How to use this calculator
- Enter the cubic feet value. Type the volume you want to convert. Decimals are fine.
- Read the cubic yards. The primary result is in yd³. The secondary stats give the same volume in m³ and liters for cross-checking metric quotes.
- Order in yards. Concrete trucks, ready-mix suppliers, and bulk landscape materials are nearly always priced and delivered by the cubic yard.
Formula
Cubic Yards = Cubic Feet ÷ 27
Worked example
108 cubic feet ÷ 27 = 4 cubic yards. That is the volume of a 12 ft × 12 ft slab poured 9 inches thick — typical for a small concrete pad with structural depth.
Common project sizes
Quick reference for the most common cubic feet to cubic yards calculator use cases. Use these as a sanity check on your calculator inputs.
| Project | Dimensions | Result |
|---|---|---|
| 4 in slab, 10×10 ft | 33.3 ft³ | 1.23 yd³ |
| 4 in slab, 20×20 ft | 133 ft³ | 4.94 yd³ |
| 6 in slab, 10×10 ft | 50 ft³ | 1.85 yd³ |
| 4 ft fence post hole (12 in dia) | 3.14 ft³ | 0.116 yd³ |
Tips for accurate results
- A cubic yard is 27 cubic feet because a yard is 3 ft and 3³ = 27 — not because of a fudge factor.
- Round up when ordering ready-mix concrete: short-load fees ($60–$150) cost more than the wasted concrete.
- For loose materials (mulch, gravel, topsoil), volume shrinks 10–15% after settling. Order extra.
- When converting from a tape measure that gives you length × width × depth in feet, multiply first, then divide by 27 once at the end — fewer rounding errors.