PepCalc: Peptide Calculator

New! Create and share beautiful protocol images directly via social media, chat, and email that other PepCalc users can import directly via link or QR code.

Say hello to the Research tab. Your peptide reference, inside PepCalc. Easier on the eyes: Brighter, more readable accent color in dark mode. Share PepCalc: Share PepCalc with a friend from the More tab.

The "Unlimited & Customizable" update is here! We've listened to your feedback and completely overhauled PepCalc to make it the most powerful and flexible peptide research tool available. What's New: • UNLIMITED MIXES: You are no longer limited to one or two peptides. Mix as many peptides as your research requires in a single volume. • CUSTOM NAMING: Say goodbye to "Peptide 1" and "Peptide 2." Give every peptide in your mix a custom name for perfect clarity. • EXPANDED SCALE OPTIONS: We've simplified the unit picker with all standard 100-unit and 40-unit types, plus the ability to define your own non-standard custom scale types. • 10x EASIER PROTOCOLS: The "Save Protocol" flow has been entirely rebuilt. It is now faster than ever to add, update, or rename your favorite calculations. • FULL-SCREEN RICH NOTES: Protocol notes are no longer confined to a tiny box. Enjoy a full-screen interface with bold, italic, and underline formatting, plus an increased limit of 1,000 characters. • AUTOMATIC UNIT CONVERSION: Switch between mcg, mg, and g in real time with our improved calculation engine. • "UNDO" FUNCTIONALITY: Made a mistake? You now have a 7-second window to undo major actions, like clearing data or opening a saved protocol, via a simple in-app notification. • WATER SOLVER: PepCalc can now solve backwards from your desired amount to calculate how much water to add. • THEMES GALORE: Express yourself with 5 new color schemes, each featuring native Light and Dark mode support that adapts to your device settings automatically. • GLOBAL COMPATIBILITY: All inputs now seamlessly accept both commas and periods as decimal separators for our researchers worldwide. Love PepCalc? Please consider leaving us a review! Your feedback is greatly appreciated.