Peptide dosing involves a few conversions that can feel confusing at first. A peptide calculator simplifies this by doing the math for you. Here is how it works and what you need to know.
The core concept: when you reconstitute a peptide, you create a solution with a specific concentration. That concentration determines how far you pull the syringe to get your desired dose.
You need four pieces of information: your syringe size (0.3 mL, 0.5 mL, or 1.0 mL), the peptide vial amount in mg, how much bacteriostatic water you added in mL, and your desired dose in mcg or mg.
The math: concentration = peptide mg divided by water mL. Then dose in mL = (dose in mcg / 1000) divided by concentration. Finally, syringe units = dose in mL times 100, since 1 mL equals 100 units on an insulin syringe.
Example: You have a 10 mg vial, add 2 mL of bacteriostatic water, and want a 250 mcg dose. Concentration is 5 mg/mL. Dose in mL is 0.25 / 5 = 0.05 mL. Syringe units = 0.05 times 100 = 5 units.
Key conversions to remember: 1 mg = 1,000 mcg. 1 mL = 1 cc = 100 units. These never change regardless of the peptide or concentration.
Our free Peptide Calculator handles all of this automatically. Just select your values and it shows you exactly where to pull the syringe, complete with a visual.
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