Build an oil blend, calculate NaOH or KOH, review indicative soap properties and inspect the fatty-acid profile. Inspired by the clarity of specialist soap calculators, with an original Floreva interface.
02
Added oils
Oil / butterWeight (g)
Total oils1,000.0 g
03
Lye + water settings
04
Optional additions
Powders, liquid additives and infused oils are recorded here only. They never change the lye, water or oil calculation.
Formula analysis
Soap properties
Indicative values derived from the selected oils’ typical fatty-acid profiles. Highlighted bands show commonly used planning ranges, not pass/fail limits.
Hardness
38
Planning range 29–54
Cleansing
20
Planning range 12–22
Conditioning
58
Planning range 44–69
Bubbly
20
Planning range 14–46
Creamy
18
Planning range 16–48
Longevity
18
Planning range 25–50
Iodine67
INS146
Cold-process balance is within the practical range
For a stable hard bar, aim for Iodine 50–65 (keep below 70) and INS 145–160. A luxury blend is usually best at Iodine 55–62, INS 145–155 and 5–7% superfat.
Cold-process bath soap guide
Balanced, premium bar targets
Use these as practical formulation targets; do not chase one number at the expense of the overall oil blend.
HardnessPlanning 29–54Target 38–45
CleansingPlanning 12–22Target 12–16
ConditioningPlanning 44–69Target 52–62
BubblyPlanning 14–46Target 18–25
CreamyPlanning 16–48Target 20–30
LongevityPlanning —Target 20–30+
Hardness and longevity: use palm, coconut and butters to retain a firm, long-lasting bar.
Sunflower: keep regular sunflower around 10–15%, unless using high-oleic sunflower oil.
Lather: if bubbly lather is low, a small increase in coconut or castor oil can help. Allow a full 5–6 week cure for softer, conditioning blends.
Fatty-acid profile
Lauric14.4%
Myristic6.0%
Palmitic14.9%
Stearic3.0%
Ricinoleic0.0%
Oleic41.4%
Linoleic15.6%
Linolenic1.0%
Read before making soap
Lye is corrosive. Calculation is only one part of safety.
Wear suitable eye protection, gloves and protective clothing. Work in a ventilated, interruption-free area away from children and animals.
Always add lye slowly to water—never pour water into lye. Use heat-safe, lye-compatible equipment and an accurate scale.
SAP and fatty-acid values vary by source and batch. Verify the supplier assay, selected SAP values, formula and method independently before production. This calculator is a planning aid, not a tested recipe.
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