Soap & Cosmetic Calculators, Charts and Tools
Making soap, lotion and other cosmetics comes down to getting the numbers right. These free soap and cosmetic calculators work out lye and water for cold process soap, convert recipes between percentages and weights, set safe fragrance and essential oil usage rates, and check your emulsifier HLB. Below them, our charts cover INCI names, oil and butter properties, colorants and batch records. Not sure where to start? Use the table below to match your project to the right tool.
Batch Calculator
Turn a recipe written in percentages into ingredient weights in ounces, pounds or grams for any batch size, from a test batch to full production.
Percentage Calculator
Convert a recipe written in weights into percentages so you can scale it up or down and check usage rates.
lye calculator
Our soap making calculator works out the exact lye (sodium hydroxide) and water for your oils, butters and superfat, for cold process and hot process soap.
HLB Calculator
Compare the required HLB of your oil phase with the HLB of your emulsifier blend to see whether your lotion or cream is likely to stay emulsified.
fragrance calculator
Find the safe amount of fragrance oil, essential oil or flavor oil for soap, lotion, lip products and candles, using IFRA-based usage rates for the exact scent you choose.
