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Concrete Volume

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Concrete volume for rectangular elements with wastage allowance, optional weight and a rounded-up order quantity.

Worked example: floor slab

10 m × 6 m × 150 mm, 1 element, 3% wastage, density 2400 kg/m³

V = 10 × 6 × 0.15 = 9.000 m³
With wastage = 9.000 × 1.03 = 9.270 m³
Order (0.5 m³ steps) = 9.5 m³
Weight = 9.270 × 2400 = 22 248 kg ≈ 22.25 t

What wastage should I use?

It depends on the element and site conditions; enter the allowance your project uses. The calculator does not assume one.

Why is the order quantity rounded up?

Ready-mixed concrete is ordered in fixed increments; choose the increment your supplier uses.

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