Reconstitution math
Peptide reconstitution calculator
Vial size + bacteriostatic water + your target dose → concentration, how many IU to draw on your insulin syringe, and how many doses per vial. Math runs in your browser; you can verify every step below.
Syringe type
Concentration
2500 mcg/mL
(2.50 mg/mL)
Volume per dose
0.100 mL
Draw to IU on U-100 (or 0.01-mL ticks on tuberculin)
10.0 IU
(10.0 ticks at 0.01 mL)
Doses per vial
20.0
(if you draw 250 mcg every time)
✓ 250 mcg is within the typical 250 mcg – 10 mg range for the peptides we cover. We don't know if it's right for your specific peptide, indication, or protocol.
Common scenarios
- · BPC-157 5 mg + 2 mL water → 250 mcg per 10 IU (U-100)
- · Tirzepatide 10 mg + 2 mL water → 5 mg per 0.1 mL
- · Sermorelin 15 mg + 3 mL water → 500 mcg per 0.1 mL
- · Tesamorelin 5 mg + 1 mL water → 1 mg per 0.2 mL
The math, plainly
- concentration (mcg/mL) = (vial mg × 1000) / water mL
- volume per dose (mL) = dose mcg / concentration
- units on U-100 syringe = volume mL × 100
- units on U-40 syringe = volume mL × 40
- doses per vial = (vial mg × 1000) / dose mcg
U-100 insulin syringes are graduated so 1 mL = 100 IU. U-40 syringes are graduated 1 mL = 40 IU. Standard tuberculin syringes are graduated in 0.01-mL ticks. Always confirm your syringe's graduation before drawing.
This is dose math, not medical advice. We don't know if your target dose is right for you, your peptide, your indication, your body weight, or your prescriber's plan. Discuss any clinical decision with your clinician.