Tirzepatide at 20 mg/mL: the schedule in units

If the label says 20 mg / 1 mL, 40 mg / 2 mL, 60 mg / 3 mL — it's 20 mg/mL. Read down. Every step of the standard tirzepatide ladder, as units on a U-100 insulin syringe.

Tirzepatide (Zepbound, Mounjaro) titration at 20 mg/mL. Each step is held four weeks before the next.
When	Dose	mL	Units	Syringe
Weeks 1–4	2.5 mg	0.125	12.5	30-unit
Weeks 5–8	5 mg	0.25	25	30-unit
Weeks 9–12	7.5 mg	0.375	37.5	50-unit
Weeks 13–16	10 mg	0.5	50	50-unit
Weeks 17–20	12.5 mg	0.625	62.5	100-unit
Week 21+	15 mg	0.75	75	100-unit

The one that carries the whole ladder in a single syringe: 12.5 units at the bottom, 75 at the top. The trade-off is that 2.5 mg is a 12.5-unit draw, which sits between marks on a 100-unit barrel — use the 30-unit syringe for the first month.

Each step on the barrel

2.5 mg → 12.5 units on a 30-unit syringe

5 mg → 25 units on a 30-unit syringe

7.5 mg → 37.5 units on a 50-unit syringe

10 mg → 50 units on a 50-unit syringe

12.5 mg → 62.5 units on a 100-unit syringe

15 mg → 75 units on a 100-unit syringe

In-between doses at 20 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 20 mg/mL
3.75 mg	0.188	18.75
6.25 mg	0.313	31.25
8.75 mg	0.438	43.75
11.25 mg	0.563	56.25

Your dose isn't on the list

Tirzepatide at 20 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 · 40 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.