Peptide reconstitution calculator
Mixing a vial sets its concentration, and the concentration decides which mark on the syringe a dose corresponds to. This does that arithmetic and shows where the result falls on the barrel.
Everything happens in your browser. No figure you type is sent anywhere, stored, or logged.
What is in the vial
The figure printed on the vial or the box, before any water is added.
How much liquid you are mixing in. This sets the concentration and nothing else.
A single dose, not a daily or weekly total.
What to draw
Fill in all three figures and the result appears here, with the fill level marked on the barrel.
What this does not tell you
It converts one number into another. It has no opinion on whether a dose is sensible, safe, or worth taking, and it cannot know what is actually in a vial. Most compounds people reconstitute are not approved for human use anywhere, and a figure on a label is a claim rather than a measurement.
Educational content only. Nothing here is medical advice, and most compounds discussed are not approved for human use. Talk to a clinician before acting on anything you read. Full disclaimer.
The arithmetic
- Concentration
- (peptide mg × 1000) ÷ water mL
- mcg per mL
- Volume to draw
- dose mcg ÷ concentration
- mL
- Insulin units
- volume mL × 100
- 1 mL = 100 units on a U-100 syringe
One microgram is a thousandth of a milligram, which is where most arithmetic errors on this subject come from. A dose entered in the wrong unit is out by a factor of a thousand, and the calculator cannot catch that for you.
The steps either side of this
The number this produces is only as good as the mixing that came before it and the measuring that comes after.
How to reconstitute a peptide vial
Turning a freeze-dried powder into a solution, and the handling details that decide whether the vial survives it.
Choosing needles and syringes
What the numbers on a syringe wrapper mean, and how to pick a barrel small enough to read the dose you are measuring.
Subcutaneous injection technique
The standard procedure for a fat-layer injection, the sites it uses, and why rotating between them is not optional.
Injection site problems and warning signs
Telling an ordinary bruise from cellulitis, an abscess or an allergic reaction, and knowing which of them cannot wait.