Convert Grains per second to Pounds per hour
Convert Grains per second (gr/s) to Pounds per hour (lb/h) instantly and accurately.
Conversion Formula
lb/h = gr/s × 0.5142857143
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.
About Pounds per hour
The pound per hour (lb/h) equals 0.45359237/3600 ≈ 1.260×10⁻⁴ kg/s, the dominant unit in US process engineering and steam-boiler rating. Packaged steam boilers are rated in lb/h of steam output (typical range 100-2 000 lb/h); HVAC cooling-coil latent loads are calculated in lb/h of moisture; flue-gas emission inventories are reported in lb/h per stack. 1 lb/h ≈ 1.260×10⁻⁴ kg/s.
Quick Reference Table
| Grains per second (gr/s) | Pounds per hour (lb/h) |
|---|---|
| 1 gr/s | 0.514286 lb/h |
| 2 gr/s | 1.02857 lb/h |
| 5 gr/s | 2.57143 lb/h |
| 10 gr/s | 5.14286 lb/h |
| 25 gr/s | 12.8571 lb/h |
| 50 gr/s | 25.7143 lb/h |
| 100 gr/s | 51.4286 lb/h |