Concrete Mix Calculator

Calculate cement, sand, gravel, and water quantities for a concrete pour from volume and mix ratio (e.g. 1:2:4). Supports cubic meters and cubic feet. Runs locally in your browser.

Volume needed

total concrete volume

Volume unit

Cement ratio

parts cement

Sand ratio

parts sand

Gravel ratio

parts gravel

Water/cement ratio

w/c ratio (0.4–0.6 typical)

Enter volume and mix ratios.

Dry volume = wet volume × 1.54 (shrinkage factor). Cement = dryVol × cementPart / totalParts. Water = cement × w/c ratio. Runs locally — nothing leaves your browser.