Free tools for cold process, hot process, and liquid soap makers.
Getting your lye calculation right is not optional in soap making. Too much lye and your bar is harsh. Too little and it won't set properly. These calculators use published SAP values for 30+ oils to give you exact amounts, not rough estimates.
Start with the Lye Calculator to get your NaOH or KOH amount. Then check your oil blend with the Oil Property Calculator to make sure your bar will be hard enough, lather well, and feel conditioning on the skin.
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