Free cold process soap lye calculator. No account, no sign-up. · How to use this calculator · Compare recipes
Last updated: September 2026
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The calculations, oil data, INCI names, and suggested retail pricing on this site are provided as a guide, not a guarantee. SAP values in particular vary by a few percent between published sources industry-wide, and we've been upfront about our own confidence level on the oils where we're least certain. Always cross-check an unfamiliar oil against a second source, weigh your own lye, and follow proper lye safety practice. We're not liable for the outcome of a batch made using figures from this site.
If you're selling soap, the INCI label generator on this site produces a draft ingredient list to work from - it is not a substitute for checking your actual legal labelling and cosmetic safety obligations in whatever country you sell in.
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