App Store
PepCalc: Peptide Calculator
PepCalc: The top-rated peptide calculator app! As featured on leading podcasts including Ben Greenfield, Data Driven Radio, and more.
PepCalc is a mathematical utility for laboratory researchers and scientists. It provides a digital interface for solving complex reconstitution ratios in educational settings.
Stop the guesswork! PepCalc is the simplest way to get peptide reconstitution right. Instant per unit or tick mark results, saved protocols for repeatable calculations, multi-peptide blend support, and smart conversions. Download PepCalc and get answers in seconds.
How it works:
1. Enter your peptide amounts and water volume.
2. Choose your units and tick marks.
3. See instant results.
Features:
FLEXIBLE INPUTS: Set peptide amounts, water volume, units and tick marks, and target amount.
PRESETS: Choose 100-unit or 40-unit scales for fast setup, or use fully custom inputs for any volume.
MULTI-PEPTIDE BLENDS: Add unlimited peptides to a single volume and calculate each automatically for complex research.
SMART CONVERSIONS: Instantly switch between mcg, mg, and g without re-entering data.
SAVED PROTOCOLS: Save favorite calculations with names and notes for fast recall. No more retyping.
THEMES: Multiple themes with light and dark mode support to suit everyone's preferences.
PRIVATE BY DESIGN: No signup required. No ads. Your data remains on your device.
DISCLAIMER: PepCalc is for research and educational purposes only. Not for medical use. This app does not provide medical advice.
View Raw Thread
Developer & User Discourse
Gina0011 • Jun 9, 2026
★ 5
I tried many of the “free” apps. They were super annoying trying to force me to subscribe. This app after a one time payment and does everything i want. Thanks!
jenmiko • Jun 6, 2026
I thought I as charged twice but I wasn’t. I reached out via email and Someone Got Back to me!!
aimeehar • May 4, 2026
Update- reached out to Support and they fixed the app in a matter of days.
All of a sudden, when I edited then saved the calculation to a saved protocol, it deleted all the notes that were there previously, which had not occurred in the past. It's also not letting me edit notes in saved protocols.
All of a sudden, when I edited then saved the calculation to a saved protocol, it deleted all the notes that were there previously, which had not occurred in the past. It's also not letting me edit notes in saved protocols.
Jayymo1342 • May 4, 2026
Best app to use for calculating protocols! Customer support is wonderful! I had an issue with the app and they immediately got back to me through email. Fixed the issue and check in with me to make sure I was up to date and not was working well. I use this app so much and appreciate the help I got from them! Love this app!
Waste of money111 • Apr 15, 2026
The app does not let you update and save the calculator do not make the mistake I did by purchasing.
Eric 2575 • Mar 24, 2026
You won't find a better peptide app on any app store
Kudos guys! Great work.
Kudos guys! Great work.
Pilotphil30 • Mar 24, 2026
You should be able to toggle the desired dose from mcg to mg
Dave G-Smith • Mar 1, 2026
Have been waiting for the ability to calculate blends with more than three peps but still not available. Otherwise solid features.
Lagfam • Feb 20, 2026
It does exactly what I need it to do, just put in the information, know what dose you want to take, and you are good to go
midliferancher • Feb 2, 2026
This calculator is easy to use and I can track all my peptides and notes in a user friendly format.
Tonybees-1 • Jan 19, 2026
Takes the guess work out!!!
The Inappropriate Moose • Dec 26, 2025
Good app but there’s better options available now for half the price
Moosbsi • Dec 18, 2025
There’s better apps out there for free, it’s kinda boring
Buggy with Apple TV • Oct 20, 2025
Ability to measure multiple peptide dosages in one syringe..like the Wolverine protocol . Quite efficient
Doug Smith • Sep 19, 2025
I was highly confused when it came to mixing peptide powders with water and then injecting, but this app made it easy. The founder even answered a question I had through email. Highly recommended.
Jason H.P • Aug 5, 2025
works well, love saved protocols
bbman911 • Jun 19, 2025
Decent app which has saving capabilities which is nice to keep track of stuff. Would love other peptide related calcs like water amount recommendations which is trial and error otherwise. Also when editing a save you want to update, it’s possible to overwrite other saves since it’s a drop down. Nice to have local than rely on a website, but more is warranted for a paid app.
oppjopp • Jun 8, 2025
I wouldn’t have bought this had I known they didn’t give a milligram option. Wasted my money.
GollyJer • Jun 4, 2025
Many peptide calculators don’t work well when switching from the small phone screen to larger screen sizes. Now I’m a peptide pro regardless of my device.
kargo27 • May 15, 2025
I didn’t quite understand micrograms compared to milligrams, even though I love the metric system and understand it. It took me a minute to figure out that micrograms are the measurements used in the dosing, whereas milligrams is just a general weight or concentration of the medicine. All that to say that by working with this app, it helped to solidify my understanding of it all.
SaaS Metrics