concrete ratios

How Do You Find The Absolute Volume Of Concrete? The absolute volume of a 90-lb sample of the aggregate is: Absolute Volume = 90 lb / (2.65 x 62.4 lb/cu ft) = 0.544 cu ft. Water = 12 lb / (1 x 62.4 lb/cu ft) = 0.192 cu ft Total Volume = 1.229 cu ft.