Free · iOS · by Peptide Watchdogs

PepSync — the peptide calculator in your pocket.

Reconstitution and dosage math for any research peptide, done in seconds. Enter your vial and bacteriostatic water; get concentration, units to draw, and draws per vial. Saved vials and quick presets, offline. Research use only.

App Store link is a placeholder — it goes live when the listing URL is added.

Any peptide

Reconstitution, concentration, units to draw, and draws per vial — for retatrutide, tirzepatide, semaglutide, BPC-157, and anything else.

Saved vials

Keep your common vial sizes and water volumes on hand so you're not re-typing the same numbers.

Works offline

All math runs on-device. No account, no tracking, no connection needed at the bench.

Research-honest

Built by Peptide Watchdogs. It's arithmetic only — no dosing claims, no medical advice, ever.

Try it right here

The same engine that powers the app. Enter your numbers — no download needed. Research math only.

Inputs

mg
ml
mcg
Vial:
Water:

Units assume a U-100 syringe (100 units = 1 ml). This is research math only, not dosing or medical advice.

Results

Units to draw-
Liquid volume per draw-
Concentration-
Per unit-
Draws per vial-

Round physical measurements carefully and follow your lab protocol.

Popular calculators

Retatrutide Tirzepatide Semaglutide BPC-157 Tesamorelin PT-141 See all

Frequently asked

What is PepSync?
A free iOS peptide reconstitution and dosage calculator. Enter vial mg and bacteriostatic water; get concentration, units to draw, and draws per vial. Research-use math, not medical guidance.
Is it free?
Yes — free on the App Store, and the web version is free too.
Does it give dosing advice?
No. It's reconstitution and concentration arithmetic for laboratory research only, with no recommendation about human or veterinary use.