Design better handmade soap formulas. Easily calculate NaOH/KOH, check fatty acids, fine-tune superfat, and preview hardness, lather, INS & cost in real time.
Design perfect soap recipes in seconds.
Soap Calculator is a professional, offline lye calculator designed for handmade soap makers and hobbyists who want precise measurements without complicated setups.
Choose your base oils, set your batch size, and instantly get the exact NaOH or KOH required. As you tweak your ingredients, watch your soap's hardness, cleansing, lather, INS scoring, and total cost update in real-time.
Core Tools & Features: Real-time evaluation, multi-dimensional scoring, 100% offline usage with local storage, flexible units, recipe saving & sharing, classic templates, and a built-in database of over 170 oils.
Basic features are free forever, with a one-time Pro unlock (no ads or subscriptions).
Ratings & Reviews
This app has not received enough ratings or reviews to display an overview.
1. New Cost Optimization in Smart Optimize: using your entered ingredient prices, it automatically adjusts oil ratios to cut costs without lowering your recipe score — with Gentle, Balanced, and Aggressive intensity levels
2. Input & language polish: added a "Done" button to many input fields and fixed remaining text that still showed in Chinese in the English interface
Version 3.4
The developer, 瑜 张, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary based, for example, on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Provider
瑜 张
Size
4.2 MB
Category
Lifestyle
Compatibility
Requires iOS 16.6 or later.
iPhone Requires iOS 16.6 or later.
iPad Requires iPadOS 16.6 or later.
Mac Requires macOS 13.5 or later and a Mac with Apple M1 chip or later.
