# Concrete Materials Calculator

Metric

click here for our Imperial calculator

These Concrete Calculators provide the required quantities of cement and all-in ballast or cement, sharp sand and gravel required to give a defined volume of finished concrete. Both of these concrete calculators make an allowance for the fact that material losses volume after being mixed to make concrete.

Calculator are provided for a general mix and a paving mix, the different ratio of materials are:

- General mix - 1:5 cement:all-in ballast or 1:2½:3½ cement:sharp sand:gravel.

and - Paving mix - 1:3½ cement:all-in ballast or 1:1½:2½ cement:sharp sand:gravel.

## General metric mix - 1:5 or 1:2½:3½

## Paving metric mix - 1:3½ or 1:1½:2½