Concrete Calculator
Calculate cement, sand and aggregate for patios, driveways, shed bases, foundations and fence posts.
How to use this calculator
1. Choose your project type
Select patio, driveway, shed base, foundation, or fence posts to get recommended depth.
2. Enter dimensions
Measure and enter the length, width and depth of your concrete area in metres.
3. Select concrete mix
Choose general purpose (1:2:4), strong mix (1:1.5:3), or foundation mix (1:2.5:3.5).
4. Calculate materials
Click Calculate to see the quantities of cement, sand and aggregate needed.
5. Add to project
Save materials to a project to compare prices from UK suppliers.