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Beer Lambert Law Calculator
This is a calculator to find a missing Beer Lambert Law equation value. The formula sets absorbance equal to extinction coefficient (molar absorptivity) in M-1 cm-1 multiplied by path length and concentration. This calculator can be used to find the amount light absorbed by the medium it is passing through.
| Extinction Coefficient | M-1 cm-1 | ||
| x | Path Length | cm | |
| x | Concentration | M | |
| = | Absorbance |
For a database of common extinction coefficients, click here!
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Have a question or a feature request about this tool? Feel free to reach out to us and let us know! We're always looking for ways to improve!
References
This online resource may be cited as follows
MLA | "Quest Calculate™ Beer Lambert Law Calculator." AAT Bioquest, Inc., 20 Sep. 2025, https://www.aatbio.com/tools/quick-calculator/beer-lambert-formula-calculator. | |
APA | AAT Bioquest, Inc. (2025, September 20). Quest Calculate™ Beer Lambert Law Calculator. AAT Bioquest. https://www.aatbio.com/tools/quick-calculator/beer-lambert-formula-calculator. | |
| BibTeX | EndNote | RefMan |
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