Free construction calculators
Interactive calculators for concrete, roofing, paint and more. Enter your numbers and get instant material estimates with a step-by-step breakdown and cited sources.
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Concrete Calculator
Free concrete calculator that turns your slab, footing, or pad dimensions into cubic yards and the number of pre-mix bags you need. Enter...
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Paint Calculator
Free paint calculator that turns wall area, number of coats, and coverage into the gallons of paint you need. Use it as a paint coverage ...
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Roofing Calculator
Free roofing calculator that converts your roof footprint and pitch into roofing squares, shingle bundles, and estimated cost. Works as a...
About USBuildCalc
Free construction calculators for contractors and DIYers in the US. Calculate concrete cubic yards, roofing squares, paint gallons, drywall sheets, lumber boards, and more. Built with stable physics formulas and 2026 material price ranges.
Free construction & DIY calculators — concrete, roofing, paint, drywall and more for US contractors and homeowners