How many units is 10 mg of tirzepatide?

It depends on exactly one thing: the concentration printed on your vial. Here it is at the 4 strengths compounded tirzepatide usually comes in, and drawn on the barrel.

At 5 mg/mL, 10 mg is 200 units — more than one syringe holds. At 10 mg/mL, 10 mg is 100 units (1 mL). At 20 mg/mL, 10 mg is 50 units (0.5 mL). At 40 mg/mL, 10 mg is 25 units (0.25 mL).

10 mg of tirzepatide, by vial concentration. U-100 insulin syringe.
Vial says	Which is	mL	Units	Syringe
5 mg / 1 mL 10 mg / 2 mL 15 mg / 3 mL	5 mg/mL	2	200 ✗	does not fit in one syringe
10 mg / 1 mL 20 mg / 2 mL 30 mg / 3 mL 50 mg / 5 mL	10 mg/mL	1	100	100-unit
20 mg / 1 mL 40 mg / 2 mL 60 mg / 3 mL	20 mg/mL	0.5	50	50-unit
40 mg / 1 mL 80 mg / 2 mL	40 mg/mL	0.25	25	30-unit

What that looks like on the barrel

200 units — more than one syringe holds. 2 mL: that's two draws, or a stronger vial.

5 mg/mL → 200 units

10 mg/mL → 100 units on a 100-unit syringe

20 mg/mL → 50 units on a 50-unit syringe

40 mg/mL → 25 units on a 30-unit syringe

About this dose

Weeks 13–16. A common landing place. 10 mg/mL runs out exactly here: 100 units is the whole barrel. 20 mg/mL (50 units) is where most people on this dose end up. If you're being sent 10 mg/mL vials and titrating past this, it's two injections per dose from here on — ask about 20 or 40 mg/mL before you get there.

Check it yourself

The whole sum is units = dose ÷ concentration × 100. For this dose at 10 mg/mL: 10 ÷ 10 × 100 = 100. If your vial isn't marked in mg/mL, the concentration is the vial's total milligrams divided by the water that went in — a 20 mg vial with 2 mL of water is 10 mg/mL.

Not one of those concentrations?

Tirzepatide vial → unitsU-100 syringe

Vial strength mg

Water you added mL

Your dose mg

Syringe

—

Fill in all three boxes.

Common setups:

← 7.5 mg 12.5 mg →

Other doses: 2.5 mg · 5 mg · 7.5 mg · 12.5 mg · 15 mg. The whole ladder, with every dose at every strength: the tirzepatide chart. Going the other way — you drew a number of units and want the milligrams — is here. And if the vial isn't tirzepatide at all, mg to units works for anything.