Construction calculators
22 calculators
Construction calculators estimate material quantities and simple layout math from the dimensions you enter.
Waste factors, code requirements, and site conditions are not included unless listed. Treat results as a first pass before ordering materials. Material estimators open with no account.
Concrete calculators
Slabs, steps, and volume estimates.
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Concrete Ark Volume Calculator
Volume of a semicircular (arch) vault: half-cylinder approximation.
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Concrete Round Slab Volume Calculator
Volume of a circular slab from diameter and thickness.
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Concrete Steps Calculator
Approximate solid concrete volume for a straight staircase.
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Concrete Volume Calculator
Rectangular pour volume from length, width, and thickness.
Mulch and coverage calculators
Beds, borders, and volume by shape.
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Mulch Annulus Calculator
Mulch volume for a ring (annulus) bed between two radii.
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Mulch Calculator
Mulch volume from known coverage area and depth.
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Mulch Circle Volume Calculator
Mulch volume for a circular bed.
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Mulch Rectangle Calculator
Mulch volume for a rectangular bed.
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Mulch Square Calculator
Mulch volume for a square bed.
Flooring and materials calculators
Square-footage cost, paint, drywall, decking, and fence.
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Circle Footage Cost Calculator
Cost of a circular area from radius and cost per ft².
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Decking Boards Calculator
Board count across a width for decking.
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Drywall Sheets Calculator
Drywall sheets from wall area, waste, and sheet size.
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Fence Material Calculator
Posts, panels, and rails for a straight fence run.
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Footage Cost Calculator
Total cost from area and cost per square unit.
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Paint Estimator Calculator
Estimate paint gallons for walls (length as perimeter).
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Rectangle Footage Cost Calculator
Cost of a rectangular area from length, width, and cost per ft².
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Square Footage Cost Calculator
Cost of a square area from side length and cost per ft².
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Triangle Footage Cost Calculator
Cost of a triangular area from base, height, and cost per ft².
Layout calculators
Roof pitch, stairs, and mixed-unit lengths.
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Feet and Inches Calculator
Convert feet + inches into total inches, decimal feet, meters, and centimeters.
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Meters and Centimeters Calculator
Convert meters + centimeters into total cm, decimal meters, feet, and inches.
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Roof Pitch Calculator
Pitch ratio and angle from rise and run.
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Stair Stringer Calculator
Riser count, actual rise, and total run for stairs.