Concrete Conversion Chart
Everything you need to move between the units used in concrete work: cubic yards, cubic feet, cubic meters, inches, millimeters, square feet and pounds. Factors come from the NIST Guide to the SI.
Volume
| From | To | Multiply by |
|---|---|---|
| yd³ | ft³ | 27 |
| yd³ | m³ | 0.764555 |
| yd³ | litres | 764.555 |
| ft³ | yd³ | 0.037037 |
| ft³ | m³ | 0.0283168 |
| m³ | yd³ | 1.30795 |
| m³ | ft³ | 35.3147 |
| m³ | litres | 1,000 |
Length
| From | To | Multiply by |
|---|---|---|
| in | ft | 0.083333 (÷ 12) |
| in | mm | 25.4 |
| in | cm | 2.54 |
| ft | m | 0.3048 |
| yd | ft | 3 |
| yd | m | 0.9144 |
| m | ft | 3.28084 |
| mm | in | 0.0393701 |
Inch fractions are common on site: 1/8 in = 0.125, 1/4 in = 0.25, 3/8 in = 0.375, 1/2 in = 0.5, 5/8 in = 0.625, 3/4 in = 0.75.
Area and weight
| From | To | Multiply by |
|---|---|---|
| ft² | m² | 0.092903 |
| m² | ft² | 10.7639 |
| yd² | ft² | 9 |
| lb | kg | 0.453592 |
| kg | lb | 2.20462 |
| US ton | lb | 2,000 |
| metric tonne | kg | 1,000 |
| lb/ft³ | kg/m³ | 16.0185 |
Thickness to coverage
| Thickness | ft² per yd³ | m² per m³ |
|---|---|---|
| 2 in (50.8 mm) | 162.0 | 19.69 |
| 3 in (76.2 mm) | 108.0 | 13.12 |
| 4 in (100 mm) | 81.0 | 10.00 |
| 5 in (125 mm) | 64.8 | 8.00 |
| 6 in (150 mm) | 54.0 | 6.67 |
| 8 in (200 mm) | 40.5 | 5.00 |
Use the cubic meter calculator or the yards calculator for the conversion in the right context.
Bag yields
| Bag | Yield (ft³) | Yield (L) | Yield (m³) |
|---|---|---|---|
| 80 lb | 0.6 | 17.0 | 0.0170 |
| 60 lb | 0.45 | 12.7 | 0.0127 |
| 50 lb | 0.375 | 10.6 | 0.0106 |
| 40 lb | 0.3 | 8.5 | 0.0085 |
Frequently asked questions
How many cubic feet are in a cubic yard?
27.
How many cubic meters are in a cubic yard?
0.764555.
How many mm in an inch?
25.4.
How do I convert pounds to kilograms?
Multiply by 0.453592.
How many square feet in a square meter?
10.7639.
What is the weight of concrete in kg/m³?
About 2,400 kg/m³, which is 150 lb/ft³.
Sources
Estimate only. Results depend on the numbers you enter, ground conditions and your supplier. For structural work consult a licensed engineer and follow local codes. Brand names such as Quikrete and Sakrete are used only to cite published product data. This site is not affiliated with any brand.