Vial to Units

HGH Calculator

Convert a dose of HGH into syringe units. Enter the vial size, the bacteriostatic water added and the dose on your prescription.

IU
mL
IU

Enter the vial size and the water you added.

Arithmetic only. This tool does not recommend a dose; use the one your prescriber gave you.

About HGH (somatropin)

HGH (somatropin) is recombinant human growth hormone.

FDA-approved as a prescription medicine under several brand names.

Many brand-name somatropin products are pens or cartridges that are dialled directly and need no syringe arithmetic. This calculator applies to vials of powder that are mixed and drawn with an insulin syringe.

HGH vials are labelled in IU or in mg. As a rule of thumb 1 mg of somatropin is about 3 IU; use the figure printed on your vial.

HGH concentration chart

Concentration for common vial sizes at 1, 2, 3 and 5 mL of water, with the amount held in every 10 units of a U-100 syringe.

Vial1 mL water2 mL water3 mL water5 mL water
4 IU4 IU/mL · 0.4 IU per 10 units2 IU/mL · 0.2 IU per 10 units1.333 IU/mL · 0.1333 IU per 10 units0.8 IU/mL · 0.08 IU per 10 units
10 IU10 IU/mL · 1 IU per 10 units5 IU/mL · 0.5 IU per 10 units3.333 IU/mL · 0.3333 IU per 10 units2 IU/mL · 0.2 IU per 10 units
12 IU12 IU/mL · 1.2 IU per 10 units6 IU/mL · 0.6 IU per 10 units4 IU/mL · 0.4 IU per 10 units2.4 IU/mL · 0.24 IU per 10 units
16 IU16 IU/mL · 1.6 IU per 10 units8 IU/mL · 0.8 IU per 10 units5.333 IU/mL · 0.5333 IU per 10 units3.2 IU/mL · 0.32 IU per 10 units
36 IU36 IU/mL · 3.6 IU per 10 units18 IU/mL · 1.8 IU per 10 units12 IU/mL · 1.2 IU per 10 units7.2 IU/mL · 0.72 IU per 10 units

Units per 1 IU of HGH

How many units on a U-100 syringe hold 1 IU, for each vial size and water volume. 1 IU is a round reference amount for scaling, not a dose: multiply or divide to match the dose on your prescription, or use the calculator.

Vial1 mL water2 mL water3 mL water5 mL water
4 IU25 units50 units75 units125 units · over 1 mL
10 IU10 units20 units30 units50 units
12 IU8.333 units16.67 units25 units41.67 units
16 IU6.25 units12.5 units18.75 units31.25 units
36 IU2.778 units5.556 units8.333 units13.89 units

Questions

How do I calculate HGH units on a syringe?

Divide the IU in the vial by the mL of water added to get IU/mL. Divide your prescribed dose by that figure for mL, then multiply by 100 for units on a U-100 syringe. For example, a 10 IU vial with 2 mL of water is 5 IU/mL, so every 10 units holds 0.5 IU.

How many units is 1 IU of HGH?

It depends on the vial size and the water added. With a 10 IU vial, 1 IU is 10 units after 1 mL of water, 20 units after 2 mL of water, 30 units after 3 mL of water. The lookup table above covers the other vial sizes.

Is HGH measured in IU or mg?

HGH vials are labelled in IU or in mg. As a rule of thumb 1 mg of somatropin is about 3 IU; use the figure printed on your vial.

Are IU and syringe units the same for HGH?

No. IU is the amount of HGH in the vial. Units on an insulin syringe are volume: 100 units is 1 mL. A 10 IU vial mixed with 2 mL holds 0.05 IU in each syringe unit.

Does this calculator apply to somatropin pens and cartridges?

Many brand-name somatropin products are pens or cartridges that are dialled directly and need no syringe arithmetic. This calculator applies to vials of powder that are mixed and drawn with an insulin syringe.

How much bacteriostatic water do I add to HGH?

Follow the amount on your pharmacy label. The volume of water does not change how much HGH is in the vial; it only changes how many units a given dose takes up. Enter whatever amount was actually added.

What HGH dose should I enter?

The dose written on your prescription. This page converts a dose into syringe units and does not recommend one.

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