Peptide calculator
Enter the vial size, how much bacteriostatic water you added and the dose you want. It gives you the units to draw on a U-100 insulin syringe.
Start from a vial we have reviewed
Draw this much
5units
on a U-100 (1ml) insulin syringe, which is 0.05 ml
- Concentration
- 5 mg/ml
- Per unit
- 50 mcg
- Doses per vial
- 40
How the number is worked out
There is only one sum here, and it is worth understanding rather than trusting. Dividing the peptide in the vial by the water you added gives the concentration in mg per ml. Your dose divided by that concentration gives the volume to draw. A U-100 insulin syringe is marked in hundredths of a millilitre, so multiplying that volume by 100 gives the units.
The water volume changes nothing about how much peptide you take. It only changes how far up the barrel the same dose sits. More water means a longer, easier-to-read draw. Less water means a shorter one. Pick whatever puts your usual dose somewhere you can measure confidently.
Our reconstitution guide walks through the same maths slowly, with worked examples, and the dosing hub covers what the published protocols actually say for each compound.
What this is not. A calculator converts numbers. It does not tell you a dose is appropriate, safe, or legal for you. Everything these vendors sell is labelled for research use, nothing here is medical advice, and the preset doses are drawn from published protocols for reference rather than as a recommendation.
Common questions
Divide the peptide in the vial (mg) by the bacteriostatic water you added (ml) to get mg per ml. Divide your dose by that figure to get millilitres, then multiply by 100 for units on a U-100 syringe. The calculator above does all three steps.
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