How much concrete will I need?

Concrete quantities, like any other measure of volume, are calculated by multiplying length x width x depth (or height) and are measured in cubic metres (m3).

For example: If a room measures 3m x 4m and the depth of the concrete floor is to be 100mm, the calculation is 3 x 4 x 0.1 = 1.2m3. Make sure that you work out your sum in the same units (don’t mix metres and millimetres or yards and feet), and bear in mind that it’s generally easier to work with the metric system. A concrete calculator for slabs and holes is included on many of the pages on our website. Click Here to use the calculator