Construction • Concrete

Concrete Volume & Sizing Calculators

Structural concrete volume calculations, standard mix quantities, and wastage margins for slabs, footings, and columns.

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Calculate total concrete volume and pre-mixed bag quantities for slabs, footings, and curbs.

V = L × W × H · V_ready = V × (1 + wastage/100) · Bags = ceil(V_ready / 0.033)

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Determine rectangular and irregular slab volumes with wastage margins.

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Calculate concrete required for spread (pad) footings and strip footings, per-footing and total volumes with ready-mix allowance.

V = L × W × D × n · V_ready = V_total × (1 + wastage/100)

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Accurate concrete requirements for round, square, and rectangular structural columns.

V = A × H × n · A = (π/4)d² round, b×b square, w×d rectangular

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Compute per-batch and per-cubic-meter quantities of cement, sand, aggregate, and water from a mix ratio.

V_dry = V × 1.54 · M_mat = V_dry × (ratio / Σ ratios) · Water = w/c × cement mass