Tools & Calculators
Practical online tools built for trade professionals and DIYers. All calculators run directly in your browser - no sign-ups, no ads, no data selling.
All Tools
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.
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.
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.
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.
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.
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.
Shift Schedule Generator
Generate DuPont, Pitman, 4-on-4-off, and Continental shift calendars with built-in pay and overtime calculator. See your gross earnings per pay period, customize crew colors, and download printable PDF schedules.
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, and export PDF timelines. Built for operations managers and plant schedulers.
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.
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.
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.
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.
Energy Efficiency Calculator
Calculadora de eficiencia energetica en espanol. Compare heat pump vs propane, gas, and oil costs at every temperature. Full bilingual English/Spanish mini-split cost calculator.
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 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.
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.
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 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.
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.
Auger & 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.
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.
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.
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.
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.
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.
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.
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.
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.
Aeration 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.
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.
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.
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.
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.
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.
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.
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.
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.
Stack Opacity to PM Estimator
Estimate particulate matter emissions from visible stack opacity readings. Convert Method 9 opacity observations to approximate PM emission rates using EPA correlation methods.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
No Accounts. No Ads. Just Tools.
Every calculator on ToolGrit runs entirely in your browser. Your data never leaves your device. No accounts, no ads, no data selling. We use minimal, privacy-respecting analytics to improve the site - nothing more.