Concrete is measured in cubic feet for bags, cubic yards for ready-mix in the United States and cubic meters almost everywhere else. One cubic yard is 27 cubic feet, or 0.765 cubic meters.
Volume
| From | To | Multiply by |
|---|---|---|
| Cubic feet | Cubic yards | 0.037 (or divide by 27) |
| Cubic yards | Cubic feet | 27 |
| Cubic yards | Cubic meters | 0.765 |
| Cubic meters | Cubic yards | 1.308 |
| Cubic meters | Cubic feet | 35.31 |
| Cubic feet | Cubic meters | 0.0283 |
Inches to feet
Thickness is usually given in inches, but the volume formula needs feet.
| Inches | Feet |
|---|---|
| 3 in | 0.250 ft |
| 3.5 in | 0.292 ft |
| 4 in | 0.333 ft |
| 5 in | 0.417 ft |
| 6 in | 0.500 ft |
| 8 in | 0.667 ft |
| 10 in | 0.833 ft |
| 12 in | 1.000 ft |
Area covered by one cubic yard
| Thickness | Square feet per cubic yard |
|---|---|
| 3 in | 108 |
| 4 in | 81 |
| 5 in | 64.8 |
| 6 in | 54 |
| 8 in | 40.5 |
Bags
| Bag | Cubic feet | Cubic yards | Bags per yard |
|---|---|---|---|
| 40 lb | 0.30 | 0.011 | 90 |
| 50 lb | 0.375 | 0.014 | 72 |
| 60 lb | 0.45 | 0.017 | 60 |
| 80 lb | 0.60 | 0.022 | 45 |
Weight
Normal-weight concrete is about 150 lb per cubic foot, 4,050 lb per cubic yard and 2,400 kg per cubic meter.
The concrete calculator accepts feet, inches, yards, meters and centimeters in any combination, so you rarely need to convert by hand.
Frequently asked questions
How many cubic feet are in a cubic yard?
27. A cubic yard is 3 ft × 3 ft × 3 ft.
How do I convert cubic feet to cubic yards?
Divide by 27. 54 cubic feet is 2 cubic yards.
How do I convert inches to feet for a concrete calculation?
Divide by 12. Four inches is 0.333 ft and six inches is 0.5 ft.
How many cubic yards are in a cubic meter?
1.308 cubic yards.