Tesamorelin Reconstitution Calculator (mg → units)
A 5 mg vial of Tesamorelin mixed with 2 mL of bacteriostatic water holds 2,500 mcg/mL, so a 1.4 mg dose is 0.56 mL — 56 units on a U-100 insulin syringe. Change the vial, water or dose below, or read the chart for other mixes.
Tesamorelin dilution chart: 1.4 mg in units
| Vial | + 0.5 mL water | + 1 mL water | + 2 mL water | + 3 mL water | Doses per vial |
|---|---|---|---|---|---|
| 2 mg | 35 U 0.35 mL · 4,000 mcg/mL | 70 U 0.7 mL · 2,000 mcg/mL | 140 U 1.4 mL · 1,000 mcg/mL over 1 mL — more than one syringe | 210 U 2.1 mL · 667 mcg/mL over 1 mL — more than one syringe | 1.4 |
| 5 mg | 14 U 0.14 mL · 10,000 mcg/mL | 28 U 0.28 mL · 5,000 mcg/mL | 56 U 0.56 mL · 2,500 mcg/mL | 84 U 0.84 mL · 1,667 mcg/mL | 3.6 |
| 10 mg | 7 U 0.07 mL · 20,000 mcg/mL | 14 U 0.14 mL · 10,000 mcg/mL | 28 U 0.28 mL · 5,000 mcg/mL | 42 U 0.42 mL · 3,333 mcg/mL | 7.1 |
1 mL = 100 units on a U-100 syringe. Water volume changes the units per dose, never the number of doses in the vial.
Measuring Tesamorelin: the math that matters
Tesamorelin is one of the few compounds here with an FDA label that spells out the reconstitution, so the calculator can be checked against it. Egrifta SV comes as a 2 mg vial, mixed with 0.5 mL of the supplied diluent, and the label dose of 1.4 mg is 0.35 mL of that solution. The math agrees: 2 mg in 0.5 mL is 4,000 mcg/mL, and 1,400 ÷ 4,000 = 0.35 mL, which is 35 units on a U-100 syringe.
The chart shows why the label mix is so concentrated. The same 2 mg vial with 2 mL of water would need 140 units for 1.4 mg, more than a full 1 mL syringe, and 1.4 mg is most of what the vial holds. A 2 mg vial covers one 1.4 mg dose with 0.6 mg left, and the label says to inject right after mixing and throw away any unused solution.
Research vials are a different situation. A 5 mg vial holds about three and a half 1.4 mg doses; with 2 mL it is 2,500 mcg/mL and each dose is 56 units. A 10 mg vial with 2 mL puts 1.4 mg at 28 units and holds seven full doses. Because these vials are drawn from over several days, the single-use instructions on the Egrifta label do not describe them, and the storage guidance in the injection guide below is the relevant starting point.
Decimals matter at this dose. 1.4 mg is 1,400 mcg; 1.4 entered as mcg gives a result a thousand times too small. The label's companion product, Egrifta WR, is dosed at 1.28 mg, so check which figure you are working from before entering it.
Common Tesamorelin measuring mistakes
- Mixing an Egrifta-style 2 mg vial with 2 mL of water instead of 0.5 mL, which pushes the dose past one syringe.
- Keeping the leftover from a 2 mg single-dose vial when the label says to discard it.
- Mixing up the Egrifta SV (1.4 mg) and Egrifta WR (1.28 mg) doses.
- Entering 1.4 as mcg instead of mg.
- Assuming research vials behave like the label product. A 10 mg vial at 2 mL needs 28 units per dose, not 35.