Soap Lye Calculator

About This Tool

Our soap lye calculator is a dedicated online tool designed for soap makers seeking accurate, reliable measurements of lye in their recipes. Simply input your oils’ weights, select the oils from a predefined list, and adjust the superfat percentage. The calculator then computes the exact grams or ounces of sodium hydroxide required for saponification, considering your recipe's oil blend.

This tool is ideal for hobbyists, small business owners, and professional formulators striving for consistent, safe soap products. It supports multiple oil types, offers optional adjustments for soap hardness and cure times, and provides detailed outputs including safety tips. Whether you’re creating cold process soaps or experimenting with new formulations, this tool helps you craft balanced and safe recipes accurately.

Designed with simplicity and precision, the calculator ensures users avoid common formulation errors, minimizes waste, and optimizes production safety. Advanced features like calculation history and export options are available for users aiming for long-term project management or batch documentation.

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