Peptra: Peptide Calculator

Reconstitute right. Enter your vial size and bacteriostatic water — Peptra shows the exact concentration (mg/mL) of your mix. You enter every value; it makes no dosage recommendation. Then track your doses, stack, and vials.

THE CONCENTRATION CALCULATOR (free, forever)
Stop doing the math in your head. Enter the mg in your vial and the mL of BAC water — see the exact concentration of your mix (mg/mL and mcg/mL). You read the concentration and decide everything else yourself.

TRACK YOUR STACK
Log every dose — peptide, amount, site, time. See your history, rotate injection sites, and never lose track of what you took and when. Blends supported, with a per-component breakdown.

NEVER WASTE A VIAL
Reconstituted peptides don't last forever. Peptra reminds you before a vial expires — and when it's time for your next dose.

ASK, LEARN (Pro)
Have a question about a peptide? Ask — get a clear, educational answer from public literature. No dosing advice, ever. Just knowledge, honestly framed.

A REFERENCE YOU CAN READ
Neutral, general info on common peptides — typical reconstitution, half-life, storage. Reference only.

PRIVATE BY DESIGN — AND HONEST
Your data stays on your device. No account required. No ads, no store, no paywall before you've seen the app. The calculator is free, forever.

Peptra is a logging and calculation tool — not medical advice, diagnosis, or treatment, and it does not recommend using any substance. Consult a healthcare professional. Some peptides may not be approved for human use.

Free: full calculator, library, 1 tracked peptide, 7-day history.
Pro: unlimited peptides & history, reminders + vial-expiry alerts, Ask-AI, CSV export.

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