Soap Calculator - Lye & INS

One-time purchase soap calc! Solid/liquid (NaOH/KOH), real-time recipe evaluation, INS skin suggestions, cost calc, offline use & iPad.

Soap Calculator is a privacy-first, one-time purchase lye calculator designed for handmade soap makers. Whether you are a hobbyist or running a small business, our tool helps you formulate recipes, calculate costs, and evaluate properties with zero subscription fees.

Core Advantages: Professional & Comprehensive • Real-Time Recipe Evaluation: Dynamically adjust oil and additive ratios using intuitive sliders directly on the results page. Watch properties (like hardness, cleansing, INS) and costs update instantly, making recipe optimization faster and more intuitive than ever. • Smart Recipe Scoring & INS Suggestions: Beyond calculating SAP and INS values, our system provides personalized skin type suggestions (e.g., dry/sensitive vs. oily skin) based on the INS range. A multi-dimensional radar chart visually displays hardness, cleansing, conditioning, and lather properties. • Solid & Liquid Soap Support: Fully supports both solid (NaOH) and liquid (KOH) soap calculations. You can customize lye purity to meet diverse making needs. • 1-Click Cost Calculation: Perfect for small businesses! Input your ingredient prices to automatically calculate total recipe cost and cost per bar. It even supports volume units (like mL, fl oz) and automatically converts oils to weight based on a standard 0.92 g/mL density. • One-Time Purchase: No expensive subscriptions or annoying ads. Buy once, use forever. • 100% Offline & Privacy First: All data is stored locally. The app works perfectly offline—ideal for soap making in workshops or kitchens with poor internet connection.

Key Features: Fast & Flexible • Flexible Inputs & Units: Easily toggle between percentage and weight inputs. Seamlessly switch between metric (g, kg) and imperial (oz, lb) units. • Rich Oil Database: Built-in 170+ common and advanced oils with detailed saponification values and fatty acid profiles, saving you research time. • Recipe Library & Templates: Includes beginner-friendly classic formulas (e.g., pure olive oil soap). Save, organize, and favorite your custom recipes so you never have to re-enter them. • iPad Multi-Device Support: Optimized landscape layout for iPhone and iPad. The iPad version features a split-screen design, making it easier to reference recipes while inputting data. • Making Tips & Guides: Built-in minimalist guides covering essential soap making steps (safety, temperatures, unmolding time) to ensure success. • Save & Share: Generate beautiful image or text reports of your recipes, and log making/unmolding dates directly to your system calendar.

Whether you make facial bars, body bars, liquid soap, or intricate soap carving, this Handmade Soap Calculator provides clear, reliable numbers and tools to elevate your craft!