Somatropin IU to mg converter
1 IU of somatropin equals approximately 0.33 mg. The conversion comes from the standard 3 IU per mg ratio used by every FDA-approved somatropin brand.
Input
1 IU
=
Mass
0.33 mg
IU ÷ 3 = mg
Lookup table
Somatropin IU to mg at 3 IU per mg
Pre-calculated for the standard clinical conversion. Divide the IU value by 3 to get mg.
| Somatropin (IU) | Equivalent (mg) |
|---|---|
| 1 IU | 0.333 mg |
| 2 IU | 0.667 mg |
| 3 IU | 1 mg |
| 4 IU | 1.33 mg |
| 5 IU | 1.67 mg |
| 6 IU | 2 mg |
| 8 IU | 2.67 mg |
| 10 IU | 3.33 mg |
| 12 IU | 4 mg |
| 15 IU | 5 mg |
| 16 IU | 5.33 mg |
| 18 IU | 6 mg |
| 20 IU | 6.67 mg |
| 24 IU | 8 mg |
| 25 IU | 8.33 mg |
| 30 IU | 10 mg |
| 36 IU | 12 mg |
| 40 IU | 13.33 mg |
| 45 IU | 15 mg |
| 50 IU | 16.67 mg |
| 60 IU | 20 mg |
| 75 IU | 25 mg |
| 90 IU | 30 mg |
| 100 IU | 33.33 mg |
Compounded mg vials
Mg vials to IU equivalent
Compounded somatropin sometimes ships labelled in mg rather than IU. Here is the IU equivalent for common compounded mg vial sizes.
| Vial size (mg) | Equivalent (IU) |
|---|---|
| 1 mg | 3 IU |
| 2 mg | 6 IU |
| 4 mg | 12 IU |
| 5 mg | 15 IU |
| 6 mg | 18 IU |
| 8 mg | 24 IU |
| 10 mg | 30 IU |
| 12 mg | 36 IU |
| 15 mg | 45 IU |
FAQ
Frequently asked questions
- How many mg is 1 IU of somatropin?
- 1 IU of somatropin equals approximately 0.33 mg, since the standard clinical conversion is 3 IU per mg.
- How many mg is 10 IU of somatropin?
- 10 IU divided by 3 IU per mg equals approximately 3.33 mg of somatropin.
- How many mg is 6 IU of somatropin?
- 6 IU equals approximately 2 mg of somatropin (6 ÷ 3 = 2).
- How many mg is 36 IU of somatropin?
- 36 IU equals approximately 12 mg of somatropin (36 ÷ 3 = 12). 36 IU vials are common in larger Norditropin and Genotropin presentations.
- Is the IU to mg conversion the same for every somatropin brand?
- Yes. The 3 IU per mg conversion is calibrated against the WHO somatropin reference standard and is used by every FDA-approved brand including Genotropin, Humatrope, Norditropin, Saizen, and Omnitrope.
Notice
PeptideDose is an educational reference. It is not medical advice and does not replace consultation with a licensed healthcare provider. Doses shown in presets are derived from published protocols and product labels — they are not personal recommendations.