Concrete Calculator
Estimate cubic feet and cubic yards of concrete needed for a rectangular slab.
Concrete needed
0.00 yd³
Cubic feet0.00 ft³
Including waste0.00 yd³
How much concrete do you need?
Multiply length by width by thickness to find cubic feet, then divide by 27 to convert cubic feet to cubic yards. Ordering a little extra helps cover spillage, uneven subgrade and measurement errors.