Calculate Concrete Needed

Calculate how much concrete you need for a slab, post, or wall.

Slab Length (ft)

Slab Width (ft)

Slab Depth (inches)

Cubic Yards

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80lb Bags Needed

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The Methodology

Length * Width * Depth

This tool uses the verified professional formula shown above. We cite our sources so you can trust every result.

How it works

This tool converts your dimensions into cubic feet, then into cubic yards (the standard unit for ordering concrete from a truck). It also estimates the number of 80lb bags if you are mixing it yourself.