HGH Dosage Calculator

The globally accepted standard, based on the World Health Organization (WHO) international standard for high-purity recombinant Human Growth Hormone (rhGH), is 1 mg ≈ 3 IU. Our calculator uses this as the default for all calculations. This "gold standard" is documented in authoritative sources like this official FDA drug label, which shows that 5mg of somatropin is approximately 15 IU.

While 1 mg ≈ 3 IU is the universal standard, the most crucial principle is to always trust the manufacturer's data first. Some highly precise pharmaceutical products might provide a slightly different potency on their package insert (e.g., "Potency: 2.8 IU per mg"). Our calculator allows you to edit the conversion rate to match your specific product's documentation, ensuring the highest possible accuracy. If your product information is missing or unclear, using the 3 IU/mg standard is the safest baseline.

Common starting doses for general research purposes often range from 1 to 2 IU per day. However, the optimal dose is highly dependent on the specific research goals, subject weight, and other factors. The information provided here is for informational purposes only and is not a recommendation. Always consult authoritative research literature for your specific application.

For standard 10 IU vials, the most common practice is to add 1 mL of bacteriostatic water. This makes the math very simple (10 IU per mL).

Note for Pen/Cartridge Users: If you are using pharmaceutical-grade pre-filled devices (e.g., Genotropin 16 IU / 5.3 mg), be aware that they often come with a fixed diluent volume that is not exactly 1.0 mL. For instance, this official Pfizer label specifies 1.15 mL of solvent. Always check your device's package insert to enter the exact water volume for the highest accuracy.

Once reconstituted with bacteriostatic water, HGH solution must always be kept refrigerated (approx. +4 °C). It is highly sensitive to heat and agitation. Do not freeze the reconstituted solution, as this can damage the hormone's delicate structure. Most reconstituted HGH solutions remain stable for approximately 3 to 4 weeks when stored correctly.

No, you will use the same standard U-100 insulin syringes discussed on our main page. This HGH calculator does the essential work of converting the biological potency (IU) into the precise physical volume (units) needed for your U-100 syringe.

You are currently on our dedicated HGH Dosage Calculator. For other substances, we have specialized tools:

• For a universal tool that handles HCG, Insulin, and other IU-based substances, please use our IU Dosage Calculator.
• For all other standard peptides measured in mg/mcg, our primary Online Peptide Calculator is the right tool.

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