The Bags of Concrete from Volume calculator computes the number of standards size bags of concreted needed to fill a volume (V)
INSTRUCTIONS: Choose the preferred units and enter the following:
Bags of Concrete (nB): The calculator returns the volume in cubic yards and number of bags of concreted to fill the volume.
A bag of concrete is sold by weight, but it has volume of concrete associated with it. An 80 pound bag creates 0.6 cubic feet of concrete. 60 lb bag creates 0.45 cubic feet, and a 40lb bag creates 0.3 cubic feet.
The formula for the number of bags of concrete is:
nB = V / BS
where: