Convert Pounds per minute to Grains per second
Convert Pounds per minute (lb/min) to Grains per second (gr/s) instantly and accurately.
Conversion Formula
gr/s = lb/min × 116.6666667
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 second
The grain per second (gr/s) equals 64.79891 mg/s or 6.479891×10⁻⁵ kg/s. The grain (= 1/7000 lb exactly) is the smallest avoirdupois mass unit, still used in ballistics for bullet and propellant-charge weights. A .308 Winchester rifle bullet of 168 gr fired in 1 s represents 168 gr/s; powder charge is typically 40-46 gr. 1 gr/s = 6.479891×10⁻⁵ kg/s = 64.79891 mg/s.
Quick Reference Table
| Pounds per minute (lb/min) | Grains per second (gr/s) |
|---|---|
| 1 lb/min | 116.667 gr/s |
| 2 lb/min | 233.333 gr/s |
| 5 lb/min | 583.333 gr/s |
| 10 lb/min | 1166.67 gr/s |
| 25 lb/min | 2916.67 gr/s |
| 50 lb/min | 5833.33 gr/s |
| 100 lb/min | 11666.7 gr/s |