Concrete Calculator
Cubic meters of concrete for a slab, plus the typical 10% over-order to avoid a short pour.
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Cubic meters of concrete for a slab, plus the typical 10% over-order to avoid a short pour.
How to use Concrete Calculator
- Open the toolNo signup and nothing to install; it works as soon as the page loads.
- Set “Length (m)”
- Set “Width (m)”
- Set “Depth (m)”
- Read the resultChange any input and the result is recalculated immediately.
Worked example with the defaults
- CONCRETE VOLUME · 4 × 3 × 0.1 m
- 1.20 m³
Nothing you enter leaves your device
All of the work happens inside your browser. Whatever you type is never packaged up and sent to a server, and no request this page makes carries it.
That makes it safe for contract amounts, personal details and internal documents you would rather not hand to a third party — close the tab and it is gone.
What this tool does not do
Concrete Calculator only does what a browser can do on its own — it talks to no backend service. So it keeps no history for you and syncs nothing across devices; if you need a record, copy or download the result.
It is also not a substitute for professional judgement. For legal, medical or tax decisions, treat the output as a starting point rather than a final answer.
Frequently Asked Questions
- Ready-mix or bagged?
- For anything over about 0.5 m³ order ready-mix by the truck — bagging it yourself gets expensive fast below 1 m³.