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.
Steam Properties Calculator
Look up saturated and superheated steam properties. Temperature, pressure, specific volume, enthalpy, entropy for water and steam. IAPWS-IF97 polynomial approximations.
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.
Blasting Powder Factor Calculator
Calculate powder factor for surface and underground blasting. Enter burden, spacing, hole depth, and charge weight for blast pattern optimization.
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.
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.
Basic 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.
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.