Free embed

Concrete Slab Calculator

Estimate cubic yards, bags, waste, and a quick buying path for patios, pads, and flatwork.

Project inputs

Length (ft)Width (ft)Thickness (in)Waste (%)Bag sizeBag price (80 lb)

Concrete needed

1.36 yd3

80 lb bags

62 bags

Bag material

$326

Ready-mix screen

$620

1.23 yd3 before waste, 1.36 yd3 after waste.

Compare bags with ready-mix, mini-mix, or volumetric delivery before buying.

Use the full calculator for saved projects, local cost checks, and quote review.