PepSync

HGH reconstitution calculator

HGH is dosed in international units (IU), not micrograms. This calculator helps you convert a vial's IU and your BAC water volume into the units to draw on an insulin syringe.

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  • Formula shown below
  • U-100 syringe units

HGH dose calculator

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On the vial label
mg
Amount you add
mL
What you plan to take
Syringe sizeU-100 insulin syringe
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calculations run
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peptides supported
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Built with research from
  • World Health Organization
  • University of Oxford
  • Harvard Medical School

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How your HGH draw is calculated

  1. 1Find the concentration

    10 mg × 1,000 ÷ 1 mL
    = 10,000 mcg/mL

  2. 2Work out the volume

    1,000 mcg ÷ 10,000 mcg/mL
    = 0.10 mL

  3. 3Convert to units

    0.10 mL × 100
    = 10 units

On a U-100 insulin syringe, 100 units equals 1 mL, so each unit is 0.01 mL. The 0.3 mL (30 unit) and 0.5 mL (50 unit) syringes use the same scale, just shorter, which makes small doses easier to read.

Common vial examples
10 / 12 / 15 IU
Conversion
~3 IU ≈ 1 mg
Common syringe
U-100 insulin
Educational reference only. Not medical advice — follow the instructions from your clinician or pharmacy.

HGH is measured in IU

Most HGH vials are labelled in international units (IU), not milligrams. A common approximation is about 3 IU per 1 mg, but check your product — potency varies.

To use this calculator, convert the vial's IU to mg first, then enter that mg amount and your BAC water volume.

  • 10 IU vial ≈ 3.33 mg
  • Reconstitute with 1 mL → 3.33 mg/mL
  • A 2 IU (~0.67 mg) dose ≈ 0.2 mL = 20 units on a U-100 syringe

Worked HGH example

A 10 IU vial reconstituted with 1 mL gives roughly 3.33 mg/mL. A 2 IU dose is about 0.67 mg, which is 0.2 mL — 20 units on a U-100 insulin syringe.

Using 2 mL of BAC water instead halves the concentration, so the same 2 IU dose becomes 0.4 mL (40 units).

Worked example with a 15 IU vial

A 15 IU vial is about 5 mg of HGH. Reconstituted with 1.5 mL, that is roughly 3.33 mg/mL — the same concentration as the 10 IU in 1 mL example, because the IU-to-water ratio matches.

At that concentration a 2 IU (~0.67 mg) dose is still 0.2 mL, or 20 units. Keeping the IU-per-mL ratio consistent across vial sizes keeps your unit count familiar.

  • 15 IU ≈ 5 mg
  • 5 mg / 1.5 mL ≈ 3.33 mg/mL
  • 2 IU dose ≈ 0.2 mL = 20 U-100 units

Choose BAC water to make IU doses easy to read

Because HGH doses are small, the water volume you pick decides how many syringe units a dose lands on. More water spreads a dose across more units, which can make a 1 IU or 2 IU dose easier to measure precisely.

For a 10 IU vial: 1 mL puts a 2 IU dose at 20 units, while 2 mL puts the same dose at 40 units. Pick whichever lands your usual dose on a clear, easy-to-read mark.

  • More BAC water = more units per IU = easier small-dose reading
  • 10 IU in 1 mL: 2 IU dose = 20 units
  • 10 IU in 2 mL: 2 IU dose = 40 units

Frequently asked questions

How many IU are in 1 mg of HGH?
A common approximation is about 3 IU per mg, so 1 mg ≈ 3 IU. Potency varies by product, so confirm the conversion stated on your vial or by your pharmacy.
How do I convert an HGH IU dose to insulin-syringe units?
First convert IU to mg (about 3 IU per mg), then divide by the vial's mg/mL concentration to get mL, then multiply mL by 100 for U-100 units. The calculator does all three steps once you enter the vial mg and water volume.
How much BAC water should I use for an HGH vial?
1–2 mL per vial is common. Less water gives a smaller, more concentrated draw; more water makes small IU doses easier to measure on an insulin syringe.
What syringe is used for HGH?
A U-100 insulin syringe is standard. Because HGH doses are small, reading the dose in units on a U-100 syringe is usually the most accurate approach.
Why is my HGH draw so small?
HGH doses are only a couple of IU, which is a fraction of a milligram, so even a fairly dilute vial produces a small draw. If a dose is hard to read, add more BAC water to spread it across more syringe units.
From PepSync users

Dosing with confidence.

  • “Very good and accurate… shows you a diagram of where to pin. Very easy to use and very beginner friendly if you’re starting off.”
    jesaiah685 · App Store review · Australia
  • “User friendly. Easy to navigate and understand.”
    jusPeaches · App Store review · United States
  • “Well put together. Nice friendly layout.”
    Crowleyboy666 · App Store review · United Kingdom
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