Tirzepatide 30 mg reconstituted with 5 mL
Concentration
6mg/mL
- Per insulin unit
- 60 mcg
- Solution in vial
- 500 u
- 5 mg draw
- 83.3 u
Math utility only — not medical advice. Not a recommended dose.
Units per dose at 6 mg/mL
Insulin syringes are graduated in hundredths of a millilitre, so units = mL × 100 on a U-100, U-50 or U-30 barrel alike.
| Dose | Volume | U-100 units | Fits | Doses per vial |
|---|---|---|---|---|
| 2.5 mg | 0.417 mL | 41.7 u | U-50 | 12 |
| 5 mg | 0.833 mL | 83.3 u | U-100 | 6 |
| 7.5 mg | 1.25 mL | 125 u | split draw | 4 |
| 10 mg | 1.667 mL | 166.7 u | split draw | 3 |
| 12.5 mg | 2.083 mL | 208.3 u | split draw | 2 |
| 15 mg | 2.5 mL | 250 u | split draw | 2 |
Amber rows exceed 100 units — more than one full U-100 barrel. That dose needs a larger draw or a stronger mix (less water).
How this is calculated
1 · Concentration
30 mg ÷ 5 mL = 6 mg/mL
The peptide mass never changes — bacteriostatic water only sets how concentrated the solution is, and therefore how far the plunger travels.
2 · Volume for a 5 mg dose
5 mg ÷ 6 mg/mL = 0.833 mL
3 · Insulin units
0.833 mL × 100 = 83.3 units
Every unit on the barrel carries 60 mcg at this concentration, so misreading by one unit is a 60 mcg error.
See it on a real syringe
The interactive calculator draws this 6 mg/mL mix on a scaled U-100 barrel, shows when a draw lands exactly on a printed tick, and works backwards from a target dose to the water volume that makes it land cleanly.
Open the interactive calculator →Common questions
- How much bacteriostatic water for a 30 mg Tirzepatide vial?
- Adding 5 mL of bacteriostatic water to a 30 mg Tirzepatide vial yields 6 mg/mL — 60 mcg in every insulin unit. The reconstituted vial holds 500 units of solution in total.
- How many units is a 5 mg dose of Tirzepatide at 30 mg in 5 mL?
- 5 mg is 0.833 mL of this mix, which is 83.3 units on a U-100 insulin syringe (a U-100 barrel is enough).
- How many 5 mg doses does a 30 mg vial give?
- A 30 mg vial contains 6 full 5 mg doses. Using more or less bacteriostatic water changes the units you draw, never the number of doses in the vial.