Convert Pounds per day to Pounds per minute
Convert Pounds per day (lb/d) to Pounds per minute (lb/min) instantly and accurately.
Conversion Formula
lb/min = lb/d × 0.0006944444444
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 Pounds per minute
The pound per minute (lb/min) equals 0.45359237/60 ≈ 7.560×10⁻³ kg/s, the standard unit for US fire-suppression system design (sprinkler flow demand) and HVAC hydronic loop balancing. A fire-sprinkler head at 15 psi discharges roughly 30-40 lb/min of water; industrial humidifiers are rated in lb/min of steam. 1 lb/min ≈ 7.560×10⁻³ kg/s = 60 lb/h.
Quick Reference Table
| Pounds per day (lb/d) | Pounds per minute (lb/min) |
|---|---|
| 1 lb/d | 0.000694444 lb/min |
| 2 lb/d | 0.00138889 lb/min |
| 5 lb/d | 0.00347222 lb/min |
| 10 lb/d | 0.00694444 lb/min |
| 25 lb/d | 0.0173611 lb/min |
| 50 lb/d | 0.0347222 lb/min |
| 100 lb/d | 0.0694444 lb/min |