Calculate concrete volume from length, width, thickness and a waste allowance.
Results are for information and preliminary estimation. For critical technical work, manufacturer data, local codes and qualified professional review take precedence.
Volume = length × width × thickness. Waste allowance covers formwork and site tolerances.
A 5 × 4 m slab at 12 cm thickness requires 2.4 m³ theoretically.
Renovation estimates are most sensitive to measurements, product coverage and waste allowance. Before ordering, verify the result against the actual m²/L, m²/pack or unit coverage printed on the product.
The tool accepts centimetres and converts automatically.
It depends on site conditions; confirm the order quantity with the contractor and supplier.
Tell us if a calculation is unclear, incomplete or appears incorrect.