Concrete Calculator

Estimate how much concrete a slab or column needs — in cubic yards, cubic meters, and ready-mix bags.

Dimensions

Length (ft)

Width (ft)

Thickness (in)

Quantity

Result

Enter the dimensions and press Calculate.

Ordering tip

Concrete never pours perfectly — forms flex and ground is uneven — so order 5–10% more than the computed volume. Bag counts assume standard yields of 0.45 ft³ per 60 lb bag and 0.60 ft³ per 80 lb bag.