basic

Beer-Lambert Absorbance & Concentration Calculator

A = ε · l · c — spectrophotometric absorbance.

Calculates absorbance, molar absorptivity, path length, or concentration using the Beer-Lambert law. Converts absorbance to transmittance.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
Was this helpful?

How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

A = ε × l × c; T = 10^(−A)

In depth

Calculates absorbance, molar absorptivity, path length, or concentration using the Beer-Lambert law. Converts absorbance to transmittance.