How many units is 1 mg of Tesamorelin?

It depends entirely on how much water you added. In a 10 mg vial reconstituted with 2 mL, the concentration is 5 mg/mL, so 1 mg is 0.2 mL, which is 20 units on a U-100 insulin syringe. In the same vial with 1 mL of water it is 10 units, and with 3 mL it is 30 units.

How much bacteriostatic water for a 10 mg Tesamorelin vial?

2 mL is the usual choice. It gives 5 mg/mL, which puts the commonly reported range of 0.5 mg to 2 mg between roughly 10 and 40 units. Aim for a draw between about 10 and 50 units, where the barrel is easiest to read, and add or remove water to get there.

How many doses are in a 10 mg vial?

Divide 10 by your dose. At 1 mg that is 10 doses, which at once daily is 10 days.

How many units is 2 mg of tesamorelin?

In a 10 mg vial with 2 mL of water, 40 units on a U-100 syringe. In a 5 mg vial with 1 mL, also 40 units. In a 2 mg vial with 1 mL, the whole 100 units.

Tesamorelin dosage calculator

Tesamorelin is dosed in whole milligrams once a day, so the draw is larger than most peptides here. Enter your vial, water and dose to get the mark.

IndependentThis site does not sell peptides and is not owned by a vendor. Every other calculator on page one of Google belongs to a shop.

The maths is openThe formula is written out on this page and the code behind it is a single file with an automated test suite.

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ReviewedDose ranges and half-life figures last checked 3 September 2026.

Dose to units, at the standard setup

Dose	Draw	U-100 units	Doses per vial	Vial lasts
0.5 mg	0.1 mL	10 units	20	20 days
1 mg	0.2 mL	20 units	10	10 days
1.5 mg	0.3 mL	30 units	6	6 days
2 mg	0.4 mL	40 units	5	5 days

Based on a 10 mg vial reconstituted with 2 mL of bacteriostatic water, which is 5 mg/mL, drawn on a standard U-100 insulin syringe, once daily.

About the numbers above

Tesamorelin is a stabilised GHRH analogue and, unusually for this list, a licensed medicine (Egrifta) for HIV-associated abdominal fat. The licensed dose is 2 mg once daily by subcutaneous injection. Research vials of 2, 5 and 10 mg are sold outside that licence.

Because the dose is in whole milligrams, the draw is large relative to other peptides. A 10 mg vial with 2 mL of water is 5 mg/mL, so 2 mg is 0.4 mL, or 40 units. A 2 mg vial is a single dose and is usually reconstituted with 0.5 to 1 mL and drawn entirely.

A 10 mg vial at different water volumes

If the draw feels awkward to read, change the water rather than the dose. The dose stays the same; only the mark moves.

Vial	BAC water	Concentration	Draw	U-100 units	Doses/vial
10 mg	1 mL	10 mg/mL	0.1 mL	10 units	10
10 mg	2 mL	5 mg/mL	0.2 mL	20 units	10
10 mg	3 mL	3.33 mg/mL	0.3 mL	30 units	10
5 mg	1 mL	5 mg/mL	0.2 mL	20 units	5
5 mg	2 mL	2.5 mg/mL	0.4 mL	40 units	5
5 mg	3 mL	1.67 mg/mL	0.6 mL	60 units	5

All rows above assume a 1 mg dose and a standard U-100 insulin syringe, where 100 units = 1 mL.

How long it stays in you

The half-life of Tesamorelin is about 36 minutes. That is the time for the amount in your blood to halve, so after one half-life you are at 50 percent of the peak, after two you are at 25 percent, and after four you are at roughly 6 percent. It is gone within an hour or two. What it triggers (a growth hormone pulse, for instance) lasts longer than the peptide itself, which is why timing matters more than the exact number of minutes.

Common questions

How many units is 1 mg of Tesamorelin?: It depends entirely on how much water you added. In a 10 mg vial reconstituted with 2 mL, the concentration is 5 mg/mL, so 1 mg is 0.2 mL, which is 20 units on a U-100 insulin syringe. In the same vial with 1 mL of water it is 10 units, and with 3 mL it is 30 units.
How much bacteriostatic water for a 10 mg Tesamorelin vial?: 2 mL is the usual choice. It gives 5 mg/mL, which puts the commonly reported range of 0.5 mg to 2 mg between roughly 10 and 40 units. Aim for a draw between about 10 and 50 units, where the barrel is easiest to read, and add or remove water to get there.
How many doses are in a 10 mg vial?: Divide 10 by your dose. At 1 mg that is 10 doses, which at once daily is 10 days.
How many units is 2 mg of tesamorelin?: In a 10 mg vial with 2 mL of water, 40 units on a U-100 syringe. In a 5 mg vial with 1 mL, also 40 units. In a 2 mg vial with 1 mL, the whole 100 units.

Buying Tesamorelin? The where to buy page lists the vendors this site uses and what to check before ordering, and Peptide Bureau keeps the ranked vendor scorecard.

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Read this before you use the numbers. This is a unit-conversion tool. It converts a vial strength and a volume of bacteriostatic water into a concentration, a draw volume and a mark on an insulin syringe. It does not tell you what to take, whether to take it, or whether a compound is safe for you. Most of the compounds listed here are sold for laboratory research use and are not approved for human use. Nothing on this site is medical advice. Dosing decisions belong with a licensed clinician who knows your history. Always confirm the strength printed on your own vial rather than trusting a preset.