SpectralBench
A = εlc — solve for any variable
The Beer-Lambert law (A = εlc) is foundational to quantitative spectroscopy, linking the absorbance of a sample to its concentration, path length, and molar absorptivity. Whether you're determining an unknown concentration from a measured absorbance or planning an experiment around a target optical density, this calculator gives you the answer instantly.
Enter any three of the four variables and SpectralBench solves for the fourth. The built-in graph visualizes how absorbance changes with concentration, making it easy to identify the linear range and spot potential deviations at high optical densities.