How many bags of concrete in a cubic yard?

An 80-lb bag yields about 0.6 cubic feet, so it takes roughly 45 bags to make one cubic yard.

Should I order ready-mix or use bags?

For anything over about 1 cubic yard, ready-mix delivery is usually cheaper and faster than mixing bags by hand.

Concrete Calculator

Calculate how many cubic yards of concrete (and 80-lb bags) you need for a slab, plus the estimated cost. Build a shareable project estimate with quantities, local price, and a shopping list.

Length (ft)

Width (ft)

Depth (in)

Local price (per cuyd)

You need

1.78 cu yd

Estimated material cost $267

Area

144 sq ft

Volume

48.0 cu ft

80-lb bags

Material shopping list

Order about 1.78 cubic yards of concrete.
Budget about $267 before delivery, taxes, and labor.
Add 5–10% waste for uneven subgrade, cuts, settling, or spillage.

Formula & assumptions

Area = length x width. Volume = area x depth / 12. Cubic yards = cubic feet / 27. Cost = quantity x local unit price.

Default depth: 4 inches
Default price: $150 per cuyd
80-lb bags yield: 0.6 cu ft each

These assumptions make the estimate easy for search engines and AI answer tools to verify. Replace the default price with your supplier quote for a local estimate.

How to use

Enter your dimensions above and BuildTally instantly estimates the concrete you need and the material cost. Prices are national-average defaults — your local supplier quote may differ.

Common questions

How many bags of concrete in a cubic yard?: An 80-lb bag yields about 0.6 cubic feet, so it takes roughly 45 bags to make one cubic yard.
Should I order ready-mix or use bags?: For anything over about 1 cubic yard, ready-mix delivery is usually cheaper and faster than mixing bags by hand.

Estimate only. Confirm quantities with your supplier before ordering.