Free Soap Calculator

A soap calculator is a tool that automatically calculates the exact amounts of lye and water needed for your soap recipes based on the oils you select. It uses SAP (saponification) values to ensure chemical accuracy and balance.

A soap calculator uses SAP values (the amount of lye needed to saponify each oil) and your selected oils to calculate exact lye amounts. It also accounts for superfat percentage, water calculation methods, and lye concentration to give you precise measurements.

A lye calculator focuses specifically on calculating lye amounts. A soap calculator is broader and helps calculate all recipe components including lye, water, and provides estimated soap properties like hardness, cleansing power, and conditioning.

Yes! This soap calculator supports both cold process bar soap (using NaOH) and liquid soap (using KOH). Simply select your lye type and the calculator will adjust the amounts accordingly.