10 calculators

Home project calculators

Pick your project. Each calculator shows its formula, runs in your browser, prints a shopping list, and cites the manufacturer data sheet or building code behind its default numbers.

Concrete

Slabs, footings, posts and steps

Concrete CalculatorCubic yards and 40, 60 or 80 lb bags for slabs, footings, columns and steps.

Landscaping

Mulch, gravel and topsoil by the yard or bag

Mulch CalculatorCubic yards or 2 and 3 cu ft bags from bed size and depth.
Gravel CalculatorCubic yards and tons for pea gravel, #57, river rock, limestone, DG or sand.
Topsoil CalculatorCubic yards, tons and bags of topsoil from area and depth.

Paint

Walls, ceilings and coats

Paint CalculatorGallons and quarts for walls and ceilings, minus doors and windows.

Roofing

Pitch, squares and bundles

Roof Pitch CalculatorRise and run or angle to x/12 pitch, degrees and multiplier.
Roofing CalculatorRoof area, squares, shingle bundles, starter and ridge cap.

Stairs

Risers, treads and stringers

Stair CalculatorRisers, treads, stringer length and angle, checked against IRC R311.7.

Measuring

Area and volume conversions

Square Footage CalculatorSquare feet, square yards and square meters for any room shape.
Cubic Yard CalculatorLength × width × depth to cubic yards, cubic feet and cubic meters.