Convert Pounds per day to Metric tons per second
Convert Pounds per day (lb/d) to Metric tons per second (t/s) instantly and accurately.
Conversion Formula
t/s = lb/d × 5.249911690e-9
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 Metric tons per second
The metric tonne per second (t/s) equals 1 000 kg/s, the largest commonly cited mass-flow unit for catastrophic events and mega-scale engineering. The Chicxulub impactor released energy equivalent to removing ≈7×10¹¹ t of TNT over milliseconds; large submarine volcanic eruptions expel lava at 10³-10⁴ t/s. Industrial context: the Three Gorges Dam passes ≈45 000 m³/s of water = ≈45 000 t/s at peak flood. 1 t/s = 1 000 kg/s ≈ 1.102 short ton/s.
Quick Reference Table
| Pounds per day (lb/d) | Metric tons per second (t/s) |
|---|---|
| 1 lb/d | 5.25 × 10-9 t/s |
| 2 lb/d | 1.05 × 10-8 t/s |
| 5 lb/d | 2.625 × 10-8 t/s |
| 10 lb/d | 5.25 × 10-8 t/s |
| 25 lb/d | 1.312 × 10-7 t/s |
| 50 lb/d | 2.625 × 10-7 t/s |
| 100 lb/d | 5.25 × 10-7 t/s |