Concrete calculators
Concrete quantities come down to volume, and volume comes down to getting the thickness right. These tools handle the arithmetic and keep the wastage allowance visible, so you can see exactly what you are ordering and why. None of them size a structural member — that is a design decision that belongs on your drawings.
- Concrete Volume Calculator Work out the volume of concrete needed for a rectangular pour, with an allowance for wastage.
- Concrete Slab Calculator Size a floor or ground slab: volume, ready-mix load, weight and area, including an edge thickening if there is one.
- Concrete Footing Calculator Calculate concrete for strip footings or a set of identical pad footings.
- Concrete Bags Calculator Convert a concrete volume into the number of pre-mixed bags needed, for small pours where ready-mix is not practical.