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DIYCalcs

Measure once, buy right

How much
material do
you need?

Free calculators for home and yard projects. Type your measurements in feet and inches and get the bags, yards, tons, sheets or gallons to buy, from manufacturer data and the building code.

10 FT 10 FT 4 IN

Example · concrete slab + 10% waste

1.36

cubic yards

62

80 lb bags

36.7

cubic feet

Try the concrete calculator

Concrete & masonry

3 tools

Yard & landscaping

5 tools

Interior

5 tools

Building & roofing

3 tools

Published numbers only

Bag yields from Quikrete's data sheets, AC sizes from ENERGY STAR, stair and roof rules from the International Residential Code, mud and tape from USG.

Built for real measuring

Feet and inches in separate boxes, fractions like 7 3/4 understood, and waste allowances you can change.

Nothing to sign up for

Every calculation runs in your browser. We never see or store the measurements you type.

Every page lists its formula and sources. How we build the calculators →