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Concrete Cement-Sand-Aggregate Mix Calculator

Quantities per m³ from mix ratio (1:x:y) and mix proportions.

Calculates the quantities (bags of cement, sand, and aggregate) needed for 1 m³ of concrete from a nominal mix ratio such as 1:2:4.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

cement_bags = 1/(1+s+a) × 1.54 / 0.0347; sand & aggregate by ratio

In depth

Calculates the quantities (bags of cement, sand, and aggregate) needed for 1 m³ of concrete from a nominal mix ratio such as 1:2:4.