Convert Grains per second to Grains per hour
Convert Grains per second (gr/s) to Grains per hour (gr/h) instantly and accurately.
Conversion Formula
gr/h = gr/s × 3600
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 Grains per hour
The grain per hour (gr/h) equals 6.479891×10⁻⁵/3600 ≈ 1.800×10⁻⁸ kg/s, used in HVAC psychrometric calculations for dehumidifier capacity and moisture-removal rates. ASHRAE load calculation spreadsheets report latent loads in grains of water per hour; a typical residential dehumidifier removes 5×10⁵-2×10⁶ gr/h. 1 gr/h ≈ 1.800×10⁻⁸ kg/s.
Quick Reference Table
| Grains per second (gr/s) | Grains per hour (gr/h) |
|---|---|
| 1 gr/s | 3600 gr/h |
| 2 gr/s | 7200 gr/h |
| 5 gr/s | 18000 gr/h |
| 10 gr/s | 36000 gr/h |
| 25 gr/s | 90000 gr/h |
| 50 gr/s | 180000 gr/h |
| 100 gr/s | 360000 gr/h |