Convert Pounds per day to Kilograms per day
Convert Pounds per day (lb/d) to Kilograms per day (kg/d) instantly and accurately.
Conversion Formula
kg/d = lb/d × 0.45359237
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 Kilograms per day
The kilogram per day (kg/d) equals 1/86400 ≈ 1.157×10⁻⁵ kg/s, standard in environmental engineering for pollutant load calculations and water-treatment material dosing. Activated-carbon dosing for a water-treatment plant, sludge dewatering output, and river sediment transport surveys all use kg/d. A medium river in flood may move 10 000-100 000 kg/d of suspended solids. 1 kg/d ≈ 1.157×10⁻⁵ kg/s.
Quick Reference Table
| Pounds per day (lb/d) | Kilograms per day (kg/d) |
|---|---|
| 1 lb/d | 0.453592 kg/d |
| 2 lb/d | 0.907185 kg/d |
| 5 lb/d | 2.26796 kg/d |
| 10 lb/d | 4.53592 kg/d |
| 25 lb/d | 11.3398 kg/d |
| 50 lb/d | 22.6796 kg/d |
| 100 lb/d | 45.3592 kg/d |