r/u_PepTrac•
PepTrac

Hear ye, hear ye — get yer free peptide calculators here!

Hello Fellow Peptide Lovers!

Wanted to share this because we know a lot of people are just looking for a free online peptide calculator and do not necessarily want a whole app.

We’re the team behind PepTrac, and we put our peptide calculators on the website so anybody can use them:

https://peptrac.com/free-peptide-calculators/

PepTrac is iPhone-only, but we did not want the calculators to only be available inside the app.

The page includes a few different tools depending on what you need:

EasyDose — probably the easiest place to start. You put in what’s in your vial and the dose you want, and it tells you how much BAC water to add and how much to inject.

Custom Concentration — for people who already know the injection size they like using and want to build the mix around that.

Fill to Capacity — useful if you want to fully fill a pen cartridge or make a longer-lasting prep from a full 3 mL fill.

Step Up — for titration protocols where you’re starting lower and increasing over time.

Intranasal — for nasal spray mixing based on peptide amount, target dose, and sprays per dose.

These same calculators are also in the PepTrac app. The app is free to download and use for 7 days, and even if someone does not subscribe after the trial, the calculators still stay available in the trial version. PepTrac is a privacy-first peptide tracking app, we're happy to tell there's no name, email, anything required to use the app.

Here's a link to download for anyone that wants to check it out.

Mostly we just wanted these tools to be easy to access, whether somebody wants a peptide tracking app or just needs a peptide reconstitution / dosing calculator.

Happy Calculating!

Posted Apr 5, 2026, 2:46 AM UTC

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