Convert Hoppus feet to Board feet
Convert Hoppus feet (H ft) to Board feet (bf) instantly and accurately.
Conversion Formula
bf = H ft × 9.424777961
About Hoppus feet
The Hoppus foot (H ft) is a British-Commonwealth round-log unit devised by Edward Hoppus (1736): V(H ft) = (girth/4 in)² × length/ft, yielding Ο€/4 of the true cylindrical volume ≈ 78.54% - the usable square-sawn fraction. Replaced by m³ in UK trade (1963) but still used in Sri Lanka, Malaysia, Myanmar, and Bangladesh. 1 H ft = Ο€/4 ft³ ≈ 0.02224 m³.
About Board feet
The board foot (bf) is the standard lumber-trade unit in the USA, Canada, and the Philippines: 1 ft × 1 ft × 1 in = 144 in³ = 0.002359737216 m³ (exact). Always calculated from nominal dimensions - a 1×6×8 ft board = 4 bf nominal, actual dressed volume is less. Hardwood lumber priced from ~$2/bf (common poplar) to $100+/bf (premium walnut). Log rules: Doyle (SE USA), Scribner (Pacific NW), International ΒΌ-inch (most accurate). 1 bf = 144 in³ = 0.00236 m³ ≈ 1/12 ft³.
Quick Reference Table
| Hoppus feet (H ft) | Board feet (bf) |
|---|---|
| 1 H ft | 9.42478 bf |
| 2 H ft | 18.8496 bf |
| 5 H ft | 47.1239 bf |
| 10 H ft | 94.2478 bf |
| 25 H ft | 235.619 bf |
| 50 H ft | 471.239 bf |
| 100 H ft | 942.478 bf |