HGH Reconstitution Calculator
Prescription medication — use only as prescribed by a licensed clinician.
HGH (human growth hormone, somatropin) is a prescription medication. It is labeled in international units (IU) rather than milligrams; the common conversion is roughly 3 IU ≈ 1 mg, so a 10 IU vial is about 3.33 mg. Enter the vial size in milligrams using that conversion, or the mg figure printed on your vial.
Because HGH is dosed in IU, the chart lists IU dose points and their approximate milligram equivalents. Enter the bacteriostatic water you are adding, and the calculator returns the exact mL to draw and the tick on a U-100 insulin syringe (1 IU on the syringe = 0.01 mL — not to be confused with an IU of growth hormone).
HGH is prescription-only and should be used only under a licensed clinician. This tool converts a prescribed dose into a draw volume; it does not recommend a dose and is not medical advice.
Tip: adding 1 mL of bacteriostatic water would put this dose on a clean, easy-to-read mark on a U-100 insulin syringe.
Educational math only — not medical advice, and not a dose recommendation. The dose above is the value you entered. Always follow a licensed clinician’s instructions. Investigational compounds are not FDA-approved.
HGH Dosage Chart
Commonly-cited dose points (about 1–4 IU, using ~3 IU ≈ 1 mg) at a 3.33 mg vial reconstituted with 1 mL of bacteriostatic water. The volume and syringe columns are computed from those inputs — illustrative math, never a dose recommendation.
| Example dose | Volume to draw | U-100 syringe | Notes |
|---|---|---|---|
| ~1 IU (0.33 mg) | 0.100 mL | 10 IU | — |
| ~2 IU (0.67 mg) | 0.200 mL | 20.0 IU | — |
| ~3 IU (1.0 mg) | 0.300 mL | 30.0 IU | — |
| ~4 IU (1.33 mg) | 0.400 mL | 40.0 IU | — |
How to use this calculator
- Vial size — the milligrams printed on your HGH vial (commonly 3.33 or 5 or 6.67 mg).
- Bacteriostatic water — how much you add to dissolve the powder. More water = a larger, easier-to-read draw at the same dose.
- Dose — the amount you intend to draw, in micrograms. This is your number, not a recommendation.
- Read the IU mark — on a U-100 insulin syringe, 1 IU = 0.01 mL. The calculator shows the exact tick to fill to.
HGH FAQ
- How do I convert HGH IU to mg?
- The common conversion is about 3 IU per 1 mg of somatropin, so a 10 IU vial is roughly 3.33 mg. Use that figure for the vial size, then the calculator converts your dose and concentration into the mL and syringe units to draw.
- Why does the syringe show IU too?
- A U-100 insulin syringe is marked in insulin units where 1 IU = 0.01 mL. That is a volume mark, not a growth-hormone IU. The calculator shows the syringe volume tick to fill to for your HGH dose; do not confuse the two meanings of "IU".
- How many units on the syringe is 2 IU of HGH?
- It depends on concentration. A 10 IU (≈3.33 mg) vial reconstituted with 1 mL yields about 3,333 mcg/mL, so a ~2 IU (0.67 mg) dose is about 0.2 mL, which is 20 IU on the U-100 syringe. Adjust for your own vial and water volume.
- Is HGH a prescription drug?
- Yes. HGH (somatropin) is FDA-approved and prescription-only. This page is a reconstitution math tool for a dose your clinician has prescribed; it is educational, not medical advice.