Your Hub for Precision, Power, and Grit
Free online calculators and tools built for technicians, electricians, HVAC pros, farmers, and DIYers. All tools run in your browser - no sign-ups, no ads, no data selling.
Built for the Trades
Practical tools organized by what you do.
HVAC
Heat load estimators, efficiency calculators, system analyzers, and ROI tools for HVAC professionals.
View HVAC Tools →Electrical
Wire sizing, load calculations, generator sizing, and NEC-based circuit compatibility checks.
View Electrical Tools →Industrial
Air compressor analysis, leak detection calculations, and energy loss estimators for industrial facilities.
View Industrial Tools →Safety
Lockout/tagout permit management and compliance documentation tools for maintenance teams.
View Safety Tools →Productivity
Shift schedule generators, crew rotation visualizers, and business planning tools.
View Productivity Tools →Agriculture
Grain storage, drying cost, auger sizing, fertilizer blending, irrigation, and power budget calculators for farmers.
View Ag Tools →Municipal
Chemical dosing, detention time, CT value, clarifier loading, and lagoon sizing tools for water and wastewater operators.
View Municipal Tools →Emissions
Fuel combustion, refrigerant leak, VOC coating, diesel sulfur, and Title V fee calculators for environmental compliance.
View Emissions Tools →Shops & Outbuildings
Heater sizing, voltage drop, snow load, well pump sizing, and machine shop power calculators for outbuildings and workshops.
View Shop Tools →Machinist
Speeds & feeds, chip load, tolerance fits, thread ID, taper angles, bolt circles, and material weight calculators for machinists.
View Machinist Tools →Woodworking
Wood feeds & speeds, board foot calculations, and CNC routing tools for woodworkers and cabinet makers.
View Woodworking Tools →Solar & Renewables
Solar array sizing, battery bank capacity, DC wire sizing, charge controllers, inverters, and ROI calculators for off-grid and backup systems.
View Solar Tools →Geology & Drilling
Hydrostatic pressure, ECD, annular velocity, mud weight, formation temperature, and blasting calculators for geologists and drillers.
View Geology Tools →Foodservice
Hood exhaust CFM, grease interceptor sizing, walk-in cooler heat load, and sanitizer dilution calculators for commercial kitchens.
View Foodservice Tools →Marine
Battery bank sizing, DC wire sizing, propeller slip, and sacrificial anode calculators for boat builders and marine electricians.
View Marine Tools →Hardscaping
Aggregate compaction, retaining wall design, and irrigation zone friction loss calculators for hardscape contractors and landscape engineers.
View Hardscaping Tools →Arboriculture
Green log weight, rigging shock load, and chipper throughput calculators for arborists and tree service crews.
View Arboriculture Tools →Live Events
SPL distance, projector throw ratio, and temporary power distribution calculators for AV techs and event production crews.
View Live Events Tools →Residential
Paint coverage, wallpaper, flooring, drywall, fencing, lumber framing, and insulation estimators for homeowners and contractors.
View Residential Tools →Structural & Civil
Wood beam spans, wind loads, section properties, concrete columns, seismic base shear, and footing bearing calculators for structural engineers.
View Structural Tools →Hauling & Trucking
Cost per mile, fuel surcharge, dumpster profit, junk hauler ROI, hot shot trucking, and trucking startup cost calculators for owner-operators and small fleets.
View Hauling Tools →Featured Tools
Jump right in - these tools are ready to use now.
Crane & Rigging Calculator
Calculate sling tension, angle factors, and working load limits for multi-leg rigging configurations.
Transformer Fault Current Calculator
Available fault current at transformer secondary and downstream points. Point-to-point method with AIC rating recommendation.
Green Log Weight Estimator
Estimate green wood weight by species, diameter, and length with crane/loader WLL capacity check.
Heat Index & Work/Rest Schedule Calculator
Calculate heat index and OSHA heat stress work/rest schedule with water intake recommendations.
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.
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.
Why ToolGrit?
ToolGrit exists because trade professionals deserve better tools. Not bloated apps that require accounts, not calculators buried behind paywalls, and definitely not tools that sell your data.
Every calculator on ToolGrit runs entirely in your browser. Your data stays on your device. No accounts needed. No ads or data selling. Just open and use.
Whether you're an HVAC tech sizing a system, an electrician pulling wire, a farmer planning grain storage, or a homeowner trying to understand your energy bills - there's a ToolGrit calculator built for you.