Read this first. This tool converts numbers you already have into a volume. It does not contain a protocol, a recommended amount, or a schedule, and it will not suggest one. Every figure you enter comes from you. Inside Your Peptides describes what published protocols used and never prescribes — nothing here is medical advice.
The calculator
Enter what is on the vial and what you intend to measure. The arithmetic runs in your browser and nothing is sent anywhere.
The powder adds negligible volume at these masses, so the water you add is the volume you get. A U-100 syringe is assumed: 100 units = 1 mL, so 1 unit = 0.01 mL.
What the numbers mean
Three quantities, and only one of them is on the label.
| quantity | where it comes from | the trap |
|---|---|---|
| Vial strength | the label | The label states what the vendor says is in there. A certificate of analysis with measured net content is what confirms it — and a vial labelled 50 mg that measures 45 mg is a ten percent price increase nobody announced. |
| Water volume | you choose it | It is arbitrary, and it sets the concentration entirely. More water is not more or less peptide — it only changes how many units of the syringe a given amount occupies. |
| Target amount | you bring it | This calculator will not supply one. Where an amount comes from, and whether it maps onto anything measured, is the subject of our dosing fundamentals. |
The step people get wrong
Concentration is a ratio, and ratios are where mental arithmetic fails quietly. The same 10 mg vial is 10000 mcg per mL with 1 mL of water and 3333 mcg per mL with 3 mL — the vial has not changed, but the number of syringe units for the same amount has tripled. Neither setup is more correct. The error is carrying a units figure learned under one dilution across to a vial reconstituted under another.
The second common error is treating units as a mass. Units are a volume marking on a syringe barrel. They mean nothing about peptide content until you know the dilution, which is exactly the number this tool makes explicit.
For storage, handling and the rest of the method, our reconstitution fundamentals cover what the arithmetic does not.
Questions we get
How do you calculate peptide concentration after reconstitution?
Concentration is vial strength divided by the volume of bacteriostatic water added. A 10 mg vial reconstituted with 2 mL gives 5 mg per mL, which is 5000 mcg per mL. The powder adds negligible volume at these masses, so the water volume is the volume.
What is a unit on an insulin syringe?
On a U-100 syringe, 100 units equals 1 mL, so one unit is 0.01 mL. A unit is a volume marking, not a mass. How much peptide sits in one unit depends entirely on how much bacteriostatic water was used.
Does this tell me what dose to take?
No. It converts numbers you already have into a volume. It carries no protocol, no recommended amount and no schedule. Nothing on this site is medical advice.