Concrete Volume Calculator (Slab)
Cubic metres / yards of concrete for a slab, with 5% waste included.
Always order 5–10% over the geometry — sub-base undulation eats concrete silently. A transit mixer carries 6–7 m³; plan pours in full-truck multiples.
Formula
Concrete Volume Calculator (Slab) is a free concrete calculator for civil engineers, contractors and quantity surveyors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Concrete Volume Calculator (Slab)
Cubic metres / yards of concrete for a slab, with 5% waste included. The calculation implements V = L × W × t × 1.05 waste (Estimating practice; IS 456 cover/thickness minima). Always order 5–10% over the geometry — sub-base undulation eats concrete silently. A transit mixer carries 6–7 m³; plan pours in full-truck multiples.
How to use Concrete Volume Calculator (Slab)
- 1Enter Length in m.
- 2Enter Width in m.
- 3Enter Thickness in mm.
- 4Read Volume (with 5% waste), Approx. weight instantly — no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Concrete Volume Calculator (Slab)?
- ✓Implements the standard formula — V = L × W × t × 1.05 waste
- ✓Reference cited on-page: Estimating practice; IS 456 cover/thickness minima
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Concrete Volume Calculator (Slab) use?+
It computes V = L × W × t × 1.05 waste, per Estimating practice; IS 456 cover/thickness minima. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Always order 5–10% over the geometry — sub-base undulation eats concrete silently. A transit mixer carries 6–7 m³; plan pours in full-truck multiples.
Does it include wastage?+
Yes — standard wastage/bulking factors are built in and stated in the formula line, so the quantity is an orderable number, not a bare geometric volume.
Is the Concrete Volume Calculator (Slab) free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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