Home & DIY Calculators

Estimate materials before you buy: how many bags of concrete a slab needs, gallons of paint for a room, bundles of shingles for a roof pitch, tiles, mulch and gravel by area and depth. Each estimator states its assumptions and rounds up the way suppliers sell.

• Square Footage CalculatorThe square footage of a room or area from its length and width — with square yards and square meters.
• Concrete CalculatorConcrete for a slab: cubic yards to order, or how many 80 lb and 60 lb bags to buy.
• Paint CalculatorHow many gallons of paint a room needs, from wall length, height, doors and windows.
• Roofing CalculatorRoof area, roofing squares and shingle bundles from the house footprint and roof pitch.
• Tile CalculatorHow many tiles a floor or wall needs, by tile size, with waste included.
• Mulch CalculatorCubic yards or bags of mulch for a bed, from its area and depth.
• Gravel CalculatorCubic yards and tons of gravel for a driveway or path, from area and depth.