Convert Petrograd standards to Hoppus tons
Convert Petrograd standards (Pet. std) to Hoppus tons (H ton) instantly and accurately.
Conversion Formula
H ton = Pet. std × 4.201690498
About Petrograd standards
The Petrograd standard (St Petersburg standard) = 165 ft³ = 4.6723 m³, representing 120 pieces of dressed Baltic softwood 12 ft × 11 in × 1.5 in = 165 ft³ exactly. Dominated 18th-19th century Baltic-to-Britain sawn-timber export trade from St Petersburg, Riga, and Danzig. Replaced by m³ in UK trade during 1970s metrication. 1 Petrograd standard = 165 ft³ = 4.6723 m³ ≈ 1,980 bf.
About Hoppus tons
The Hoppus ton (H ton) = 50 Hoppus feet = 50 × (Ο€/4) ft³ ≈ 1.112 m³. The '50' approximated one ton of tropical hardwood by weight (teak/mahogany at 700-900 kg/m³ × 1.112 m³ ≈ 0.9 metric ton). Standard for British colonial timber imports - teak from Burma, iroko from West Africa, meranti from SE Asia. Superseded by m³ after metrication. 1 H ton = 50 H ft ≈ 1.112 m³.
Quick Reference Table
| Petrograd standards (Pet. std) | Hoppus tons (H ton) |
|---|---|
| 1 Pet. std | 4.20169 H ton |
| 2 Pet. std | 8.40338 H ton |
| 5 Pet. std | 21.0085 H ton |
| 10 Pet. std | 42.0169 H ton |
| 25 Pet. std | 105.042 H ton |
| 50 Pet. std | 210.085 H ton |
| 100 Pet. std | 420.169 H ton |