Concrete and cement calculator

Find cement bags, sand and aggregate for a slab, footing or column from its size and concrete grade.

How it works

Dry volume is taken as 1.54 times the wet volume. Cement, sand and aggregate follow the grade ratio (M10 1:3:6, M15 1:2:4, M20 1:1.5:3, M25 1:1:2). A 50 kg bag of cement is taken as 0.0347 m³. For structural work, follow your engineer's mix design.

Always confirm measurements for a purchase or registration with official records.

Questions people ask

How much concrete does a 12 × 10 ft slab of 5 inches need?

12 × 10 × (5 ÷ 12) = 50 cft, which is about 1.42 m³. Use the calculator for cement and sand.

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