Convert Milligrams per day to Grains per second
Convert Milligrams per day (mg/d) to Grains per second (gr/s) instantly and accurately.
Conversion Formula
gr/s = mg/d × 1.786152587e-7
About Milligrams per day
The milligram per day (mg/d) equals 10⁻⁶/86400 ≈ 1.157×10⁻¹¹ kg/s, used in toxicology (daily intake limits) and in slow-release pharmaceutical implants. WHO acceptable daily intake for food additives is expressed in mg/kg body mass per day; a 70 kg adult at 1 mg/kg/d represents a 70 mg/d dose. 1 mg/d ≈ 1.157×10⁻¹¹ kg/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 day (mg/d) | Grains per second (gr/s) |
|---|---|
| 1 mg/d | 1.786 × 10-7 gr/s |
| 2 mg/d | 3.572 × 10-7 gr/s |
| 5 mg/d | 8.931 × 10-7 gr/s |
| 10 mg/d | 1.786 × 10-6 gr/s |
| 25 mg/d | 4.465 × 10-6 gr/s |
| 50 mg/d | 8.931 × 10-6 gr/s |
| 100 mg/d | 1.786 × 10-5 gr/s |