Concrete Estimation Calculator
For a slab or footing, "width" is the second side and "thickness" is the depth. For a wall, use wall length, wall height as width, and wall thickness.
For a slab or footing, "width" is the second side and "thickness" is the depth. For a wall, use wall length, wall height as width, and wall thickness.
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Enter length, width and thickness to see quantities
Dry volume is taken as 1.54 × wet volume (standard allowance for bulking of sand and voids between aggregate, plus a small wastage margin). Cement bags are calculated at 50 kg per bag; sand and aggregate weights use typical bulk densities (1,600 kg/m³ and 1,500 kg/m³). Actual quantities on site vary with material source, compaction and wastage — use this as a planning estimate, not a final order quantity.