Enter the molar absorption coefficient, concentration, and path length into the calculator to determine the total absorbance.

## Beer-Lambert Law Formula

The following equation is used to calculate the absorbance of a substance.

A = ma * c * l

- Where A is the absorbance
- ma is the molar absorption coefficient (m*2/mol)
- c is the concentration (mol/L)
- l is the path length (m)

## Beer-Lambert Law Definition

The Beer-Lambert law defines the phenomena that absorbance of a substance is proportional to the product of the concentration and length.

## Beer-Lambert Law Example

How to calculate absorption from the Beer-Lambert law?

**First, determine the coefficient.**Calculate the molar absorption coefficient of the substance.

**Next, determine the concentration.**Calculate the concentration of the substance.

**Next, determine the path length.**Calculate the length of the path in which the substance can be absorbed.

**Finally, calculate the absorption.**Calculate the absorption using the formula above.

## FAQ

**What is the Beer Lambert Law?**

This law sates that the absorbance is proportional to the length and the concentration of a material.