HGH · IU · mg · U-100 insulin syringe
HGH Dosage Calculator (IU, mg & Units)
Convert your HGH between IU and mg and see the exact units to draw on your insulin syringe, based on how you reconstituted the vial. It works as an HGH dose calculator for any vial size.
HGH vials are usually labeled in IU. Common sizes: 10 IU, 12 IU, 30 IU.
Standard somatropin is ~3 IU/mg. Check your product label.
Draw syringe to
20 units
(0.20 mL)
Draw 20.0 units (0.200 mL) for your 2 IU dose.
That's 2.00 IU = 0.667 mg at 3 IU/mg.
Concentration: 10.00 IU/mL. Doses per vial: 5.0.
Units measure volume on the syringe, not the amount of HGH. The same dose is a different number of units at a different concentration, so always set your vial size and water first.
IU → units on U-100 (your vial + water)
| Dose (IU) | Dose (mg) | Volume (mL) | Units (U-100) |
|---|---|---|---|
| 1 IU | 0.333 | 0.100 | 10.0 |
| 2 IU | 0.667 | 0.200 | 20.0 |
| 3 IU | 1.000 | 0.300 | 30.0 |
| 4 IU | 1.333 | 0.400 | 40.0 |
| 5 IU | 1.667 | 0.500 | 50.0 |
This calculator is for informational purposes only, so always double-check your result with a healthcare provider. We assume no liability for dosing errors.
Last updated September 2026 · Reviewed by the Regimen Team
How to use it
How to use this calculator
- 01
Enter your vial size
HGH vials are usually labeled in IU. Common sizes are 10 IU, 12 IU, and 30 IU. Toggle to mg if your label uses milligrams.
- 02
Enter the BAC water you added
Commonly 1 to 2 mL. Whatever you actually mixed in.
- 03
Enter your dose in IU or mg
Use the dose your provider or product label specifies.
- 04
Read units and mL
The calculator returns the exact units to draw on a U-100, U-50, or U-40 syringe, plus the concentration, mg equivalent, and doses per vial.
Your dose (20.0 units (0.200 mL) at U-100)
100 units = 1mL
Draw 20.0 units (0.200 mL) for your 2 IU dose.
That’s 2.00 IU = 0.667 mg at 3 IU/mg.
Concentration: 10.00 IU/mL. Doses per vial: 5.0.
This HGH calculator turns your vial, your bacteriostatic water and your dose into the units to draw on an insulin syringe. It works as an HGH calculator IU to units, an HGH dose calculator and a somatropin dosage calculator in one: enter IU or mg, and it converts between them at 3 IU per mg (adjustable), then gives the mL and the units. It covers pharmacy somatropin and HGH 191AA vials alike, since the math is the same; only the label differs.
Units measure volume on the syringe, not the amount of HGH. The same dose is a different number of units at a different concentration, so always set your vial size and water first.
IU → units on U-100 (your vial + water)
| Dose (IU) | Dose (mg) | Volume (mL) | Units (U-100) |
|---|---|---|---|
| 1 IU | 0.333 | 0.100 | 10.0 |
| 2 IU | 0.667 | 0.200 | 20.0 |
| 3 IU | 1.000 | 0.300 | 30.0 |
| 4 IU | 1.333 | 0.400 | 40.0 |
| 5 IU | 1.667 | 0.500 | 50.0 |
HGH dose to units reference (10 IU vial in 1 mL BAC water, U-100)
Common amounts people discuss, shown for reference. How much is 2 IU of HGH on an insulin syringe? At this mix, 20 units, and 1 IU of HGH is 10 units. This is not a dosing recommendation. Use the amount your provider or product label specifies. Concentration: 10 IU/mL on a U-100 syringe.
| Dose (IU) | Volume (mL) | Units (U-100) |
|---|---|---|
| 1 IU | 0.100 | 10 |
| 2 IU | 0.200 | 20 |
| 3 IU | 0.300 | 30 |
| 4 IU | 0.400 | 40 |
| 5 IU | 0.500 | 50 |
HGH IU to mg and mg to IU quick conversion (3 IU/mg)
| mg | IU |
|---|---|
| 0.33 mg | 1 IU |
| 0.67 mg | 2 IU |
| 1 mg | 3 IU |
| 2 mg | 6 IU |
| 3.33 mg | 10 IU |
| 10 mg | 30 IU |
Somatropin conversion: 1 mg equals 3 IU
HGH gets labeled two ways and it trips people up. Milligrams measure the actual amount; IU (international units) measure its activity. For standard somatropin they’re linked at about 3 IU per mg, so a 1 mg dose is roughly 3 IU. Your vial might be printed in either, which is why the calculator lets you enter and read both.
HGH reconstitution calculator: why your units depend on how you mixed it
Just like any reconstituted vial, the units you draw come from your concentration, not the dose alone. A 10 IU vial in 1 mL of bacteriostatic water is 10 IU per mL, so a 2 IU dose is 0.2 mL, which is 20 units on a U-100 syringe. Use more or less water and every number changes. Set your mix once and the units follow.
Save your vial mix so the units ride with every dose. Log your HGH in Regimen and your draw amount stays consistent across the vial.
If you searched for an HGH dose calculator or a growth hormone dose calculator, this is the same tool: it converts a dose you already have, it does not pick one. Related: the general peptide reconstitution calculator, HCG reconstitution calculator, mg to units converter, and units to mL converter.
This tool is for self-tracking and education. It converts between IU, mg, mL, and syringe units for a dose you choose; it does not provide medical advice or recommend a dose. HGH (somatropin) is a controlled medication. Follow a qualified provider and your product label.
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