Cold Process Soap Calculator
Calculate the lye (NaOH) and water amounts needed for cold process soap making based on oil weight, SAP value, lye concentration, and superfat percentage.
Inputs
oz
%
%
Results
Lye (NaOH) Needed
4.1 oz
Water Needed
8.32 oz
Total Batch Weight44.42 oz
Excess Oil (Superfat)1.6 oz
~4 oz Bars11
How to Use This Calculator
- Enter total oil weight in ounces.
- Set SAP value (NaOH) for your oil blend — look this up in a lye calculator or saponification chart.
- Adjust lye concentration (%) and superfat percentage (5% is typical for skin-safe bars).
- Review Lye (NaOH) Needed, Water Needed, Total Batch Weight, and Excess Oil.
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