Convert Milligrams per hour to Grains per minute
Convert Milligrams per hour (mg/h) to Grains per minute (gr/min) instantly and accurately.
Conversion Formula
gr/min = mg/h × 0.0002572059725
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 minute
The grain per minute (gr/min) equals 6.479891×10⁻⁵/60 ≈ 1.080×10⁻⁶ kg/s. This unit appears in HVAC humidity engineering: moisture added or removed from conditioned air is traditionally expressed in grains of water per pound of dry air per minute in US practice. A whole-house humidifier may evaporate 300-600 gr/min at design load. 1 gr/min ≈ 1.080×10⁻⁶ kg/s.
Quick Reference Table
| Milligrams per hour (mg/h) | Grains per minute (gr/min) |
|---|---|
| 1 mg/h | 0.000257206 gr/min |
| 2 mg/h | 0.000514412 gr/min |
| 5 mg/h | 0.00128603 gr/min |
| 10 mg/h | 0.00257206 gr/min |
| 25 mg/h | 0.00643015 gr/min |
| 50 mg/h | 0.0128603 gr/min |
| 100 mg/h | 0.0257206 gr/min |