How Much Concrete for a 10x10 Slab?

A 10×10 slab has 100 square feet of surface area. The amount of concrete you need depends primarily on the slab thickness.

Start with the ATHENA Concrete Calculator

Enter the length, width, and thickness in the ATHENA Concrete Calculator to calculate the volume and approximate bag quantity for your project.

10×10 slab at 4 inches thick

Four inches is a common planning thickness for many residential slab projects, but the required thickness depends on the intended use, site conditions, design, reinforcement, and applicable requirements.

At 4 inches, a 10×10 slab contains about 33.33 cubic feet of concrete, or about 1.23 cubic yards, before any allowance for waste or site conditions.

How the calculation works

Convert thickness from inches to feet, multiply length × width × thickness, then divide cubic feet by 27 to convert to cubic yards.

Cubic yards = length × width × thickness in feet ÷ 27

What about bags?

Bag quantities depend on the yield printed on the specific concrete mix. Different bag sizes and products produce different volumes, so use the calculator's bag estimate as a planning quantity and verify the product yield before purchasing.

Should I order extra?

A project can require additional material because of uneven subgrade, measurement variation, spillage, waste, or other site conditions. Confirm the final quantity with your supplier or contractor before placing a large order.

Related concrete guides

See How Much Concrete Do I Need?, How Many Bags of Concrete?, and Concrete Slab Calculator.

ATHENA calculator results are estimates for planning purposes and are not a substitute for project-specific engineering, supplier quantities, or professional advice.