Cubic Yards = (Length ft × Width ft × Depth ft) ÷ 27
Example: 100 ft long × 50 ft wide × 2 ft deep = 10,000 cubic feet ÷ 27 = 370 cubic yards
| Material | Swell % | BCY to LCY |
|---|---|---|
| Topsoil | 5-10% | Multiply by 1.05-1.10 |
| Clay | 20-30% | Multiply by 1.20-1.30 |
| Sand | 10-15% | Multiply by 1.10-1.15 |
| Rock | 50-60% | Multiply by 1.50-1.60 |
1 acre, 1 foot deep = ~160 cubic yards (rough rule of thumb)