Tirzepatide at 40 mg/mL: the schedule in units

If the label says 40 mg / 1 mL, 80 mg / 2 mL — it's 40 mg/mL. Read down. Every step of the standard tirzepatide ladder, as units on a U-100 insulin syringe.

Tirzepatide (Zepbound, Mounjaro) titration at 40 mg/mL. Each step is held four weeks before the next.
When	Dose	mL	Units	Syringe
Weeks 1–4	2.5 mg	0.063	6.25	30-unit
Weeks 5–8	5 mg	0.125	12.5	30-unit
Weeks 9–12	7.5 mg	0.188	18.75	30-unit
Weeks 13–16	10 mg	0.25	25	30-unit
Weeks 17–20	12.5 mg	0.313	31.25	50-unit
Week 21+	15 mg	0.375	37.5	50-unit

Strong. Every dose fits, and the top of the ladder is only 37.5 units. The bottom is the problem: 2.5 mg is 6.25 units, small enough that one mark's slip is a 16 % error. Reasonable from 10 mg up; awkward for the first two months.

Each step on the barrel

2.5 mg → 6.25 units on a 30-unit syringe

5 mg → 12.5 units on a 30-unit syringe

7.5 mg → 18.75 units on a 30-unit syringe

10 mg → 25 units on a 30-unit syringe

12.5 mg → 31.25 units on a 50-unit syringe

15 mg → 37.5 units on a 50-unit syringe

In-between doses at 40 mg/mL

Not on any label. They exist because vials make them possible, and they only make sense if a prescriber put you there deliberately — usually because a full step up was too much at once.

Dose	mL	Units at 40 mg/mL
3.75 mg	0.094	9.38
6.25 mg	0.156	15.63
8.75 mg	0.219	21.88
11.25 mg	0.281	28.13

Your dose isn't on the list

Tirzepatide at 40 mg/mL → unitsU-100 syringe

Vial strength mg

Water you added mL

Your dose mg

Syringe

—

Fill in all three boxes.

Common setups:

Other strengths: 5 mg/mL · 10 mg/mL · 20 mg/mL. All of them side by side: the tirzepatide chart. One dose at a time, across every strength: 2.5 mg · 5 mg · 7.5 mg · 10 mg · 12.5 mg · 15 mg.