Formulator — Lye Calculator

Precise, safety-aware lye calculations for soap making.

Enter your oils, get an accurate lye and water calculation with superfat control — built for the exact moment in the process where a mistake is expensive.

• SAP-table-backed NaOH and KOH calculations
• Superfat and water concentration control
• A 72-oil catalog, plus manual SAP entry for anything missing
• Built for the one step in soap making where a mistake is expensive