Convert Pounds per day to Pounds per second
Convert Pounds per day (lb/d) to Pounds per second (lb/s) instantly and accurately.
Conversion Formula
lb/s = lb/d × 1.157407407e-5
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 second
The pound per second (lb/s) equals 0.45359237 kg/s, widely used in aerospace and large industrial equipment. A Saturn V first-stage engine consumed ≈13 short tons of propellant per second, equal to ≈26 000 lb/s; a typical large centrifugal pump handling water moves ≈500-2000 lb/s at operating flow. 1 lb/s = 0.45359237 kg/s ≈ 3 600 lb/h.
Quick Reference Table
| Pounds per day (lb/d) | Pounds per second (lb/s) |
|---|---|
| 1 lb/d | 1.157 × 10-5 lb/s |
| 2 lb/d | 2.315 × 10-5 lb/s |
| 5 lb/d | 5.787 × 10-5 lb/s |
| 10 lb/d | 0.000115741 lb/s |
| 25 lb/d | 0.000289352 lb/s |
| 50 lb/d | 0.000578704 lb/s |
| 100 lb/d | 0.00115741 lb/s |