PepCalc: Peptide Calculator

4.6
282 reviews
Content rating
Everyone
5K+
Downloads
Content rating
Everyone
Learn more
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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
Jun 25, 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

4.7
276 reviews
Ernest Loyer
April 13, 2026
Love the app, just don't like the annoying floating purple banner covering the calculation entries as you input. Note: I have a 7.2" smartphone screen too, so it's not phone specific, but by design. I would have given it 5 stars had that been permanent on the bottom. Also, it defaults to 100 units (U-100) even though I base my calculations (more often than not) on .5mL (50 units). Although it appears you can change it, you can't.
1 person found this review helpful
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Awesome Labs LLC
April 29, 2026
Hi Ernest, that purple floating banner is the reason most people use the app. It allows you to adjust the inputs while seeing the impact on your draw amount in real time. Please reach out with screenshots to hello@supptrack.app. Maybe it looks different on your device. We are happy to update the app to work better for you if this is the case.
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.
14 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! 🍻
Burton Nuse
May 7, 2026
It's an okay calculator. Easy to used, but it would be nice to have the ability to set different dosage values when creating a custom blend. Everytime you change the dose value of one, it changes the rest of the values to the same value.
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Awesome Labs LLC
May 8, 2026
Thanks for using PepCalc! We'd have added this feature if we could, but all peptides in a blend are mixed like smoothie ingredients. Your syringe draws them together in the same ratio they were mixed. To change the ratio, adjust the amount in Vial Details before mixing. If you bought a pre-mixed vial, sadly, you're stuck with the maker's ratio.

What’s new

• NEW! PROTOCOL SHARING & IMPORT: Create & share beautiful protocol images directly via social media, chat & email that other PepCalc users can import directly via link or QR code
• UNLIMITED MIXES: Add and name as many peptides as needed
• NEW RESEARCH TAB: Your peptide reference, inside PepCalc
• REBUILT PROTOCOLS: Faster flow to save, rename, & update favorites
• THEME IMPROVEMENTS: Brighter, more readable accent color in dark mode
• SHARE: Share PepCalc with a friend from the More tab