Soap Calculator – SoapCalc

Simple SoapCalc is a modern soap calculator and lye calculator designed for cold process, liquid soap, and hybrid recipes. Calculate safe lye and water amounts instantly for any soap recipe.

This soap making calculator helps you build, refine, and save soap recipes with clarity and confidence. Whether you're making cold process soap or liquid soap, Simple SoapCalc delivers accurate results without spreadsheets or guesswork.

But it does more than just lye math.

Snap a recipe photo
Import soap recipes from books, blogs, YouTube screenshots, or handwritten notes. This soap calculator reads the image and builds your recipe automatically — no manual entry required.

Refine your oil blend
Use Blend Advisor to improve any soap recipe. Get smart suggestions for stronger bars, more lather, gentler soap, or better balance. Compare variations and apply improvements with one tap.

Build with confidence
• Calculate accurate lye and water amounts for bar soap, liquid soap, and cream soap
• Build soap recipes by weight or percentage
• Adjust superfat, lye purity, and water-to-lye ratio
• View soap properties like hardness, cleansing, and conditioning
• Explore full fatty acid profiles for every oil
• Save and sync soap recipes across devices

Make Soap mode
Switch to a step-by-step workshop checklist using your exact recipe measurements when you're ready to make a batch.

Simple SoapCalc was created to make soapmaking feel calm and clear again — without clutter, spreadsheets, or guesswork.

This soap calculator is designed for beginners and experienced soapmakers who want accurate lye calculations, reliable soap recipe building, and smarter oil blending tools in one app.

Always follow proper soapmaking safety practices when handling lye.

Recent changes:
NEW IN v1.19: THE CUSTOMER FEEDBACK RELEASE

CUSTOM OILS:
🫙 Add an oil we do not have: a name, a SAP value, and it works like any other. Share a recipe and the oil goes with it.

SIGNING IN IS FREE:
🔑 Saving, printing, sharing, water methods and oil details all come with a free account. No subscription needed.

IMPROVEMENTS:
🔧 Clearer wording across the app, plus bug fixes and performance improvements.

Thank you for all the feedback. Keep it coming.