Concrete Driveway Calculator

About this calculator

Concrete for a slab is ordered by the cubic yard in the US, calculated as length × width × thickness (converted to yards) with a waste allowance added — typically 5-10% — to cover spillage, uneven subgrade, and the ready-mix truck's minimum load. Driveway thickness usually runs 4 inches for cars and light trucks, stepped up to 5-6 inches where heavier vehicles like RVs or delivery trucks will park, since thickness has an outsized effect on both the load capacity and the volume ordered.

This calculator takes your driveway's length, width and thickness along with a price per cubic yard, and returns the concrete volume needed plus an estimated total cost for the pour. Homeowners planning a driveway replacement, DIYers comparing self-pour costs to a contractor's quote, and concrete contractors sizing a ready-mix order use it to avoid ordering short (forcing an expensive emergency top-up truck) or over-ordering and paying for wasted concrete.