work permit template with shock, arc flash, justification, checklist, and approval fields plus qualified-review warnings.
Fall Protection Clearance Calculator
Calculate total fall clearance distance for personal fall arrest systems. Lanyard length, deceleration distance, D-ring shift, harness stretch, and safety margin per OSHA 1926.502.
Fire Extinguisher Spacing Calculator
Calculate fire extinguisher count and placement per OSHA 1910.157 and NFPA 10.
Fire Sprinkler Hydraulic Calculator
NFPA 13 sprinkler hydraulic calculator. Compute flow using K-factor, Hazen-Williams friction loss in piping, and total system demand at the riser with hose stream allowance.
Gas Cross-Sensitivity Calculator
Check how your catalytic bead or electrochemical sensor reads in the presence of interfering gases. Correction factors for 60+ gas and sensor combinations.
Gas Mixture Flammability Calculator
Calculate LEL/UEL for gas mixtures using Le Chatelier's rule with O2-adjusted limits and dilution analysis. 20 gases, preset scenarios, and safety warnings.
H2S Exposure Reference
Hydrogen sulfide exposure limits, health effects by concentration, detector alarm setpoints, and emergency response actions. OSHA PEL, NIOSH REL, and ACGIH TLV.
Heat Index & Work/Rest Schedule Calculator
Calculate heat index and OSHA heat stress work/rest schedule with water intake recommendations.
LEL/UEL Planning Lookup
Look up LEL and UEL values for 80+ gases and vapors. Enter detector reading to see where you sit in the flammable range with NFPA 497 references.
Ladder & Scaffold Inspection Checklist
Generate OSHA-compliant daily inspection checklists for ladders and scaffolds. Covers 1926.1053 ladder and 1926.451 scaffold requirements with printable output.
Lockout/Tagout Permit Manager
Create OSHA-compliant LOTO permits for equipment energy isolation. Track electrical, pneumatic, hydraulic, and thermal energy sources with lock assignments and zero-energy verification.
Multi-Gas Detector Guide
Source-aware gas-detector sensor review screen for selected hazards. Flags four-gas blind spots, supplemental sensor prompts, and OSHA/NIOSH/manufacturer source gaps; not a purchase specification.
NIOSH Lifting Equation Calculator
Calculate the NIOSH Recommended Weight Limit (RWL) and Lifting Index (LI) for manual lifting tasks. All six multiplier factors with risk assessment.
Noise Dose & TWA Calculator
Calculate noise dose and time-weighted average per OSHA 29 CFR 1910.95 with NIOSH comparison.
Oxygen Displacement Calculator
Calculate oxygen concentration after inert gas release in a confined space. Nitrogen, argon, CO2, and helium displacement with time-to-IDLH estimates.
Radiation Area Posting Guide
Determine radiation area posting requirements from dose rate at 30 cm. Identifies Radiation Area, High Radiation Area, and Very High Radiation Area classifications per 10 CFR 20.1003 and 20.1902.
Radiation Distance Calculator
Calculate dose rate at any distance from a radiation source using the inverse square law. Returns dose falloff table, 2 mR/hr boundary distance per 10 CFR 20.1301, and High Radiation Area boundary.
Radiation Shielding Calculator
Calculate dose rate reduction through lead, steel, concrete, or tungsten shielding using half-value layer (HVL) data. Includes HVL reference table for Cs-137, Ir-192, Co-60, Se-75, and Am-241.
Radiation Stay Time Calculator
Calculate maximum allowable time in a radiation field based on dose rate and applicable dose limit. ALARA planning tool with 10 CFR 20 dose limits, accumulated dose tracking, and comparison table.
Radioactive Decay Calculator
Calculate current source activity from original calibrated activity and elapsed time using the decay equation. Find when a source reaches a target activity for replacement or disposal planning.
Scaffold Load & Tie Calculator
OSHA 1926.451 scaffold loading calculator. Determine platform capacity, leg loads, mudsill sizing, and tie spacing for light, medium, and heavy-duty scaffolding.
Shift Fatigue Risk Estimator
Assess shift fatigue risk using Folkard-Lombardi scoring with checks against API RP 755, NRC, FMCSA, and EU Working Time standards. Includes BAC-equivalent impairment reference.
Shock Approach Boundary Calculator
Look up limited, restricted, and prohibited approach boundaries for shock protection per NFPA 70E Table 130.4(E)(a) for AC and (b) for DC. Visual boundary zone diagram included.
Spill Containment Volume Calculator
Calculate required secondary containment volume per EPA SPCC regulations with precipitation allowance.
Sprinkler Head Spacing & Coverage Calculator
Calculate fire sprinkler head count, spacing, and branch line sizing per NFPA 13 principles. Covers 6 hazard classifications, obstruction 3x rule, sidewall coverage limits, quick-response requirements, and dry pipe reduction factors.
Sprinkler Pipe Friction Calculator
Calculate friction loss in fire sprinkler piping using Hazen-Williams with fittings and velocity check.
Trench Shoring & Protective System Selector
OSHA 1926.652 decision-tree for trench protective systems by soil type and depth. Sloping, benching, shoring, and shielding options with tabulated data.
Trench Volume & OSHA Sloping Calculator
Calculate trench excavation volume and OSHA 1926.652 required slope angles by soil type.
Vapor Density Reference
Vapor density lookup for 90+ industrial gases and solvents. See which gases sink into trenches, pits, and basements vs which ones rise and dissipate.
Ventilation Dilution Calculator
Calculate required dilution ventilation airflow to keep contaminant concentrations below exposure limits. General ventilation for solvents, gases, and vapors.
Electrical
35 toolsABB ACS Drive Type-Code Decoder
Decode an ABB ACS drive type designation (ACS180, ACS355, ACS380, ACS480, ACS580, ACS880) into output current I2N, max current Imax, Normal-Duty and Heavy-Duty motor power (kW and HP), frame size, voltage class, enclosure, and +options. Reads the rating from ABB's published tables and flags when a current code does not exist at the entered voltage.
Available Fault Current Estimator
Calculate available fault current at any point in an electrical system. Point-to-point method for breaker AIC rating using transformer kVA, impedance, and wire run length.
Battery Energy Storage System (BESS) Sizing Calculator
Size commercial battery storage for peak shaving, TOU arbitrage, solar self-consumption, and backup with degradation modeling, IRA ITC analysis, and LCOS.
Cable Tray Fill Calculator (NEC 392)
Calculate cable tray fill per NEC Article 392 for ladder, ventilated trough, solid bottom, and channel trays. Multi-conductor and single-conductor rules.
Can I Run This On That?
Check if your circuit breaker and wiring can handle a specific appliance. Enter breaker size, wire gauge, and load wattage for a pass/fail verdict based on NEC standards.
Conduit Bending Calculator
Conduit bending calculator for EMT and rigid conduit. Benfield method for offsets, saddles, stub-ups, and back-to-back 90s. Shrink, multipliers, and marks.
Danfoss VLT Drive Decoder
Decode a Danfoss VLT FC type code (FC 301/302 AutomationDrive, FC 102 HVAC, FC 202 AQUA, FC 51 Micro Drive) into motor kW/HP, captured output currents, voltage class, and frame size. FC 102 current coverage is incomplete and flagged in the result. The power code is a kW key (PK75 = 0.75 kW, P11K = 11 kW), not a current, and the decoder rejects power/voltage combinations that are not cataloged instead of fabricating a number.
Data Center Power & Cooling Load Calculator
Calculate electrical power requirements and cooling loads for data center spaces with PUE estimation, redundancy planning, and carbon footprint analysis.
EV Charger Load & Panel Fit Check
Determine if your electrical panel can support an EV charger installation. Calculates NEC demand load, continuous load 125% sizing, wire sizing with voltage drop, and shows panel pass/marginal/fail with upgrade options including NEC 625.42 energy management.
Electrical Service & Transformer Sizing Calculator
Size transformers using NEC Article 220 demand factors. Enter your load inventory to calculate demand kVA and select the standard transformer size for single-phase or three-phase service.
Generator Sizing Calculator
What size generator do you need? Add your appliances and loads to calculate total running watts and starting surge. Get a recommended generator size with built-in headroom.
Grounding Electrode System Calculator
Calculate ground resistance for single rods, parallel rods, ground rings, and ground grids using Dwight's formulas per IEEE 142. Includes soil resistivity reference and NEC 250 pass/fail check.
Hazardous Area Code Translator
Decode a NEC Class/Division marking, an IEC/IECEx Ex string, or an ATEX marking, and translate between the systems. Surfaces the reversed gas-group lettering (NEC Group A is IEC IIC) and the lossy or ambiguous hops most cross-references hide.
Hazardous Location Classification Guide
Interactive decision-tree for NEC Article 500 (Class/Division) and Article 505 (Class/Zone) hazardous location classification. Identifies Group, T-code, and equipment requirements from the material present.
Junction Box Fill Calculator
NEC 314.16 junction box fill calculator. Count conductors, devices, and clamps to check cubic inch capacity. Avoid failed rough-in inspections.
Lighting Design / Foot-Candle Calculator
Calculate fixture count using the IES lumen method with Room Cavity Ratio, Coefficient of Utilization, and light loss factors. Includes IES illuminance targets for 15 space types, LED retrofit comparison, and IECC energy code compliance checks.
Motor FLA Lookup (NEC 430)
NEC Table 430.248 and 430.250 motor full-load current lookup with overload sizing, breaker/fuse sizing per 430.52, and wire sizing per 310.16.
Motor Starting Current / Code Letter Calculator
Convert NEC code letters (A through V) to locked-rotor starting amps. Starting-to-running ratio and starter recommendation for any motor.
Motor Starting Voltage Drop Calculator
Screen motor-start terminal voltage drop with local code-letter, transformer, and cable rows plus IEEE 3002.7, NEC/NEMA, utility, AHJ, and safe-work review boundaries.
NEC Conduit Fill Calculator
Calculate NEC Chapter 9 conduit fill for mixed conductor types. Check percent fill against code limits, get violation flags, and find the next size up recommendation.
NEMA Plug & Receptacle Reference
Interactive source-aware screen for common local NEMA plug and receptacle rows. Filter by voltage, amperage, grounding, and locking style while keeping WD 6, UL/listing, NEC, and AHJ gaps visible.
Ohm's Law / Power Wheel Calculator
All 12 Ohm's Law and Watt's Law relationships for DC, single-phase AC, and three-phase AC. Power triangle visualization with kW, kVA, kVAR, and power factor.
Panel Load Study
Do you actually need a panel upgrade? Walk your breaker panel with NEC Article 220 demand factors. See connected load vs. calculated demand and test whether an EV charger, heat pump, or hot tub fits.
Power Factor Correction Calculator
Calculate capacitor bank sizing for power factor correction with cost savings analysis.
PowerFlex Drive Decoder
Decode an Allen-Bradley / Rockwell PowerFlex catalog number into output current, Normal-Duty motor HP/kW, voltage class, frame, enclosure, and options. Handles both the dash-delimited 520-series (523 = 25A, 525 = 25B) and the fixed 18-character 750-series (753 = 20F, 755 = 20G, 755 with Options = 21G), and flags when a code, voltage, or frame combination is not a real drive.
Residential Electrical Load Calculator (NEC 220)
Calculate residential electrical service size using NEC 220.82 (new construction) and 220.83 (existing dwelling additions). Step-by-step demand breakdown with HVAC exclusive rule, EV charger loads, conductor sizing for copper and aluminum.
Square D Breaker Decoder
Decode a Square D QO / QOB / Homeline circuit-breaker catalog number (QO120, QO230, HOM250) into poles, amperage, voltage, and interrupting rating (AIC). The AIC is read from the Schneider interrupting-rating matrix on the full code: standard QO/QOB/HOM = 10 kA, QO-VH = 22 kA, QOH = 42 kA, QH = 65 kA, and a lone H on a 2-pole QO is a 240 Vac common-trip device that is still 10 kA. A combination not in the matrix is flagged needs-source, never guessed; PowerPacT/I-Line are out of scope. Always verify against the breaker label.
Torque to Horsepower Converter
Convert between torque and horsepower (or kW). HP = (T x RPM) / 5252. Includes efficiency chain, gearbox ratios, and quick reference table.
Transformer Fault Current Calculator
Available fault current at transformer secondary and downstream points. Point-to-point method with AIC rating recommendation.
Transformer Loss Evaluation (TOC) Calculator
Calculate total owning cost of transformers using the A and B factor method per IEEE C57.120. Compare up to 3 units with DOE 2016 efficiency checks.
Transformer Protection Calculator
Size transformer overcurrent protection per NEC 450.3. Primary and secondary fuse or breaker sizing for single-phase and three-phase transformers up to 1000V.
VFD Cross-Reference
Cross-reference a variable frequency drive across ABB ACS, Allen-Bradley PowerFlex, Yaskawa, and Danfoss VLT. Enter one drive by model code or by parameters (phase, voltage, motor kW/HP, duty, optional current) and get the closest equivalents in the other brands, matched on the electrical envelope with every difference shown. A sourcing starting point, not a certified drop-in: it does not verify dimensions, wiring, controls, safety, firmware, or approvals.
Wire & Cable Type Decoder
Decode a wire or cable marking (THWN-2, XHHW-2, SOOW, MC, NM-B, TC-ER, USE-2) into temperature ratings, ampacity basis, permitted locations, construction, and the governing UL standard. Built around the "-2" wet-rating trap and the NEC 110.14(C) termination ampacity gap.
Wire Sizing Calculator
Find the right AWG wire gauge for any electrical run. Enter amps, distance, and voltage to get NEC-compliant sizing with derating, voltage drop, and copper vs aluminum cost comparison.
Yaskawa Drive Decoder
Decode a Yaskawa AC drive code into Heavy-Duty and Normal-Duty output current, motor HP/kW, voltage class, EMC filter, and enclosure. Full 7-position decode for GA500 (CIPR-GA50U...) and GA800 (CIPR-GA80U...); legacy A1000 (CIMR-A...) and V1000 (CIMR-V...) are recognized and their ratings returned. Ratings are keyed on family plus model because the same model token (e.g. 2030) carries a different kW on the GA500 than on the GA800.
Productivity
25 toolsAnnual Income Calculator
Calculate total annual income from hourly wages with overtime, shift differential, and secondary income sources. Includes federal tax estimate and pay period breakdowns.
Apprentice Hours Tracker
Track OJT and classroom hours toward journeyman status for 15 trades. Shows wage step progression, projected completion date, and pace indicator.
Bonding Capacity Estimator
Estimate surety bonding capacity from working capital, net worth, and backlog. Financial strength scoring with single job and aggregate program limits.
Break & Lunch Compliance Checker
Check meal and rest break requirements for all 50 states. Shows required breaks for your shift length, premium pay penalties for violations, and federal FLSA rules.
Change Order Cost Calculator
Calculate the true cost of a change order including direct costs, extended overhead, remobilization, rework, engineering, and bond adjustments. Shows what contractors leave on the table when they only price direct costs.
Crew Rotation Visualizer
See all crews on one timeline. Visualize multi-crew shift coverage across days, weeks, and months. Spot handoff gaps, compare rotation patterns, export PDF timelines, and download ICS calendar files. Built for operations managers and plant schedulers.
DIY Project Plan Builder
Step-by-step build plans for mini-split installs, generator setups, shop heaters, outbuilding wiring, and water heater replacements. Get sized tool and material lists based on your calculator results.
Davis-Bacon Prevailing Wage Calculator
Calculate Davis-Bacon prevailing wage pay with correct overtime rules where fringe stays flat. Compare cash-vs-benefits tax savings, annualize fringe credits, and compute apprentice wage steps.
EV vs Gas Car Cost Calculator
Compare real-world total cost of ownership for electric vs gas vehicles. Includes state EV registration fees, insurance differences, winter efficiency penalties, charging mix, tire wear, maintenance, depreciation, and sensitivity analysis.
Equipment Ownership Cost Calculator
Calculate hourly ownership and operating cost for construction equipment per EP 1110-1-8 methodology. Depreciation, fuel, maintenance, and own-vs-rent break-even analysis.
Headcount Coverage Calculator
Calculate minimum staffing for 24/7 operations using relief factor analysis. Accounts for PTO, sick leave, training, FMLA, and workers comp with rotation presets including DuPont and Pitman.
Hourly Burden Rate Calculator
Calculate true hourly labor cost including wages, benefits, payroll taxes, insurance, overhead, and utilization rate. Essential for job costing and bid pricing in the trades.
Job Bid Builder
Build a complete job bid from labor, materials, equipment, subcontractors, overhead, and profit markup. Shows bid breakdown, effective margin, break-even price, and cost per unit.
Job Labor Estimator
Estimate construction man-hours by trade and task with productivity adjustments for weather, overtime, site conditions, night shift, confined space, and elevated work.
Local SEO Foundry
Plan and track your local SEO strategy. Manage business citations, review profiles, NAP consistency, and Google Business Profile optimization for contractors and local service businesses.
Markup vs Margin Calculator
Convert between markup percentage and profit margin. Calculate selling price from cost and desired markup or margin. Includes breakeven analysis and pricing tables.
Overtime Cost Projection Tool
Analyze the true cost of overtime including hidden costs like turnover, fatigue incidents, FICA, and workers comp. Compares OT strategy vs hiring additional staff with break-even analysis.
Overtime Pay Calculator
Calculate overtime pay with federal FLSA and state-specific daily OT rules for California, Alaska, Colorado, and Nevada. Handles anti-pyramiding, prevailing wage fringe, and common schedule presets.
Per Diem & Travel Pay Calculator
Calculate per diem, lodging, mileage, and mobilization costs with GSA rate tiers, first/last day 75% rule, meal deductions, and IRS mileage rates. Includes rate lookup guidance.
Productivity Rate Calculator
Truck hauling cycle time with match factor and bottleneck verdict, plus fencing crew-day rate by type, soil, terrain, and post method. Two estimating modes on one shared engine.
Rain Day & Weather Delay Tracker
Track weather delay days against contract allowance, project schedule impact, and compare delay costs versus Saturday make-up work with regional precipitation benchmarks.
Salary to Hourly Calculator
Convert pay periods with PTO, overtime, differential, 2026 federal/FICA, payroll, state, benefit, and tax-review warnings.
Shift Differential Calculator
Calculate night shift, weekend, and holiday differential costs for your workforce. Supports flat-dollar and percentage premiums with annual projections and what-if analysis.
Shift Schedule Generator
Build DuPont, Pitman, 4-on-4-off, and Continental rotation calendars with pay, fatigue, policy, and calendar-export boundaries visible.
Workers Comp Cost Estimator
Estimate workers compensation insurance premiums from payroll, classification codes, and experience modification rate (EMR). See how your EMR impacts your annual premium and cost per labor hour.
Machinist
23 toolsAISI/SAE Steel Grade Decoder
Decode AISI/SAE and stainless steel grades instantly. Alloy composition, machinability, heat treatment, weldability, and applications for carbon, alloy, tool, and stainless steels, with full stainless coverage: UNS S-numbers, EN 1.4xxx cross-reference, austenitic / ferritic / martensitic / duplex / PH family, and a computed PREN. Type a grade (316L, 2205), a UNS or EN number (S31603, 1.4404), or an application.
Advanced Tap Drill Calculator
Calculate tap drill sizes for any thread engagement percentage (50-85%) with full drill cross-reference in fractional, number, letter, and metric systems. UNC, UNF, and Metric threads.
Bend Deduction & K-Factor Calculator
Calculate bend allowance, bend deduction, K-factor, and flat pattern length for sheet metal bending. Supports air bending, bottoming, and coining with common materials.
Bolt Circle Calculator
Generate X/Y hole coordinates for bolt circle patterns. DRO-ready output with multiple pattern support, interactive SVG diagram, incremental coordinates, and G-code generation.
CNC G-Code Quick Reference
Searchable CNC G-code and M-code reference. Generic descriptions, syntax examples, and mill vs lathe applicability for 70+ codes. Controller-agnostic per ISO 6983.
CNC Job Setup Planning Sheet
Generate CNC job setup sheets with automatic speed, feed, and MRR calculations. Printable shop floor documents with chipload verification, workholding, and coolant notes.
Chip Load Calculator
Calculate chip load per tooth for milling, drilling, and turning. Forward and reverse modes with material-specific recommendations, chip thinning factor, and MRR. Metal and wood modes.
Clamping Force Calculator
Calculate workpiece clamping force from bolt torque, stud size, and friction coefficient. Yield strength safety check with visual warning system. SAE and metric bolt grades.
Compression Spring Calculator
Design helical compression springs. Spring rate, solid height, buckling check, stress at working length, and fatigue life per SMI standards.
Counterbore & Clearance Hole Calculator
Calculate clearance hole, counterbore, and countersink dimensions for socket head and hex cap screws. ASME B18.2, ISO 273, close/normal/loose fit. Inch and metric.
GD&T Quick Reference
Interactive GD&T reference for all 14 geometric tolerances per ASME Y14.5. Plain-English explanations, feature control frames, inspection methods, and common mistakes.
Machinability Comparison Tool
Compare machinability ratings, SFM ranges, and chip loads for 30+ metals. Filter by material category, operation type, and tooling. Interactive sortable reference.
Material Weight Calculator
Calculate weight of metal stock in 9 shapes: round bar, tube, square, hex, sheet, angle iron, and more. 16 materials with cut list builder and cost estimator.
Pipe Thread Dimension Calculator
Calculate NPT, NPTF, BSPT, and BSPP pipe thread dimensions. Tap drill sizes, taper rates, effective thread length, and pitch diameters for 1/8 through 4 inch pipe.
Sheet Metal Weight & Cost Calculator
Calculate sheet metal weight from gauge thickness, dimensions, and material type. Supports steel, stainless, aluminum, brass, and copper with gauge-to-thickness conversion tables.
Shop Math Worksheet
Combine tap drill, counterbore, material grade, and hardness calculations into one printable machine shop worksheet. All math free - professional PDF export.
Smart Drill Size Finder
Find any drill size instantly. Convert between fractional, letter, number, and metric drill sizes. Shows nearest alternatives in every system with tolerance from exact.
Surface Finish (Ra) Calculator
Calculate theoretical surface finish Ra from feed rate and tool nose radius. Forward and reverse modes with standard callout comparison chart. Turning, milling, and boring.
Taper & Angle Calculator
Calculate tapers, sine bar heights, tailstock offsets, and angle conversions. Includes Morse taper and Brown & Sharpe reference tables with full DMS angle output.
Thread Pitch Identifier
Identify unknown threads from caliper measurements. Cross-references UNC, UNF, Metric ISO, NPT, BSP, and ACME thread standards with tolerance matching and confidence scoring.
Thread Repair Insert Sizing Guide
Find the correct thread repair insert size for Helicoil, E-Z Lok, and Keensert systems. Tap drill, insert length, and installation torque by thread size.
Tolerance & Fit Calculator
ISO 286 tolerance zone calculator for shaft/hole fits. Calculates clearance, transition, and interference fits with visual tolerance zone diagram and common fit presets (H7/g6, H7/h6, H7/p6, etc.).
Weld Joint Prep Calculator
AWS D1.1 prequalified groove weld joint dimensions. Bevel angle, root opening, root face, groove angle, and effective throat for V, bevel, J, and U groove joints.
HVAC
20 toolsChimney & Flue Sizing Calculator
Size chimney flues per NFPA 211 for fireplaces, wood stoves, and gas appliances with draft check.
Duct Sizing Calculator
Size round and rectangular ductwork from CFM airflow and friction rate. Equal friction method with Darcy-Weisbach pressure drop. Round-to-rectangular equivalent calculations.
Expansion Tank Sizing Calculator
Preliminary diaphragm expansion-tank planning for closed-loop hydronic systems with absolute-pressure, glycol, source, and manufacturer warnings.
Glycol Freeze Protection Calculator
Determine required glycol concentration for freeze protection with performance penalties. Propylene and ethylene glycol data from ASHRAE Fundamentals Ch. 31 and Dow Chemical.
HVAC System Analyzer
6 HVAC calculators in one tool: cost per BTU, heat load, ventilation/ACH, switchover temp, duct sizing, and room CFM balancing. Built for technicians, contractors, and serious DIYers.
Heat Load from Bills Calculator
What size furnace or heat pump do you actually need? Skip the $300 Manual J - estimate your home's BTU/hr heat load from your gas, propane, or electric bills. See how your home compares by age and climate zone.
Heat Pump Water Heater ROI Calculator
Compare heat pump vs gas or electric resistance water heaters with COP adjusted for ambient temperature, IRA tax credits, and lifetime cost analysis.
Heating Bill ROI Calculator
Will a heat pump pay for itself? Enter 12 months of heating bills to see payback period, annual savings, and NPV analysis. Uses HDD regression and real COP curves for accurate projections.
Hydronic Pipe Sizing Calculator
Preliminary hydronic pipe planning for copper Type L, Type M, and black steel Schedule 40 using BTU/hr, delta-T, local fluid rows, straight-pipe friction, and velocity warnings.
Mini-Split Efficiency & Cost Calculator
Is your mini-split cheaper than propane right now? Enter your electric rate and fuel prices to find the exact outdoor temperature where your heat pump stops saving money and your backup heat wins.
Propane Tank Sizing Calculator
Size a residential or small-commercial propane tank based on total BTU demand, delivery interval, and climate. Checks vaporization rate limits in cold weather, applies diversity factors, and includes NFPA 58 setback requirements.
Propane Vaporization Rate Calculator
Check if your propane tank can vaporize enough gas for demand at a given temperature and fill level. Tank sizing, minimum fill level, cold weather warnings per NFPA 58.
Psychrometric Calculator
Calculate psychrometric properties from any two known values. Dry bulb, wet bulb, dew point, relative humidity, humidity ratio, enthalpy, and specific volume. ASHRAE standard correlations.
Refrigerant Charge Estimator
Calculate additional refrigerant charge needed for line sets longer than factory pre-charge length. Supports common refrigerants with liquid and suction line sizing.
Refrigerant Designation Decoder
Decode any refrigerant R-number (R-410A, R-32, R-1234yf, R-22, R-744). Explains the ASHRAE 34 numbering rules digit by digit, then gives the chemical family, blend composition, safety class, ODP, GWP, temperature glide, and what the refrigerant replaces or is replaced by. Reuses ToolGrit's shared refrigerant dataset so the numbers match the P-T chart and charge tools.
Refrigerant P-T Chart
Interactive pressure-temperature saturation chart for 13 common refrigerants including R-410A, R-22, R-134a, R-454B, and R-32. Bubble/dew point for R-407C, superheat/subcooling reference.
Superheat & Subcooling Calculator
Calculate superheat and subcooling for HVAC/R system diagnostics. Supports R-410A, R-22, R-134a, R-404A, R-407C, R-32, and R-290 refrigerants with saturation temperature lookup from measured pressures.
Water Hammer Calculator
Calculate pressure surge from valve closure using the Joukowsky equation. Wave speed, critical period, surge vs pipe rating comparison, and recommended minimum closure time.
Water Heater Recovery Time Calculator
Calculate water heater recovery time from BTU input, tank size, and temperature rise. Compare gas, electric, and heat pump recovery rates.
Water Heater Sizing Calculator
Size residential and light-commercial water heaters. Calculate first-hour rating, recovery rate, tank size, and compare energy costs across fuel types.
Emissions
19 toolsAP-42 Emission Factor Lookup
Browse EPA AP-42 emission factors for combustion sources, engines, turbines, and crushers. Enter capacity to calculate annual emissions with full section references.
Boiler Efficiency & Stack Loss Calculator
Calculate boiler combustion efficiency from stack temperature and flue gas analysis. See stack heat loss, excess air percentage, and annual fuel savings from tuning. Supports natural gas and oil-fired boilers.
CO2 Capture / Carbon Intensity Calculator
Calculate gross and net CO2 emissions with carbon capture, CH4 and N2O equivalents, and carbon intensity per unit output. Uses 40 CFR Part 98 factors.
Concrete Batch Plant Dust Emissions Calculator
Estimate particulate matter emissions from concrete batch plant operations using EPA AP-42 Chapter 11.12 factors. Calculate PM10 and PM2.5 from material handling, truck loading, and storage piles with control efficiency.
Control Device Efficiency Calculator
Calculate removal efficiency from inlet and outlet concentrations. Compare against typical ranges for baghouses, scrubbers, SCR, thermal oxidizers, and more.
Diesel Fuel Sulfur & Emissions Calculator
Calculate SOx emissions from diesel fuel based on sulfur content. Compare ULSD, off-road, and heating oil grades. See annual sulfur dioxide emissions and fleet-level environmental impact.
Emergency Generator Emissions Calculator
Calculate emissions from emergency and standby diesel generators. Check RICE NESHAP compliance with runtime hour tracking, non-emergency use limits, and annual emissions totals for permit applications.
Facility Emissions Inventory Calculator
Preliminary aggregation of user-entered facility emissions by pollutant with Title V, PSD, AP-42, HAP, state-rule, and permit-method warnings.
Fuel Combustion Emissions Calculator
Calculate CO2, NOx, SOx, and PM emissions from fuel combustion using EPA AP-42 emission factors. Supports natural gas, propane, diesel, fuel oil, and coal with annual emissions totals and cost-per-ton estimates.
GHG Reporting Consolidator
Consolidate Scope 1 combustion, fugitive refrigerant, and Scope 2 electricity emissions into a single CO2e inventory with eGRID factors and breakdown by scope.
Natural Gas vs Propane Emissions Calculator
Compare CO2, NOx, and total emissions between natural gas and propane for heating and process applications. See emissions per MMBtu delivered and annual totals based on your usage.
PSD / NSR Modification Calculator
Compare baseline vs post-modification emissions against PSD significance levels. Screen whether a process change triggers Prevention of Significant Deterioration or New Source Review.
Potential to Emit (PTE) Calculator
Calculate maximum theoretical emissions from boilers, engines, and turbines using AP-42 emission factors. Compares against major source thresholds for Title V applicability.
Refrigerant Leak CO2 Equivalent Calculator
Calculate CO2 equivalent emissions from refrigerant leaks using EPA GWP values. Supports R-410A, R-134a, R-22, R-404A, R-407C, R-32, R-1234yf, and more. See annual GHG inventory impact in metric tons CO2e.
Stack Flow & Mass Emissions Calculator
Convert stack test measurements to dry standard flow rates and mass emission rates. Handles acfm-to-dscfm conversion, O2 correction, and annual emissions.
Stack Opacity Assessment Tool
Estimate particulate matter emissions from visible stack opacity readings. Convert Method 9 opacity observations to approximate PM emission rates using EPA correlation methods.
Tank Breathing Loss Calculator
Calculate standing and working VOC emissions from fixed-roof storage tanks per EPA AP-42 Chapter 7.1. Includes paint absorptance, Antoine equation, and permitting thresholds.
Title V Permit Fee Calculator
Estimate annual Title V air permit fees based on actual pollutant emissions. Enter tons per year of each regulated pollutant to calculate state permit fees with major source threshold checks.
VOC Emissions from Coating Calculator
Calculate VOC emissions from paint, primer, and coating operations. Accounts for transfer efficiency, capture systems, and control devices. Supports conventional spray, HVLP, electrostatic, and dip applications.
Municipal
16 toolsAeration Energy Cost Calculator
Calculate blower energy consumption and annual operating cost for wastewater aeration basins. Compare blower technologies and estimate savings from DO control optimization and VFD retrofits.
Backflow Preventer Sizing Calculator
Size RPZ, DCVA, and PVB backflow prevention assemblies by flow rate and pressure loss. Covers cross-connection hazard levels per AWWA and local codes.
Chemical Dosing Calculator
Calculate gallons per day or pounds per day of chemical feed for any water or wastewater treatment process. Supports chlorine, alum, ferric chloride, polymer, lime, caustic, permanganate, and fluoride with automatic unit conversions and metering pump settings.
Clarifier Loading Rate Calculator
Calculate surface overflow rate, solids loading rate, and weir overflow rate for primary and secondary clarifiers. Check against design standards and model one-out-of-service scenarios.
Detention Time Calculator
Calculate hydraulic detention time for any basin, tank, or lagoon and check against regulatory minimums. Supports rectangular and circular tanks with dead zone correction for actual vs theoretical retention time.
Disinfection CT Value Calculator
Calculate CT values for chlorine disinfection and verify EPA Surface Water Treatment Rule compliance. Check Giardia and virus log inactivation credits based on residual, contact time, temperature, and pH.
Evaporation & Makeup Water Calculator
Calculate pond evaporation, seepage loss by liner type, and required makeup water flow. 12-month projection with climate zone presets and annual water cost estimate.
Lagoon & Stabilization Pond Sizing Calculator
Size facultative and aerated lagoons based on organic loading, climate zone, and detention time requirements. Includes earthwork estimates, aeration power requirements, and design standard compliance checks.
Lift Station Runtime & Backup Power Calculator
Calculate pump cycles, runtime hours, backup generator sizing, and time to overflow for any lift station. Size generators for emergency power and estimate fuel consumption during outages.
Open Channel Flow Calculator
Calculate open channel flow using Manning's equation for rectangular, trapezoidal, and circular channels.
Pond, Pit & Basin Fill/Drain Calculator
Calculate volume and fill/drain time for rectangular, circular, and frustum-shaped ponds, pits, and basins. Supports sloped sides, multi-pump configurations, and reverse solver for required GPM.
Pump Energy Cost Calculator
Calculate actual operating cost for any water or wastewater pump based on flow, head, efficiency, and runtime. Includes VFD retrofit savings analysis with simple payback and 10-year projection.
Rainwater Harvesting Calculator
Size rainwater collection systems from roof area and local rainfall data. Cistern volume, monthly supply vs demand balance, and first-flush diverter sizing.
Sludge Production & Disposal Cost Calculator
Estimate daily sludge production, dewatered volume, and annual disposal cost for any wastewater treatment plant. Compare disposal methods including land application, landfill, and incineration.
Water Tower Storage Sizing Calculator
Size elevated water storage based on fire protection, peak demand, and emergency reserve requirements. Follows AWWA guidelines for small water systems and rural water districts with standard tank size recommendations.
Weir Flow Rate Calculator
Calculate flow rate over rectangular, V-notch, and Cipolletti weirs with rating tables.
Geology & Drilling
12 toolsAnnular Velocity Calculator
Calculate annular velocity and flow rate for hole cleaning. Enter hole/pipe diameters and pump rate to get AV in ft/min with cuttings transport analysis.
Apparent vs True Dip Converter
Convert apparent and true dip from strike and cross-section bearing with USGS formula context and field-measurement caveats.
Blasting Powder Factor Calculator
Calculate powder factor for surface and underground blasting. Enter burden, spacing, hole depth, and charge weight for blast pattern optimization.
Darcy's Law Flow Calculator
Calculate groundwater flow rate using Darcy's Law. Enter hydraulic conductivity, gradient, and cross-section area for seepage velocity and flow volume estimates.
Drill String Buoyancy Factor Calculator
Calculate buoyancy factor, buoyed weight, and hook load for drill strings in drilling fluid. Essential for weight-on-bit planning and rig capacity checks.
Equivalent Circulating Density Calculator
Calculate ECD from mud weight and annular pressure loss. Determine safe operating window between pore pressure and fracture gradient for wellbore stability.
Formation Temperature Calculator
Estimate formation temperature at depth using geothermal gradient. Calculate temperature profiles for drilling, geothermal energy, and wellbore planning.
Hydrostatic Pressure Calculator
Calculate hydrostatic pressure from mud weight and true vertical depth. Oilfield imperial (ppg/psi) and metric (SG/kPa) units with overbalance analysis and pressure gradient.
Lag Time & Bottoms-Up Calculator
Calculate bottoms-up lag time and strokes from well geometry and pump data. Track drilling fluid returns for mud logging, gas detection, and wellbore monitoring.
Mud Weight Blend Calculator
Source-aware screen for drilling-fluid weight-up and dilution quantities. Uses local fixture rows with API/IADC/BSEE source-gap warnings; not a mud program, kill sheet, or pressure-control approval.
Rock Quality Designation Calculator
Calculate RQD from core logging data. Enter core piece lengths to get rock quality percentage with classification (excellent/good/fair/poor) per Deere 1967.
Stripping Ratio Calculator
Calculate stripping ratio for surface mining operations. Enter overburden and ore volumes to evaluate economic viability with breakeven analysis.
Agriculture
10 toolsAuger & Conveyor Sizing Calculator
Find the right auger diameter for your target bushels per hour. See capacity derating by angle and commodity, HP requirements, and time to fill a bin.
Bulk Fuel Storage & Consumption Planner
Size your on-farm fuel tanks based on peak seasonal consumption. Get reorder points, delivery schedules, DEF requirements, and annual fuel cost projections for your equipment fleet.
Electrical Load Panel Planner - Farm/Ag
Size electrical service for farm shops, grain handling, and livestock buildings using NEC Article 220 demand factors. Includes motor FLA lookup, conductor sizing, and transformer kVA recommendation.
Fertilizer Blend & Cost Calculator
Compare fertilizer products by cost per pound of actual nutrient delivered. Build custom blends, see excess nutrient waste, and generate printable blend tickets for dealer negotiation.
Field Operation Cost-Per-Acre Calculator
Calculate the true cost per acre for any field operation. Compare owning equipment vs. custom hiring with breakeven analysis. Includes fuel, labor, wear parts, and depreciation.
Grain Bin Capacity Calculator
Calculate bushel capacity for flat-bottom and hopper-bottom grain bins. Enter diameter, eave height, and commodity to get level fill, peaked fill, and partial fill volumes with weight estimates.
Grain Drying Cost Estimator
Calculate on-farm grain drying cost per bushel including fuel, shrink, and labor. Compare against elevator docking charges to find the cheaper option for your operation.
Grain Moisture Shrink Calculator
Calculate physical grain shrink from drying vs. elevator-applied shrink. See the hidden margin in your elevator's shrink factor and the dollar impact at current commodity prices.
Irrigation Pump & Pipe Sizing Calculator
Size irrigation pumps and pipes using Hazen-Williams friction loss calculations. Get total dynamic head, required pump HP, flow velocity checks, and energy cost estimates.
PTO & Drawbar Power Budget Calculator
Calculate available PTO and drawbar horsepower for your tractor-implement combination. See the chain of efficiency losses from engine to ground and get a clear pass/fail match verdict.
Hauling
8 toolsCost Per Mile Calculator
Owner-operator cost per mile across the full cost stack. Loaded vs deadhead CPM, break-even rate at any margin, and ATRI 2024 industry medians.
Fleet Fuel Comparison Calculator
Compare total cost of ownership for fleet vehicles across diesel, CNG, LNG, propane, and battery electric including infrastructure, maintenance, and emissions.
Fleet PM Cost Calculator
Calculate preventive maintenance costs for your fleet. Enter vehicle types and usage to see PM intervals, service costs, and compare in-house vs outsourced maintenance.
Fuel Surcharge Calculator
Compute trucking fuel surcharge per mile and per load using DOE-classic, step matrix, or flat percent programs. Side-by-side comparison and effective rate chart.
Hot Shot Trucking Profitability Calculator
Three modes (general hot shot, OTR Class 8, oilfield rig move) with deadhead modeling, fuel surcharge, accessorial pay, and the 26,001 lb CDL boundary check.
Junk Hauler Trip ROI Calculator
Single-trip ROI for junk haulers. Computes net profit, margin, hourly rate, expected value with no-show probability, and recommended minimum price.
Roll-Off Dumpster Profit & Pricing Calculator
Three modes for the roll-off dumpster business. Per-pull profit, fleet utilization with break-even pulls per week, and pricing recommendations by size with tipping-fee math.
Trucking Business Startup Cost Calculator
Estimate the all-in cost to start a trucking company including equipment, FMCSA authority (carrier or broker), insurance, ELD, and 90-day operating reserves.
Residential
6 toolsDrywall Estimator
Calculate drywall sheets, joint compound, tape, screws, and corner bead. Counts sheets per wall section (not per square foot), with fire rating, multi-room batch, and cut optimization.
Fence Material Takeoff Estimator
Calculate posts, rails, pickets, concrete, and hardware for wood privacy, shadowbox, split rail, chain link, vinyl, and metal panel fences. Frost line depth integration and gate sizing.
Insulation Calculator
Calculate insulation quantity by type for walls, attic, crawl space, and basement. Climate zone R-value targeting per IECC, cavity depth checks, settling factors, and vapor barrier recommendations.
Lumber & Framing Calculator
Preliminary wall-framing material takeoff for studs, plates, openings, board feet, and rough cut-list planning with code, header, supplier, and qualified-review warnings.
Paint Coverage Calculator
Calculate gallons of primer and topcoat needed for any room or project. Surface-aware coverage rates, color change logic, multi-room batch mode, and spray waste factors.
Tile & Flooring Calculator
Calculate tile count, boxes, thinset, grout, and cost for floors, walls, backsplashes, and showers. Pattern-aware waste factors for herringbone, diagonal, chevron, and more.
Solar & Renewables
6 toolsBattery Bank Sizing Calculator
Size lead-acid or LiFePO4 battery banks for off-grid and backup solar systems. Accounts for depth of discharge, days of autonomy, temperature derating, and battery configuration.
Charge Controller Sizing Calculator
Size MPPT and PWM solar charge controllers per NEC 690.7. Cold-weather Voc correction, string configuration, and common controller size recommendations.
DC Wire Sizing Calculator
Calculate wire gauge and voltage drop for 12V, 24V, and 48V DC circuits. Solar PV, RV, marine, and automotive applications with NEC ampacity verification and cost estimates.
Inverter Sizing Calculator
Match inverter capacity to your load and battery system. Appliance load builder with surge ratings, DC current draw, efficiency curves, and battery drain estimation.
Solar Array Sizing Calculator
Size your solar panel array from daily kWh load, peak sun hours by region, system losses, and tilt derating. Grid-tied and off-grid modes with monthly production estimates.
Solar ROI & Payback Calculator
Calculate solar payback period, NPV, IRR, and lifetime savings. Includes federal ITC, rate escalation, panel degradation, financing options, and 25-year cash flow analysis.
Structural
6 toolsConcrete Column Capacity Calculator
ACI 318-19 maximum axial compression capacity for tied and spiral reinforced concrete columns. Slenderness check, reinforcement ratio validation, and minimum tie/spiral requirements.
Footing Bearing Pressure Calculator
Check bearing pressure for spread footings with eccentric loading per ACI 318 and IBC Table 1806.2. One-way shear, two-way punching shear, and flexural reinforcement checks included.
Section Properties Calculator
Moment of inertia, section modulus, plastic modulus, and radius of gyration for rectangles, circles, hollow sections, I-beams, channels, angles, and tees. AISC W-shape lookup included.
Seismic Base Shear Calculator
ASCE 7-22 equivalent lateral force procedure. Design spectral accelerations, seismic design category, response coefficient Cs, and base shear V from building weight and structural system.
Wind Load Calculator (ASCE 7)
Design wind pressures for low-rise buildings per ASCE 7-22. Velocity pressure, MWFRS wall and roof pressures, exposure coefficients, and internal pressure for enclosed/partially enclosed buildings.
Wood Beam & Joist Span Calculator
Maximum allowable span for wood joists, rafters, and beams per NDS allowable stress design. Bending, shear, and deflection checks with species/grade reference values from the NDS Supplement.
Foodservice
5 toolsCommercial Hood Exhaust Sizing Calculator
Size commercial kitchen exhaust hoods per IMC 507. Assigns duty classification from appliance types and calculates required CFM by hood style.
Grease Interceptor / Trap Sizing Calculator
Calculate grease trap GPM rating and capacity per IPC standards. Enter sink compartments, drain time, and dishwasher connections.
Grease Trap Pumping Schedule Calculator
Calculate grease trap pumping frequency based on trap size, flow rate, and grease accumulation. Meets the 25% rule for FOG compliance.
Sanitizer Dilution & Health Code Checker
Calculate exact sanitizer concentrate amounts using C1V1=C2V2. Supports chlorine, quat, and iodine with FDA Food Code compliance check.
Walk-In Cooler/Freezer Heat Load Calculator
Calculate refrigeration load using the four-load method: transmission, product, internal, and infiltration. Returns BTU/hr and tonnage.
Hardscaping
5 toolsAggregate Compaction Shrink Calculator
Calculate loose material quantity needed for compacted fill. Includes swell factors, tonnage, and truck load count by material type.
Brick / Block / Paver Calculator
Calculate brick, block, or paver quantities with pattern-specific waste factors for walls, patios, walkways, and driveways. Includes mortar, sand, base material, polymeric sand, and edge restraint calculations with cost estimates.
Commercial Irrigation Zone Friction Loss Calculator
Calculate Hazen-Williams friction loss from point of connection to furthest sprinkler head. Includes fittings, elevation, and velocity check.
Mulch, Topsoil & Gravel Calculator
Source-aware landscape material planner for local cubic-yard, bag, weight, cost, and hauling screens. Verify supplier data, depth, settling, compaction, and payload limits before use.
Retaining Wall Geogrid & Block Calculator
Calculate block quantity, geogrid layers, drainage stone, and base trench dimensions for segmental retaining walls.
Marine
4 toolsABYC DC Wire Sizing & Voltage Drop Calculator
Size marine DC wiring per ABYC E-11. Calculates minimum AWG for voltage drop and ampacity with engine room derating.
Marine Battery Bank Sizing Calculator
Size house and starting battery banks for boats. Calculates CCA, Ah capacity with DoD limits, temperature derating, and chemistry comparison.
Propeller Pitch & Slip Calculator
Calculate theoretical boat speed and propeller slip percentage from RPM, gear ratio, pitch, and GPS speed.
Sacrificial Anode Weight Calculator
Size zinc, aluminum, or magnesium anodes for hull, shaft, and propeller corrosion protection by water type and surface area.
Arboriculture
3 toolsChipper Throughput & Truck Capacity Calculator
Estimate chip volume from whole-tree removal by DBH or board feet. Calculates expansion factor, truck loads, and weight limits.
Dynamic Rigging Shock Load Calculator
Calculate peak impact force on arborist rigging from free-fall distance, rope elongation, and rigging configuration.
Green Log Weight Estimator
Estimate green wood weight by species, diameter, and length with crane/loader WLL capacity check.
Live Events
3 toolsInverse Square Law / SPL Calculator
Calculate sound pressure level at any distance from speaker sensitivity, amplifier power, array configuration, and environment.
Projection Throw Ratio & Lens Calculator
Calculate projector throw ratio, lens type, and screen brightness in foot-lamberts for AV installations.
Temporary Event Power Distribution Calculator
Size generators, feeder cable, and company switches for live events. 3-phase load balancing with audio/lighting/video/motor categories.
Woodworking
2 toolsBoard Foot Calculator
Calculate board feet for rough and surfaced lumber. Quarter-thickness presets (4/4-16/4), cut list builder, species pricing reference, waste factor, and weight estimation for 10 hardwood and softwood species.
Wood Speeds & Feeds Calculator
CNC router speeds and feeds calculator for wood, plywood, MDF, acrylic, and composites. Router presets (DeWalt 611, Makita), tool type selection, burn/chip-out warnings, and DOC recommendations.
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