Tools & Calculators
Practical online tools built for trade professionals and DIYers. All calculators run directly in your browser - no sign-ups, logins, or tracking scripts.
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.
No Accounts. No Tracking. Just Tools.
Every calculator on ToolGrit runs entirely in your browser. Your data never leaves your device. We don't need your email, and we don't run tracking scripts.