5 calculation of sand quantity how to calculate cement sand quantity in 16 mortar given dataassume volume of mortar 1m3 density of cement 1440 kgm3 cement in 1 bag 50 kg 1m3 3532 cubic feet mix ratio is 16 one part is cement and 6 part is sand total proportion 16 7 part of cement 17 part of sand 67.