Convert Grams per hour to Grains per second
Convert Grams per hour (g/h) to Grains per second (gr/s) instantly and accurately.
Conversion Formula
gr/s = g/h × 0.004286766209
About Grams per hour
The gram per hour (g/h) equals 10⁻³/3600 ≈ 2.778×10⁻⁷ kg/s, used in fuel-cell hydrogen consumption tests, precision agricultural sprayers, and humidity calibration. A 1 kW PEM fuel cell consumes roughly 750 g/h of hydrogen at rated power. Automotive air-conditioning refrigerant leak standards are set in g/h. 1 g/h ≈ 2.778×10⁻⁷ kg/s = 1/3600 g/s.
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
| Grams per hour (g/h) | Grains per second (gr/s) |
|---|---|
| 1 g/h | 0.00428677 gr/s |
| 2 g/h | 0.00857353 gr/s |
| 5 g/h | 0.0214338 gr/s |
| 10 g/h | 0.0428677 gr/s |
| 25 g/h | 0.107169 gr/s |
| 50 g/h | 0.214338 gr/s |
| 100 g/h | 0.428677 gr/s |