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© Nutter Toolsnutter.tools
  1. Home
  2. Units & math
  3. Concrete calculator
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Concrete calculator

Work out concrete volume and bag count for slabs, columns, and circular slabs from your dimensions, with a waste allowance.

This tool is in beta

Still being tested. If a result looks wrong, tell us.

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Pick a shape and enter the dimensions to size the pour.

This is the plain geometric volume plus your waste allowance; it does not know about rebar displacement, formwork buckles, subgrade gaps, or what your supplier actually delivers. Order a little over the bag count on any pour that cannot have a cold joint, because running short mid-pour is the one mistake this tool cannot price for you.

The pour

Shape
More settings▾

All dimensions are metres, up to 10,000 m each. Waste runs from 0 to 50 percent; the yield must sit under 2 m³ per bag, which covers a bulk bag with room to spare. On the round shapes the width field is the diameter and the length field does not apply.

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