4 FOCUSED TOOLS
Absorbance & spectroscopy calculators
Relate concentration, path length, absorbance and transmittance.
Choose the right calculation
Use consistent absorption-coefficient and path-length units. The linear Beer–Lambert relationship assumes appropriate spectral and sample conditions. Stray light, scattering, reactions and high concentration can invalidate a simple interpretation.
Find a tool for your question
Beer Lambert Absorbance Calculator
Find ideal optical absorbance from concentration and optical path length.
Concentration From Absorbance Calculator
Recover concentration under a linear absorbance model.
Transmittance to Absorbance Calculator
Convert a transmitted-light percentage into base-ten absorbance.
Absorbance to Transmittance Calculator
Express absorbance as a transmitted fraction of incident light.
Is absorbance the same as percent absorption?
No. Absorbance is a logarithmic ratio of incident to transmitted light; percent transmission and absorption are different quantities.
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