About the Mortar Calculator
Mortar volume, cement and sand for brickwork, blockwork or pointing at any mix ratio.
Also known as: mortar mix calculator, sand and cement mortar, pointing mortar, how much mortar.
How to use this calculator
- Enter calculate from, mix ratio, waste allowance and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
dry volume = wet × 1.33, split 1 : n between cement and sand
Worked example
Using the values pre-filled in the calculator above:
- Calculate from: Wall area
- Wall area = 30 m²
- Work type: Brickwork, half brick
- Mix ratio: 1 : 5 (general purpose)
- Waste allowance = 10 %
the calculator returns:
- Mortar volume: 0.99 m³
- Cement: 316 kg
- Cement bags (50 kg): 7
- Sand: 1.0973 m³