Square feet to cubic yards calculator
Square feet measure area and cubic yards measure volume, so the conversion needs a depth: 100 sq ft at 3 inches deep is 0.93 cubic yards, and one cubic yard covers 108 sq ft at that depth.
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An area of 100 sq ft covered 3 inches deep needs 0.93 cubic yards.
- Cubic yards
- 0.93
- Cubic feet
- 25
- Rounded up to the next half yard
- 1 yd³
How it is calculated
- Area = 100 sq ft as entered.
- Volume = 100 sq ft × 3 in ÷ 12 = 25 cu ft.
- Cubic yards = 25 ÷ 27 = 0.926 yd³.
How to convert square feet to cubic yards
Square feet are an area, so the conversion needs a depth. The worked numbers use the calculator's defaults: 100 sq ft at 3 inches deep.
Step 1: cubic feet from square feet and depth
Cubic feet = square feet × depth in inches ÷ 12
Example 100 × 3 ÷ 12 = 25 cu ft
Step 2: cubic yards from cubic feet
Cubic yards = cubic feet ÷ 27
Example 25 ÷ 27 = 0.926 yd³
Step 3: the one-line shortcut
Cubic yards = square feet × depth in inches ÷ 324
324 = 27 cubic feet × 12 inches: the square feet one cubic yard covers at 1 inch deep
Example 100 × 3 ÷ 324 = 0.926 yd³
Step 4: area one cubic yard covers
Square feet covered = cubic yards × 324 ÷ depth in inches
Example 1 × 324 ÷ 3 = 108 sq ft
Doubling the depth halves the area a yard covers.
How many square feet does a cubic yard cover?
| Depth, in | 1 cubic yard covers, sq ft | Cubic yards for 100 sq ft | Cubic yards for 1,000 sq ft |
|---|---|---|---|
| 1 | 324 | 0.31 | 3.09 |
| 2 | 162 | 0.62 | 6.17 |
| 3 | 108 | 0.93 | 9.26 |
| 4 | 81 | 1.23 | 12.35 |
| 5 | 64.8 | 1.54 | 15.43 |
| 6 | 54 | 1.85 | 18.52 |
| 8 | 40.5 | 2.47 | 24.69 |
| 10 | 32.4 | 3.09 | 30.86 |
| 12 | 27 | 3.7 | 37.04 |