Peptide Calculator: PepStack

The peptide calculator that actually tracks your protocol.

Ozempic. Wegovy. Mounjaro. Zepbound. Semaglutide. Tirzepatide. Retatrutide. BPC-157. Whatever you're running, PepStack handles the math, the logging, and the data without ever touching your personal information.

No account. No cloud. Your data stays on your device.

RECONSTITUTION CALCULATOR

The most accurate peptide reconstitution calculator on Android. Enter your vial size, BAC water volume, and desired dose and get the exact draw volume instantly. Works for every GLP-1 compound and research peptide.

INJECTION SITE BODY MAP

Visual injection site rotation tracker. See exactly where you last injected and where to go next. Reduce scar tissue buildup. Never hit the same spot twice.

DOSE ESCALATION SCHEDULES

Built-in semaglutide, tirzepatide, and retatrutide escalation presets. Follow standard protocols or customize your own schedule. No searching. No guesswork.

SYMPTOM LOGGING

Log 12 symptoms per dose. Track nausea, fatigue, appetite changes, and more over time. Spot patterns across your GLP-1 protocol and bring real data to your provider.

WEIGHT AND PROGRESS ANALYTICS

Weight line chart. 30-day dose bar chart. Injection site usage. Compound totals. See what your protocol is actually doing, not just what you hope it is.

COMPLETELY PRIVATE

No account required. No cloud sync. No ads. Everything lives locally on your device. Your peptide and GLP-1 data belongs to you alone.

BUILT FOR

► Semaglutide users (Ozempic, Wegovy)

► Tirzepatide users (Mounjaro, Zepbound)

► Retatrutide users

► BPC-157 and research peptides

► TRT and hormone optimization protocols

Download free. Track smarter.