Square Feet to Cubic Yards
Cubic yards equal square feet × depth in inches ÷ 324. Enter the area and depth below, or switch direction to see how many square feet a cubic yard covers.
Enter a number, like 2.5
- Cubic yards
- 3.7 yd³
- To order
- 3.75 yd³ (next ¼ yard up)
- Cubic feet
- 100 ft³
How to convert square feet to cubic yards
Square feet convert to cubic yards by multiplying by the depth in inches and dividing by 324.
ft² × Din ÷ 324 = yd³
324 is 27 cubic feet × 12 inches: one cubic yard spread 1 inch deep covers 324 square feet. Example: 400 ft² at 3 in = 400 × 3 ÷ 324 = 3.7 yd³.
Cubic yard coverage by depth
One cubic yard covers 324 square feet at 1 inch, and half as much each time the depth doubles.
| Depth | Square feet per cubic yard |
|---|---|
| 1 in | 324 ft² |
| 2 in | 162 ft² |
| 3 in | 108 ft² |
| 4 in | 81 ft² |
| 6 in | 54 ft² |
| 8 in | 41 ft² |
| 12 in | 27 ft² |
At 3 inches, one cubic yard covers 108 ft², the usual depth for a mulch calculator job. Topsoil and gravel need more depth: calculate cubic yards with the material picked, to get tons too.
Square feet to cubic yards FAQ
- How many square feet does a cubic yard cover at 3 inches?
- One cubic yard covers 108 square feet at 3 inches deep (324 ÷ 3).