Soap Calculator – SoapCalc
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28 reviews
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About this app
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.
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.
Soap calculator & lye calculator for cold process and liquid soap
Updated on
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Ratings and reviews
25 reviews
marlene Carras
- Flag inappropriate
August 17, 2026
hard to use due to too much information and inability to see the entire page while choosing each oil the way it once was.
Redefined Threads
August 17, 2026
Hi Marlene, thank you for the feedback. I’m sorry this has affected your experience. I understand what you mean about the oil list, and I’ll take another look at how that information is displayed to improve the experience.
If you notice anything else or have ideas, please use Feedback in Settings so I can address things more quickly.
jok starkey
- Flag inappropriate
April 7, 2026
It works alright. I don't think it saves locally because the option to save isn't always there, like it relies on cloud storage. In the unlikely event that I don't have service, how would I retrieve my recipes? I can afford an SD card, and I prefer having that as a backup for the cloud, not the other way around.
Redefined Threads
April 20, 2026
Thanks for the feedback! Simple SoapCalc is local-first — once you sign in (free account), recipes save directly to your device and are always available offline. Pro adds cloud backup on top. If that's not matching what you're seeing, please email support@simplesoapcalc.com and I'll help you sort it out.
Fayola IKE
- Flag inappropriate
July 2, 2026
The BEST app for those making cp soap. I absolutely love it !
Redefined Threads
July 2, 2026
Thank you so much, Fayola! It means a lot to hear you love it. I’m thrilled that Simple SoapCalc has been helpful for your CP soapmaking journey. Feedback like this keeps me motivated to keep improving the app, and if you ever have ideas or feature requests, I’d love to hear them. Happy soaping!
What’s new
NEW IN v1.17.1:
🧼 A Calmer Recipe Screen — usage guidance now waits behind the ⓘ, so you see more of your recipe. Thanks to those who told us.
💬 Feedback From The Calculator — something confusing or wrong? Tell us right where you are.
🔧 Bug fixes and performance improvements
🧼 A Calmer Recipe Screen — usage guidance now waits behind the ⓘ, so you see more of your recipe. Thanks to those who told us.
💬 Feedback From The Calculator — something confusing or wrong? Tell us right where you are.
🔧 Bug fixes and performance improvements
App support
About the developer
James Hogans Jr
redefinedthreadsdev@gmail.com
2201 E Lee Rd
Smyrna, GA 30080-5907
United States