Concrete Estimating

The concrete volume formulas you need for any slab: length by width by thickness, converted to cubic feet and cubic yards, with a worked example.

How many 80, 60, 50, and 40-lb bags of concrete you need per cubic yard, with a worked example for a 10×10 slab at 4 inches thick.

Why a 10% waste factor is standard on every concrete order, and how subgrade unevenness and form bulging can leave you short otherwise.

How to estimate concrete finishing labor cost — per-square-foot and per-crew-hour rates for a standard 3-to-4 person flatwork crew.