Free Home & Construction Calculators

Every material question, answered instantly — concrete, paint, flooring, gravel, fencing and more. No sign-up, results as you type.

Rooms → total sq ft, yards & m².

Slab → yards, 60/80 lb bags, ready-mix.

Walls − doors − windows → gallons.

KD21

Area + depth → tons & yards.

Beds → yards and 2/3 ft³ bags.

Walls + ceiling → sheets, screws, mud.

Area + tile size → tiles & boxes.

Rooms + box coverage → boxes.

Length → posts, rails, pickets, concrete.