Concrete Calculator
Estimate concrete for three common jobs: a poured slab or footing, a raw volume for any shape, or a concrete block wall. Pick the type, enter the dimensions, and get volume, bags or trucks, and material counts.
Concrete is sold by the cubic yard for ready-mix delivery or by the bag for small pours. As a rule, anything past about one cubic yard is cheaper and easier to order by truck than to hand-mix. The block mode instead counts blocks and mortar for a masonry wall, which is handy for foundation and retaining work.
Estimate only. Order a little extra for spillage and uneven subgrade. Ready-mix trucks typically hold up to about 10 cubic yards.