Convert Pounds per day to Long tons per day
Convert Pounds per day (lb/d) to Long tons per day (long ton/d) instantly and accurately.
Conversion Formula
long ton/d = lb/d × 0.0004464285714
About Pounds per day
The pound per day (lb/d) equals 0.45359237/86400 ≈ 5.249×10⁻⁶ kg/s, used in wastewater engineering for reporting biochemical oxygen demand (BOD) loads, nutrient loadings, and sludge production. US NPDES permits set effluent mass-load limits in lb/d; a municipal WWTP serving 10 000 people generates roughly 1 500-3 000 lb/d of dry sludge solids. 1 lb/d ≈ 5.249×10⁻⁶ kg/s.
About Long tons per day
The long ton per day (long ton/d) equals 1 016.0469088/86400 ≈ 0.011760 kg/s, used in legacy British mining reports for daily colliery output and in Naval fuel-consumption logs. Historic British Admiralty fuel expenditure tables for Royal Navy warships used long ton/d for bunker coal or oil consumption at various speeds. 1 long ton/d ≈ 0.011760 kg/s ≈ 1.016 t/d.
Quick Reference Table
| Pounds per day (lb/d) | Long tons per day (long ton/d) |
|---|---|
| 1 lb/d | 0.000446429 long ton/d |
| 2 lb/d | 0.000892857 long ton/d |
| 5 lb/d | 0.00223214 long ton/d |
| 10 lb/d | 0.00446429 long ton/d |
| 25 lb/d | 0.0111607 long ton/d |
| 50 lb/d | 0.0223214 long ton/d |
| 100 lb/d | 0.0446429 long ton/d |