Worked example
An absorbance of 0.5, coefficient of 10,000 L·mol⁻¹·cm⁻¹, and 1 cm path length give 0.00005 M (50 µM).
Assumptions and limitations
Use a coefficient for the same substance, wavelength, solvent, and conditions. Scattering, chemical changes, and detector nonlinearity can invalidate the estimate. This tool does not fit calibration curves or assess measurement uncertainty.
For educational and informational use. Not for patient care or safety-critical decisions. Check the relevant protocol and qualified guidance.
Reference and calculation checks
IUPAC Gold Book: Beer–Lambert law. The reference explains the underlying method; it does not endorse Toollinks.
Implementation checked October 19, 2026 using automated examples, unit conversion checks, and invalid-input checks. These checks do not certify a laboratory protocol. Read our calculation standards or report a reproducible issue to [email protected].