Saponification Value Calculator

The saponification value of a fat or oil tells you how much alkali is needed to fully convert it into soap — a key measurement in soap-making, food science, and quality control. Enter your blank titration volume, sample titration volume, HCl molarity, and sample weight into the Saponification Value Calculator to get the result in mg KOH/g. Secondary outputs include NaOH and KOH required per gram of oil and an oil quality assessment, with an optional reference comparison if you select your oil/fat type.

ml

Volume of HCl used in blank titration

ml

Volume of HCl used in sample titration

mol/L

Molarity of hydrochloric acid solution

g

Weight of fat or oil sample

Optional: Select oil type for reference comparison

Results

Saponification Value

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NaOH Required per 1g Oil

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KOH Required per 1g Oil

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Oil Quality Assessment

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Results Table

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Frequently Asked Questions

What is saponification value?

Saponification value (SV) is the amount of potassium hydroxide (KOH) in milligrams needed to completely saponify one gram of fat or oil. It indicates the average molecular weight of fatty acids in the oil and helps determine soap-making properties.

How can I calculate the saponification value of oils?

Saponification value is calculated using the formula: SV = (Blank - Sample) × Molarity × 56.1 / Weight, where Blank and Sample are titration volumes in ml, Molarity is the HCl concentration, and Weight is the sample weight in grams.

What does a high saponification value mean?

A high saponification value indicates the presence of shorter chain fatty acids in the oil. Oils with high SV values (like coconut oil) produce harder soaps with more lather, while low SV oils create softer, more conditioning soaps.

Is saponification value the same as saponification number?

Yes, saponification value and saponification number are the same thing. Both terms refer to the mg of KOH required to saponify 1g of fat or oil. The terms are used interchangeably in soap making and oil analysis.

What is the typical saponification value range for different oils?

Coconut oil has a high SV (248-265), olive oil has a medium SV (184-196), while oils like jojoba have very low SV (92-95). Most common soap-making oils range between 135-265 mg KOH/g.

Why is saponification value important in soap making?

Saponification value determines exactly how much lye is needed to convert oils into soap. Using the correct amount prevents excess lye (caustic soap) or insufficient lye (oily, soft soap). It's essential for creating safe, high-quality soap.

How accurate should my saponification value measurement be?

Saponification value measurements should be accurate to within ±2-3 units for soap making purposes. Professional soap makers often use safety margins (superfat) of 5-8% to account for small variations and ensure complete saponification.