PepCalc: Peptide Calculator

4.8
270 reviews
5K+
Downloads
Content rating
Everyone
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About this app

PepCalc: The top-rated peptide calculator app! As featured on leading podcasts including Ben Greenfield, Data Driven Radio, and more.

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.
Updated on
Apr 07, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

4.8
265 reviews
Robin Chamberlain
March 21, 2023
No menu, no reset button. Very user unfriendly. To change an amount, you have to go back and delete the inputted boxes, then type the new number. The issue is that in doing it this way, it keeps the error window up (because all fields must be filled out) and won't show the info for that box (such as how many syringes of water to draw) because the "error" is in that box.
13 people found this review helpful
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Awesome Labs LLC
March 24, 2026
Hi Robin. Please go to the bottom of the Info tab and ensure you are on version 55.2.2. There's a host of new features. Importantly for you we've added a completely new "reset" function that makes it dead simple to clear the calculator. We'd love to earn 5 stars from you. Cheers! šŸ»
John Crowe
March 28, 2026
It would be helpful to be able to decide if I want my draw amount to show as mg or mcg. Update 3.24.26: App has been updated to include conversion to mgs. That's wonderful. Unfortunately this update has included a new splash screen on startup and ridiculously slowed the app down. Update 3.28.26: 5 stars! The splash screen is gone and, more importantly, the scrolling through saved protocols no longer lags. I know I was harsh with my reviews but I do honestly appreciate this app!
3 people found this review helpful
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Awesome Labs LLC
March 26, 2026
Hi John, your a tough one to please. I like it! We spent a couple days optimizing startup time. The extra "ā™„ļø" animation on the splash screen is no longer needed. The load speed is now ~60% faster. Thanks for pushing on this. When you open the app you should see 55.2.3 at the bottom of the Info tab. 5-stars now? šŸ˜€
Raj Saini
March 24, 2026
the app is great for your pep calculations, but I wish there was an option to add more than 3 peptides
4 people found this review helpful
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Awesome Labs LLC
March 24, 2026
Hi Raj, to earn our fifth star we've made your wish our command. Please go to the bottom of the Info tab and ensure you are on version 55.2.2. This version has a whole host of new features. One of which is the ability to add as many peptides to your protocol mix as your heart desires. 🄳

What’s new

• UNLIMITED MIXES: Add and name as many peptides as needed.
• EXPANDED SCALES: Standard 100/40-unit & custom scale support.
• REBUILT PROTOCOLS: Faster flow to save, rename, & update favorites.
• RICH NOTES: Full-screen notes with formatting & 1,000-char limit.
• AUTO-CONVERSION: Real-time mcg/mg/g switching.
• UNDO: 7-second window to revert actions.
• THEMES: 5 new schemes with auto Light/Dark mode.
• Global decimal (comma/period) support.