KCalc.1 Cubic Meter Concrete Cement Sand Ratio
Quick ratio estimate for 1 m3 of concrete with cement, sand, and aggregate volumes.
A common nominal mix for general concrete work is 1:2:4 (cement : sand : aggregate) by volume. Your mix ratio may vary by strength or local standard.
Quick estimate (1:2:4): For 1 m3 concrete, cement is about 6.3 bags (50 kg), sand 0.44 m3, aggregate 0.88 m3.
How the estimate works
Concrete mixes are measured on dry volume. A typical dry volume factor is 1.54.
Formula
Dry volume = 1.54 x wet volume Component volume = (ratio / total ratio) x dry volume Cement bags = cement volume / bag yield
Bag yield depends on bag size. A 50 kg bag is about 0.035 m3 of cement.
Use the calculators below for an exact result based on your mix, bag size, and density.