What Peptide Calculator is, what it does, and — just as important — what it deliberately does not do.
What this site is
Peptide Calculator is a free educational reference site built around one tool: a reconstitution calculator. Peptides are supplied as freeze-dried powder in vials; before a dose can be measured, the powder is mixed with bacteriostatic water, and the user has to convert a dose written in milligrams or micrograms into a mark on an insulin syringe. That conversion is where mistakes happen, and it is the only problem this site exists to solve.
What the calculator does
The calculator performs arithmetic — nothing more. You enter three numbers you already have (the vial size printed on your label, the water you added, and the dose you were given), and it returns the concentration, the volume per dose, the U-100 syringe units and the doses per vial, with every step of the working shown so you can check it yourself. Alongside the main calculator, the site publishes a page for each commonly searched peptide with that peptide’s usual vial sizes pre-set, plus plain-language guides to reconstitution, syringe units and the mg/mcg conversion.
What it does not do
- It does not recommend a dose, a schedule or a protocol for any substance — ever. Every dose field on this site is blank for you to fill from your own prescription.
- It does not say whether any peptide works, is safe, or is appropriate for anyone.
- It does not sell anything, carry advertising for peptide suppliers, or link to sellers.
- It is not a substitute for a licensed healthcare provider or pharmacist, who remain the only people qualified to advise on your dose and preparation.
Who it is for
Anyone who has been given a dose by a qualified professional and needs to convert it into syringe units accurately — and anyone who simply wants to understand the maths well enough to double-check a figure they were handed. The guides are written for complete beginners: no prior knowledge of units or syringes is assumed.
How the site is run
The site is free to use, needs no account or sign-up, and the calculator runs entirely in your browser — the numbers you type are never sent to or stored on a server. If you spot an error in a formula or a page, please tell us via the Contact page; accuracy is the entire point of the site, and corrections are made promptly. Before relying on any figure here, please also read the Medical Disclaimer.