Saponification Value Calculator
Calculate the saponification value (SAP) of a fat or oil sample based on acid titration data.
Calculation Parameters
Adjust the values below.
Calculated Result
Saponification Value
Expert Tip
Ensure units are correctly formatted (e.g. Kelvin for gas temperatures and liters for volumes) to get chemically accurate outputs.
How this Calculator Works
This calculator allows you to solve Saponification Value problems dynamically. Adjust the input parameters using the sliders or selection menu below:
- Blank Titration Volume (mL) (Range: 1.0 to 100.0, Default: 25.0)
- Sample Titration Volume (mL) (Range: 0.0 to 100.0, Default: 15.0)
- Acid Molarity (mol/L) (Range: 0.01 to 2.00, Default: 0.50)
- Oil Sample Weight (g) (Range: 0.1 to 20.0, Default: 2.0)
The results are computed instantly and updated in the results panel on the right.
Formula & Methodology
Where:
- Blank Titration Volume: Parameter value.
- Sample Titration Volume: Parameter value.
- Acid Molarity: Parameter value.
- Oil Sample Weight: Parameter value.
Step-by-Step Calculation Example
To calculate Saponification Value manually, follow these steps:
- Identify the input parameters. For example:
- Blank Titration Volume (mL) = 25.0
- Sample Titration Volume (mL) = 15.0
- Acid Molarity (mol/L) = 0.50
- Oil Sample Weight (g) = 2.0
- Apply the formula:
SAP Value (mg KOH/g) = ((Blank Vol - Sample Vol) * Molarity * 56.1) / Weight
- Verify the calculated value which is updated instantly in the results panel on the right.
Frequently Asked Questions
What is a saponification value (SAP)? ▼
SAP value is the milligrams of potassium hydroxide (KOH) required to completely saponify 1 gram of fat or oil.
How do you convert KOH SAP value to NaOH for bar soap? ▼
Divide the KOH SAP value by 1.403 (the molar mass ratio of KOH to NaOH).
Why do shorter fatty acid chains have higher SAP values? ▼
Shorter chain fatty acids have lower molecular weights, providing more ester bonds per gram for lye to react with.