Convert Milligrams per hour to Grains per second
Convert Milligrams per hour (mg/h) to Grains per second (gr/s) instantly and accurately.
Conversion Formula
gr/s = mg/h × 4.286766209e-6
About Milligrams per hour
The milligram per hour (mg/h) equals 10⁻⁶/3600 ≈ 2.778×10⁻¹⁰ kg/s, adopted in transdermal drug-patch pharmacokinetics to express dermal absorption rate. A nicotine patch typically releases 14-21 mg over 24 h, corresponding to ≈0.58-0.88 mg/h. Environmental emission tests for laboratory fume hoods also express contaminant escape in mg/h. 1 mg/h = 1/3600 mg/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
| Milligrams per hour (mg/h) | Grains per second (gr/s) |
|---|---|
| 1 mg/h | 4.287 × 10-6 gr/s |
| 2 mg/h | 8.574 × 10-6 gr/s |
| 5 mg/h | 2.143 × 10-5 gr/s |
| 10 mg/h | 4.287 × 10-5 gr/s |
| 25 mg/h | 0.000107169 gr/s |
| 50 mg/h | 0.000214338 gr/s |
| 100 mg/h | 0.000428677 gr/s |