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
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
Landscapers
Painters
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
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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