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 →Featured Tools
Jump right in - these tools are ready to use now.
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.
Valve Stroke Time Calculator
Calculate pneumatic valve stroke time from actuator volume, supply pressure, and system Cv. Identifies undersized tubing and slow-stroking valves.
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.
Mud Weight Blend Calculator
Calculate volumes needed to blend drilling mud to a target weight. Mix heavy and light muds, add barite or water to adjust mud weight for wellbore pressure control.
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.
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.
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.