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Concrete slab calculator: volume, mix and cost
Enter the slab dimensions to estimate concrete volume, ingredients, bags and cost. All assumptions remain editable.
Common project examplesChoose a similar project, then adjust the measurements.
1. Define the slab
Enter actual dimensions. Any thickness suggested by an example remains indicative.
Area dimensionsChoose a starting shape, then enter dimensions directly on the plan.
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2. Allow for site variations
The allowance covers small base variations and placement losses.
Indicative mix composition
Indicative mix composition
The mix is expressed per 1 m³ of concrete. Adjust it to the mix design selected for your project.
These doses are editable assumptions, not an approved structural mix design. For load-bearing work, follow the project specification and supplier or professional advice.
Packaging and prices (optional)
3. Choose how to source the concrete
Prices below are editable indicative assumptions. Delivery and packaging can substantially change the total.
This bag count is for cement only. Sand, aggregate and water must still be supplied separately.
Next step
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