Concrete Mix Ratio Calculator

Calculate volume ratios, cement bags, sand, gravel, and water quantities for standard concrete grades.

Mix Settings

Standard reinforced concrete (slabs, beams, columns)
WHAT IS THE DRY FACTOR?Dry concrete constituents shrink by about 30-35% when mixed with water and compacted. A standard 1.54 multiplier is applied to wet volume to estimate total dry ingredient volume needed.

Required Quantities / Output

Cement Bags (Rounded)14 bags(13.4 exact bags)
Dry Weight665 kg(1466 lbs)
Sand Required0.693 m³(1.11 Tons)24.47 ft³
Aggregates (Gravel)1.386 m³(2.49 Tons)48.95 ft³
Water Required299 Liters(79.0 US Gal)Approx W/C ratio = 0.45
Total concrete volume delivered (with wastage): 1.650 m³ (58.27 cubic feet). Dry ingredient bulk volume totals 2.541 m³.

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