Peptide Unit Converter
Convert between micrograms (mcg), milligrams (mg), and International Units (IU). Select a peptide for accurate IU conversions.
1 mg = 3 IU for HGH (somatropin)
1 MG =
Disclaimer: IU conversion factors are approximate and based on standard pharmaceutical reference values. Actual potency may vary by manufacturer and batch.
Frequently Asked Questions
What is the difference between mcg and mg?
A microgram (mcg) is one-thousandth of a milligram (mg). So 1 mg = 1,000 mcg. Peptide doses are typically measured in micrograms (mcg), while vial sizes are measured in milligrams (mg).
What are International Units (IU)?
International Units (IU) are a measurement based on the biological activity of a substance, not its weight. The conversion factor between IU and mg varies by compound. For example, 1 mg of HGH equals approximately 3 IU, while 1 mg of HCG equals approximately 10,000 IU.
Why do some peptides use IU instead of mcg?
IU are used when the biological potency of a compound matters more than its weight. HGH, HCG, and insulin are dosed in IU because batches can have slightly different potencies per milligram. IU standardizes the dose by effect rather than weight.
How do I convert HGH from IU to mg?
For pharmaceutical-grade HGH (somatropin), 1 mg ≈ 3 IU. So 10 IU of HGH is approximately 3.33 mg. Note that different manufacturers may have slightly different conversion factors.