mg ↔ IU ↔ syringe units
HGH Calculator
Convert somatropin between mg and IU, and an IU dose into units on a U-100 syringe.
HGH (somatropin) calculator
Example values are loaded. Replace them with the numbers on your own vial.
mg and IU for somatropin
Somatropin is recombinant human growth hormone, a prescription drug approved for specific conditions such as growth hormone deficiency. Some products are labelled in mg and others in IU. The standard conversion is:
| mg | IU |
|---|---|
| 1 | 3 |
| 3.33 | 10 |
| 5 | 15 |
| 6 | 18 |
| 10 | 30 |
| 12 | 36 |
This 1 mg = 3 IU conversion is specific to somatropin and does not apply to other substances.
Pens and cartridges
Most branded somatropin comes in pens or cartridges that are already mixed or mix themselves, with the dose set on the pen. The syringe math on this page applies to vials you draw from with a U-100 insulin syringe. Select "mg somatropin" or "IU" to match your label.
Somatropin is prescription-only. In the US, distributing it for uses other than those it is approved for is a federal crime, and it is prohibited in sport.
Frequently asked questions
How many IU are in 5 mg of HGH?
5 mg of somatropin is 15 IU.
How many units is 1 IU of HGH?
It depends on the concentration. 5 mg (15 IU) in 1 mL is 15 IU/mL, so 1 IU is 6.7 units. In 2 mL, 1 IU is 13.3 units.