Enter the weight of the sample and the volume of the solution into the calculator to determine the saponification value. This calculator can also evaluate any of the variables given the others are known.

Saponification Formula

The following formula is used to calculate the saponification value.

SV = (56.1 * W) / V


  • SV is the saponification value (mg KOH/g of fat) W is the weight of the sample (g) V is the volume of the solution used (ml)

To calculate the saponification value, multiply the weight of the sample by 56.1, then divide the result by the volume of the solution used. The result is the saponification value, which indicates the amount of potassium hydroxide (in milligrams) required to saponify one gram of fat.

What is a Saponification?

Saponification is a chemical reaction that involves the conversion of a fat or oil into soap and alcohol with the help of a strong alkali, typically lye or caustic soda. The process breaks down the ester bonds in the fat or oil, resulting in the formation of glycerol and fatty acid salts, which are the basic components of soap. This reaction is used in soap-making industries and is also a common laboratory technique in organic chemistry.

How to Calculate Saponification?

The following steps outline how to calculate the Saponification Value (SV).

  1. First, determine the weight of the sample (W) in grams.
  2. Next, determine the volume of the solution used (V) in milliliters.
  3. Next, gather the formula from above = SV = (56.1 * W) / V.
  4. Finally, calculate the Saponification Value (SV).
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Weight of the sample (W) = 20 g

Volume of the solution used (V) = 10 ml