Convert Pounds per minute to Grains per minute
Convert Pounds per minute (lb/min) to Grains per minute (gr/min) instantly and accurately.
Conversion Formula
gr/min = lb/min × 7000
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.
About Grains per minute
The grain per minute (gr/min) equals 6.479891×10⁻⁵/60 ≈ 1.080×10⁻⁶ kg/s. This unit appears in HVAC humidity engineering: moisture added or removed from conditioned air is traditionally expressed in grains of water per pound of dry air per minute in US practice. A whole-house humidifier may evaporate 300-600 gr/min at design load. 1 gr/min ≈ 1.080×10⁻⁶ kg/s.
Quick Reference Table
| Pounds per minute (lb/min) | Grains per minute (gr/min) |
|---|---|
| 1 lb/min | 7000 gr/min |
| 2 lb/min | 14000 gr/min |
| 5 lb/min | 35000 gr/min |
| 10 lb/min | 70000 gr/min |
| 25 lb/min | 175000 gr/min |
| 50 lb/min | 350000 gr/min |
| 100 lb/min | 700000 gr/min |