Construction & Unit Calculators

Calculate concrete volume, paint coverage, roof area, room square footage, and convert between metric and imperial — all in one place.

Calculate cubic yards of concrete for slabs, footings, columns, and steps with waste factor included.

Find out how many gallons of paint you need for walls, ceilings, and trim in any room size.

Calculate true roof area from your ground footprint and roof pitch, in squares and square feet.

Calculate room square footage for flooring, tile, and paint projects with a simple room measurement tool.

Convert between inches, feet, meters, and centimeters for any construction measurement instantly.

Plain-language answers to common construction calculation questions about concrete, paint, and materials.

Step-by-step guides for calculating concrete, paint, roofing materials, and unit conversions.