Free Tools

Contractor Calculators

25 free tools built for tradespeople. No signup, no ads. Just fast, accurate calculations.

General

Concrete Calculator

Calculate cubic yards and bags of concrete needed for slabs, footings, and pours.

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Flooring Calculator

Calculate square footage and boxes of flooring needed with waste factor included.

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Job Markup Calculator

Price jobs correctly by calculating the right markup, margin, and final selling price.

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Hourly Rate Calculator

Calculate what you need to charge per hour to hit your income and overhead goals.

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Square Footage Calculator

Calculate the square footage of rectangular, circular, triangular, or L-shaped areas.

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Board Foot Calculator

Calculate board feet for lumber purchasing based on thickness, width, and length.

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Deck Builders

Deck Board Calculator

Calculate how many deck boards you need based on deck size, board width, and spacing.

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Deck Stain and Sealer Calculator

Find out how many gallons of stain or sealer you need for any deck size and number of coats.

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Electricians

Wire Gauge Calculator

Find the correct AWG wire gauge for any amperage load based on NEC ampacity tables.

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Voltage Drop Calculator

Calculate voltage drop across a wire run to ensure code compliance and proper performance.

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Conduit Fill Calculator

Check NEC conduit fill percentage for your conduit size and wire configuration.

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Fence Contractors

Fence Calculator

Calculate posts, rails, pickets, and concrete needed for any fence project.

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HVAC

BTU Calculator

Estimate the BTU output needed to heat or cool any room based on size, insulation, and climate.

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Landscapers

Mulch Calculator

Calculate cubic yards and bags of mulch needed for any landscaping bed or area.

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Gravel and Stone Calculator

Calculate cubic yards and tons of gravel, crushed stone, or sand needed for any project.

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Painters

Paint Calculator

Calculate how many gallons of paint you need for any room, accounting for doors, windows, and coats.

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Wallpaper Calculator

Calculate how many rolls of wallpaper you need including pattern repeat allowance.

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Plumbers

Pipe Size Calculator

Determine the right pipe diameter for your water supply line based on flow rate and velocity.

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Water Heater Size Calculator

Find the right water heater tank size or tankless flow rate for any household size.

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Drain Slope Calculator

Calculate the required drop for proper drain pipe slope per plumbing code.

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Remodelers

Drywall Calculator

Calculate sheets of drywall, joint compound, tape, and screws needed for any room.

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Staircase Calculator

Calculate riser height, tread depth, number of steps, and total run for code-compliant stairs.

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Roofers

Roofing Calculator

Calculate roofing squares and shingle bundles needed for any roof size and pitch.

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Roof Pitch Calculator

Convert roof rise and run to pitch ratio, angle in degrees, and slope multiplier.

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Gutter Calculator

Estimate linear feet of gutters and number of downspouts needed for any roof.

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