Enter the absorbance and molar concentration into the calculator to determine the molar extinction coefficient.

## Extinction Coefficient Formula

The following equation can be used to calculate a molar extinction coefficient.

E = A / mc

- Where E is the extinction coefficient
- A is the absorbance
- mc is the molar concentration

## FAQ

**What is an extinction coefficient?**

An extinction coefficient is a measure of a chemicals ability to absorb light at a given wavelength.

**What is absorbance?**

Similarly, absorbance is also another measure of the substances ability to absorb light.

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