Calculators / Retatrutide dose charts

Retatrutide dose charts (mg → U-100 units)

Units to draw on a standard U-100 insulin syringe, for each common Retatrutide vial size and BAC-water volume. Doses shown reflect ranges reported in published research — they are reference points for the math, not recommendations. For other numbers, use the live calculator.

5 mg vial

Dose+ 1 mL water (5 mg/mL)+ 2 mL water (2.5 mg/mL)+ 3 mL water (1.6666666666666667 mg/mL)
1 mg20 u40 u60 u
2 mg40 u80 u> syringe
4 mg80 u> syringe> syringe
8 mg> syringe> syringe> syringe
12 mg> syringe> syringe> syringe

10 mg vial

Dose+ 1 mL water (10 mg/mL)+ 2 mL water (5 mg/mL)+ 3 mL water (3.3333333333333335 mg/mL)
1 mg10 u20 u30 u
2 mg20 u40 u60 u
4 mg40 u80 u> syringe
8 mg80 u> syringe> syringe
12 mg> syringe> syringe> syringe

20 mg vial

Dose+ 1 mL water (20 mg/mL)+ 2 mL water (10 mg/mL)+ 3 mL water (6.666666666666667 mg/mL)
1 mg5 u10 u15 u
2 mg10 u20 u30 u
4 mg20 u40 u60 u
8 mg40 u80 u> syringe
12 mg60 u> syringe> syringe

30 mg vial

Dose+ 1 mL water (30 mg/mL)+ 2 mL water (15 mg/mL)+ 3 mL water (10 mg/mL)
1 mg3.3 u6.7 u10 u
2 mg6.7 u13.3 u20 u
4 mg13.3 u26.7 u40 u
8 mg26.7 u53.3 u80 u
12 mg40 u80 u> syringe

Formula: units = dose ÷ concentration × 100 · concentration = vial mg ÷ water mL · Retatrutide half-life ≈ 6 days (Retatrutide phase-2 pharmacokinetics (Jastreboff, NEJM 2023; half-life ≈6 days))

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