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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.

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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.

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Electrical

Wire sizing, load calculations, generator sizing, and NEC-based circuit compatibility checks.

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Industrial

Air compressor analysis, leak detection calculations, and energy loss estimators for industrial facilities.

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Safety

Lockout/tagout permit management and compliance documentation tools for maintenance teams.

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Productivity

Shift schedule generators, crew rotation visualizers, and business planning tools.

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Agriculture

Grain storage, drying cost, auger sizing, fertilizer blending, irrigation, and power budget calculators for farmers.

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Municipal

Chemical dosing, detention time, CT value, clarifier loading, and lagoon sizing tools for water and wastewater operators.

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Emissions

Fuel combustion, refrigerant leak, VOC coating, diesel sulfur, and Title V fee calculators for environmental compliance.

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Shops & Outbuildings

Heater sizing, voltage drop, snow load, well pump sizing, and machine shop power calculators for outbuildings and workshops.

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Machinist

Speeds & feeds, chip load, tolerance fits, thread ID, taper angles, bolt circles, and material weight calculators for machinists.

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Woodworking

Wood feeds & speeds, board foot calculations, and CNC routing tools for woodworkers and cabinet makers.

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Solar & Renewables

Solar array sizing, battery bank capacity, DC wire sizing, charge controllers, inverters, and ROI calculators for off-grid and backup systems.

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Geology & Drilling

Hydrostatic pressure, ECD, annular velocity, mud weight, formation temperature, and blasting calculators for geologists and drillers.

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Foodservice

Hood exhaust CFM, grease interceptor sizing, walk-in cooler heat load, and sanitizer dilution calculators for commercial kitchens.

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Marine

Battery bank sizing, DC wire sizing, propeller slip, and sacrificial anode calculators for boat builders and marine electricians.

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Hardscaping

Aggregate compaction, retaining wall design, and irrigation zone friction loss calculators for hardscape contractors and landscape engineers.

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Arboriculture

Green log weight, rigging shock load, and chipper throughput calculators for arborists and tree service crews.

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Live Events

SPL distance, projector throw ratio, and temporary power distribution calculators for AV techs and event production crews.

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Residential

Paint coverage, wallpaper, flooring, drywall, fencing, lumber framing, and insulation estimators for homeowners and contractors.

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Structural & Civil

Wood beam spans, wind loads, section properties, concrete columns, seismic base shear, and footing bearing calculators for structural engineers.

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Featured Tools

Jump right in - these tools are ready to use now.

Municipal Live

Open Channel Flow Calculator

Calculate open channel flow using Manning's equation for rectangular, trapezoidal, and circular channels.

Shops & Outbuildings Live

Motor Slip & RPM Calculator

Calculate motor slip percentage, synchronous speed, and actual RPM from nameplate data. Includes NEMA design letter reference and RPM vs load table.

Productivity Live

Overtime Pay Calculator

Calculate overtime pay with federal FLSA and state-specific daily OT rules for California, Alaska, Colorado, and Nevada. Handles anti-pyramiding, prevailing wage fringe, and common schedule presets.

Shops & Outbuildings Live

Speeds & Feeds Calculator

Calculate optimal RPM and feed rate for milling and drilling operations. Select material and tool diameter to get recommended cutting speeds, chip load, and material removal rate with risk tier classification.

Machinist Live

Job Setup Sheet Generator

Generate CNC job setup sheets with automatic speed, feed, and MRR calculations. Printable shop floor documents with chipload verification, workholding, and coolant notes.

Geology & Drilling Live

Stripping Ratio Calculator

Calculate stripping ratio for surface mining operations. Enter overburden and ore volumes to evaluate economic viability with breakeven analysis.

View All 340 Tools

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.