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Retatrutide units calculator.

Turn mg into units on a U-100 insulin syringe. Retatrutide is investigational and not FDA approved. The calculator starts on an example.

Use the dose your prescriber gave you and the concentration printed on your vial or pharmacy label. Vialist does the math; it does not give dosing advice.

The fields start on an example (10 mg vial, 2 mL, 1 mg). That example is not a dose for you.

Retatrutide units calculator

Draw on a U-100 syringe

20 units

0.2 mL · 5.00 mg/mL

Check the markings on the syringe you are using.

This page's script recomputes the draw as you type. With JavaScript off, the figures stay on the example: 10 mg in 2 mL, a 1 mg dose, 20 units on a U-100 syringe (0.2 mL, 5.00 mg/mL). Converts the numbers you type. It does not suggest a dose.

Turn mg into units on a U-100 syringe

A U-100 insulin syringe is marked in units, and 100 units is 1 mL. A vial is labeled in mg. To get from one to the other you need the concentration, which is how many mg are in each mL of liquid in the vial. This page only does arithmetic on the numbers your prescriber or pharmacist gave you.

units = amount in mg ÷ concentration in mg per mL × 100

Worked example, using the numbers the calculator starts on. A 10 mg vial with 2 mL of liquid is 10 ÷ 2 = 5 mg per mL. An amount of 1 mg is 1 ÷ 5 = 0.2 mL, and 0.2 mL × 100 = 20 units. Example only. Use the dose your prescriber gave you.

Worked examples

The amounts and the two concentrations below are arbitrary examples chosen to show the arithmetic. They are not doses, and being in this table does not mean an amount is right for anyone. Always use the dose your prescriber gave you and the concentration on your own label, and if your concentration is not here, type it into the calculator.

Units and mL on a U-100 syringe, for five example amounts, at two example concentrations (not doses)
Amount (mg)	5 mg/mL		10 mg/mL
Amount (mg)	Units	mL	Units	mL
0.5	10	0.1	5	0.05
1	20	0.2	10	0.1
2	40	0.4	20	0.2
3	60	0.6	30	0.3
4	80	0.8	40	0.4

Each cell is computed by the same code as the calculator above. Read across your amount, then down to the concentration on your label.

Check before you draw

Confirm the syringe says U-100. Other scales (U-50, U-40) give different numbers for the same mL.
Units and mL are not the same thing. On a U-100 syringe, 10 units is 0.1 mL.
Compare the result with the pharmacy label, or ask your pharmacist to check it with you.

Questions

Straight answers.

How many units is 1 mg at 5 mg/mL?

At 5 mg/mL, 1 mg is 0.2 mL, which is 20 units on a U-100 syringe. At 10 mg/mL it is 0.1 mL, or 10 units. Same amount, different concentration, different units. Example only. Use the dose your prescriber gave you.

Are units the same as mg?

No. Units on an insulin syringe measure volume: 100 units is 1 mL. Mg measures how much of the compound is in that volume. The concentration links the two.

How do I find my concentration?

Divide the amount in the vial by the water you added. A 10 mg vial with 2 mL is 5 mg per mL. If a pharmacy supplied it ready to use, the concentration is printed on the label.

What if the result is over 100 units?

A 1 mL U-100 syringe holds 100 units. The calculator warns when the draw is larger than the barrel you pick or over 100 units, so you can double-check the numbers you typed.

Does Vialist tell me what dose to take?

No. You enter the dose your prescriber gave you. Vialist does the unit math and keeps the record.

Try it on your own protocol.

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