How it works
Enter rectangular dimensions in metres. Allowing extra for waste is useful, but shape irregularities and engineering requirements need separate attention.
FormulaConcrete (m³) = length (m) × width (m) × depth (m).
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Estimate the concrete volume needed for a slab, footing or rectangular base.
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YOUR RESULT
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Concrete volume: a worked example
With length (m) 5, width (m) 3, depth (m) 0.15, extra allowance (%) 5, the concrete to order is 2.363 m³.
| Length (m) | 5 |
|---|---|
| Width (m) | 3 |
| Depth (m) | 0.15 |
| Extra allowance (%) | 5 |
| Concrete to order | 2.363 m³ |
|---|---|
| Basic volume | 2.25 m³ |
| Extra allowance | 0.113 m³ |
Amounts are shown in US dollars for illustration. Choose your own currency in the calculator above; it labels amounts and does not convert them.
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Frequently asked questions
How is the concrete volume calculated?
Concrete (m³) = length (m) × width (m) × depth (m). Enter rectangular dimensions in metres. Allowing extra for waste is useful, but shape irregularities and engineering requirements need separate attention.
What does the concrete volume example show?
With length (m) 5, width (m) 3, depth (m) 0.15, extra allowance (%) 5, the concrete to order is 2.363 m³. Basic volume: 2.25 m³; Extra allowance: 0.113 m³.
What assumptions and limits apply?
This is an estimate based on the inputs and assumptions shown on this page, not professional advice. Check anything with financial, health or safety consequences independently.
Is my data private?
Yes. Calculations run in your browser and your numbers are not sent to a server. A share link contains the inputs you choose to share, so check it before sending it to anyone.