Concrete calculator: bags
Short answer
One cubic yard of concrete takes about 45 80-lb bags, 60 60-lb bags, or 90 40-lb bags. Pick a slab size below, or enter exact dimensions in the calculator.
Bags per cubic yard
| Bag size | Bags per yard |
|---|---|
| 80-lb | 45 |
| 60-lb | 60 |
| 50-lb | 72 |
| 40-lb | 90 |
Bags by slab size
Your exact size
Open the concrete calculatorFrequently asked questions
How many bags of concrete are in a cubic yard?
About 45 80-lb bags, 60 60-lb bags, or 90 40-lb bags make one cubic yard (27 cubic feet). Above roughly one yard it is usually cheaper to order ready-mix.
How many bags of concrete for a 10x10 slab?
A 10 × 10 ft slab at 4" thick takes about 62 80-lb, 82 60-lb, or 123 40-lb bags (including 10% waste). Enter your size for an exact count.
What size concrete bag should I buy?
80-lb bags need the fewest trips and mixing; 40- and 60-lb bags are lighter to handle. The total concrete is the same — pick by how much weight you want to lift.