Convert Cords to Petrograd standards
Convert Cords (cord) to Petrograd standards (Pet. std) instantly and accurately.
Conversion Formula
Pet. std = cord × 0.7757575758
About Cords
The cord is the standard North American firewood/pulpwood unit = 4 ft × 4 ft × 8 ft stacked = 128 ft³ = 3.6246 m³ (exact). NIST Handbook 44 requires all US firewood to be sold in cords or legal fractions. Seasoned split hardwood ≈ 20-24 million BTU/cord; air-dry pine ≈ 15-18 million BTU/cord. 'Face cord' or 'rick' is NOT a legal unit. 1 cord = 128 ft³ = 3.6246 m³ = 8 cord feet.
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.
Quick Reference Table
| Cords (cord) | Petrograd standards (Pet. std) |
|---|---|
| 1 cord | 0.775758 Pet. std |
| 2 cord | 1.55152 Pet. std |
| 5 cord | 3.87879 Pet. std |
| 10 cord | 7.75758 Pet. std |
| 25 cord | 19.3939 Pet. std |
| 50 cord | 38.7879 Pet. std |
| 100 cord | 77.5758 Pet. std |