Convert Hoppus feet to Cubic feet
Convert Hoppus feet (H ft) to Cubic feet (ft³) instantly and accurately.
Conversion Formula
ft³ = H ft × 0.7853981634
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 Cubic feet
The cubic foot (ft³) = 0.028316846592 m³ (exact) - the primary US lumber volume unit for large structural timber; also underlies the cord (128 ft³) and board foot (1 bf = 1/12 ft³ nominal). US Forest Service sale contracts specify cruise volumes in Mbf or ft³. Export docs for EU/Asia convert to m³: 1 m³ = 35.315 ft³. 1 ft³ = 0.02832 m³ = 1,728 in³ ≈ 12 bf.
Quick Reference Table
| Hoppus feet (H ft) | Cubic feet (ft³) |
|---|---|
| 1 H ft | 0.785398 ft³ |
| 2 H ft | 1.5708 ft³ |
| 5 H ft | 3.92699 ft³ |
| 10 H ft | 7.85398 ft³ |
| 25 H ft | 19.635 ft³ |
| 50 H ft | 39.2699 ft³ |
| 100 H ft | 78.5398 ft³ |