Soap & Lye Calculator
Full oil blend — lye, water, FO & fatty acid breakdown. Wear gloves. Always test small first.
Batch Settings
Percentages below scale to this weight.
NaOH: 95-100%, KOH: ~90%
0-5% typical. Check IFRA.
Results
Theoretical Lye-
Actual Lye (w/ superfat + purity)-
Water-
Water : Lye Ratio-
Fragrance Oil-
Total Batch Weight-
Batch Property Estimates
Based on fatty acid profiles. Oils without FA data are excluded.
Fatty Acid Breakdown
% of your oil blend for oils with FA data.
Oil Blend
Percentages must total 100%
0.00% / 100%
| Oil / Butter | % | Weight | NaOH SAP | KOH SAP | |
|---|---|---|---|---|---|
| Total | 0.00% | 0.00 | |||
Lye (NaOH/KOH) is caustic and dangerous. Always add lye to water - never water to lye. Wear gloves and eye protection. Weigh precisely. These values are estimates - verify with multiple sources before production.