Concrete calculator
How much concrete do you need?
Choose the shape, enter your measurements in metric or imperial, and you’ll get the volume in cubic metres. Then send it straight to us for a quote.
Try an example
The sums
How the volume is worked out
Every measurement is converted to metres first. Depth in millimetres is the figure most often entered incorrectly.
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Slab or base
length × width × depth
4 m × 3 m × 0.1 m = 1.20 m³
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Strip foundation
length × trench width × depth
10 m × 0.6 m × 1 m = 6.00 m³
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Post holes
3.14 × (diameter ÷ 2)² × depth × holes
6 holes, 0.3 m × 0.6 m = 0.25 m³
Before you order
Getting the number right
- Measure the depth in a few places. Ground is rarely level, so use an average rather than the shallowest point.
- Split irregular shapes into rectangles. Enter each one and press “Add another area” to build up a single total.
- Don’t round up to a full load. We mix on site, so if you need a little more or less on the day, you pay for what’s poured.
- Not sure of the grade? The strength guide lists typical uses for C10 to C50.
- 1
Get your volume from the calculator above
- 2
Select “Request a quote” and the volume is added to the enquiry form
- 3
Add the postcode and date, and we’ll send you a price