Free Tool
Peptide Reconstitution Calculator
Enter your peptide vial size, bacteriostatic water, and desired dose — get the exact syringe units to draw, a visual guide, and optional cycle planning.
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How to use this calculator
- 1.Select your insulin syringe size — 30, 50, or 100 unit.
- 2.Enter the peptide vial size in mg (e.g. 5 mg for BPC-157).
- 3.Enter the volume of bacteriostatic water you are adding in mL (e.g. 2 mL).
- 4.Enter your desired dose per injection in mcg or mg.
- 5.Read the results — units to draw, concentration, doses per vial.
- 6.Optionally enter doses per day/week and cycle length to see total vials needed.
Common peptide doses for reference
For informational reference only. Always follow your protocol and consult a qualified professional.
Understanding peptide reconstitution
Peptides are supplied as lyophilized (freeze-dried) powder and must be reconstituted with bacteriostatic water (BAC water) before injection. The concentration you achieve depends on how much BAC water you add relative to the peptide amount.
Concentration formula: Concentration (mg/mL) = Peptide amount (mg) ÷ BAC water volume (mL). For example, adding 2 mL to a 5 mg vial gives 2.5 mg/mL.
Syringe units: Insulin syringes are marked in units where 100 units = 1 mL. A 30-unit syringe holds 0.3 mL, a 50-unit syringe holds 0.5 mL, and a 100-unit syringe holds 1 mL. To calculate units to draw: (dose in mg ÷ concentration in mg/mL) × 100.
Example: If your vial is 5 mg reconstituted in 2 mL (2.5 mg/mL), and you want a 500 mcg (0.5 mg) dose — you draw 20 units on a 100-unit syringe: (0.5 ÷ 2.5) × 100 = 20 units.