⚠️ Before using any table below, check your vial label for the concentration (e.g., 10 mg/mL or 20 mg/mL). The same unit count gives you a very different dose depending on your vial. Using the wrong table is a common and serious mistake — if you're unsure which vial you have, contact the care team before injecting.
Quick Reference Tables
Tirzepatide 20 mg/mL
Dose | Units |
2.5 mg | 13 units |
5 mg | 25 units |
7.5 mg | 38 units |
10 mg | 50 units |
12.5 mg | 63 units |
15 mg | 75 units |
Tirzepatide 10 mg/mL
Dose | Units |
2.5 mg | 25 units |
5 mg | 50 units |
7.5 mg | 75 units |
Semaglutide 2.5 mg/mL
Dose | Units |
0.25 mg | 10 units |
0.5 mg | 20 units |
1 mg | 40 units |
1.75 mg | 70 units |
2.5 mg | 100 units |
Semaglutide 1 mg/mL
Dose | Units |
0.25 mg | 25 units |
How the math works
Your dose is prescribed in milligrams (mg), but your syringe is marked in units. To convert, you need the concentration printed on your vial label.
Step-by-step:
Check your vial concentration. It will say something like "10 mg/mL" — this tells you how many milligrams are in each milliliter.
Know your syringe. A standard 50-unit insulin syringe holds 0.5 mL when full, so 1 unit = 0.01 mL.
Do the math. Multiply your concentration by 0.01 to get mg per unit, then multiply by your units. Example: 10 mg/mL × 0.01 = 0.1 mg per unit. At 50 units: 50 × 0.1 = 5 mg.
Double-check every time. Verify both the vial concentration and your prescribed dose before each injection.
Common mistake: Don't confuse total vial content with concentration. A 60 mg vial in 3 mL = 20 mg/mL. A 30 mg vial in 3 mL = 10 mg/mL. Always go by the concentration on the label, not the total mg.
If the math doesn't look right, contact the care team before injecting.