Beer-Lambert Law Calculator

The Beer-Lambert Law describes the attenuation of light as it passes through a solution with an absorbing species. Use this calculator to determine absorbance or concentration based on the Beer-Lambert equation: A = ε * c * l

Select Calculation Type

Calculate Absorbance

Calculate absorbance using concentration, path length, and extinction coefficient.

Concentration

Path Length

Extinction Coefficient (M⁻¹cm⁻¹)