Concrete Calculator
Calculate cubic yards of concrete needed for slabs, footings, walls, columns, and stairs. Includes waste factor and bag estimation.
Shape
Dimensions
Waste Factor
% extra material for waste
Formulas Used
Slab / Footing / Wall: Volume = L(ft) x W(ft) x D(in) x 144 / 46,656 cubic yards
Column: Volume = pi x r^2 x H(ft) x 12 / 46,656 cubic yards
60 lb bag: ~0.45 cubic feet coverage
80 lb bag: ~0.6 cubic feet coverage