Unit Converter
Instantly convert between grams, milligrams, and micrograms.
Micrograms1,000 mcg
Milligrams1 mg
Grams0.001 g
Understanding "IU" (International Units)
IU is NOT a weight.
An International Unit measures biological activity. The conversion to weight (mg) depends on the specific substance and its potency. You cannot convert IU to mg without knowing the specific drug.
| Substance | Approx. Conversion | Note |
|---|---|---|
| HGH (Somatropin) | 1 mg ≈ 3 IU | Varies by manufacturer purity (2.6 - 3.0 IU/mg) |
| Insulin | 1 mg ≈ 26-28 IU | Standard U-100 insulin is 100 IU/ml |
| HCG | N/A | Purely measured in biological activity |