Concrete Mix Materials Calculator
Estimates each material by the volumetric method: enter the pour volume and mix ratio (e.g. 1:2:4) to get cement bags, sand, aggregate and mixing water. Dry volume factor 1.54.
Disclaimer：Results are produced by deterministic formulas and are intended for quantity estimating and option comparison only. A qualified engineer must verify them against the project specification, design documents and actual site conditions before use. The author accepts no liability for any loss arising from their use.
ASSUMPTIONS
RESULT
CALCULATION
METHOD
Volumetric method: dry volume
Vdry = Vwet × 1.54; each material volume is apportioned by its parts in the mix ratio; cement mass uses a density of 1440 kg/m³ and water demand is W = (W/C) × mcement.- Nominal volumetric ratios (1:2:4 and similar) are traditional empirical mixes, suitable only for general work and estimating.
- Structural concrete with strength and durability requirements must be proportioned by mix design testing (e.g. ACI 211 or the applicable national code) — nominal ratios cannot be applied directly.
- The dry volume factor of 1.54 depends on sand moisture content and aggregate grading; it is a common approximation only.
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