Estimate how much concrete you need for a slab, footing, wall or circular area.
Use the same measurement unit for every dimension. The calculator converts the final result automatically.
Concrete quantities are estimates. Actual requirements can vary due to uneven ground, spillage, compaction and product mix. The bag estimate assumes approximately 12.5 litres of mixed concrete per 25 kg bag; always check the yield stated on the product packaging.
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