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Concrete Calculator
Calculate cubic yards of concrete needed, including waste factor and an estimated material cost.
● Live calculatorInputs
Primary result
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Cubic yards = (length × width × depth ÷ 12) ÷ 27 × (1 + waste / 100)
How this calculator works
Calculate cubic yards of concrete needed, including waste factor and an estimated material cost.
The calculator keeps the inputs visible alongside the result so you can compare assumptions, change one value at a time, and copy or print the current estimate.
Frequently asked questions
Why add waste?
Spillage and uneven ground can make a 5–10% allowance useful.
What thickness should I use?
Four inches is common for sidewalks; follow local codes for structural work.