soapformulator Lye Calculator

soapformulator works out your lye, water and superfat, and shows where every number comes from. It is the app of soapformulator.com, with the same engine and the same ingredient data as the website. Enter your oils by percentage or by weight. Choose NaOH, KOH or both, the purity of your lye, and how you set the water: lye concentration, water to lye ratio or percent of oils. You get a weigh list, the method with temperatures, bar qualities against their usual ranges, the fatty acid profile and where each acid comes from, and a warning when something is off. About 200 oils, butters and waxes, each with its published values and the sources behind them. 53 essential oils, each checked against IFRA, with their allergens. Additives with their doses and the step they go in at. Hot process, lye and oil master batches, and soaps made from two recipes are handled too. The library has nearly 150 written-up recipes with a method, most with a photo, and the classics of the craft such as castile, bastille and salt bars. When you make a batch, the app takes you through it step by step with the weights and a timer, and keeps the screen on. Log the batch at the end and it counts down the cure and reminds you when the soap is ready. There are tools to resize a recipe, size a mould, and import a recipe from another calculator or a soapformulator.com link. It works offline, in grams or ounces and °C or °F, and in English, German, French, Spanish, Italian, Portuguese, Dutch, Polish, Japanese and Traditional Chinese. An account is optional. Sign in and your recipes stay in step with soapformulator.com and every phone you use. Lye is caustic. Wear goggles and gloves, and add lye to water, never water to lye.