Absorbance Calculator

Absorbance is a dimensionless unit, which is also called as Decadic Absorbance. It is defined and expressed as the common logarithm of the ratio of incident to transmitted radiant power into a material. It is the measure of the capacity of a substance to observe the radiation. It is referred as optical density, as it is an induction of how much a material can stop the light. You can convert transmittance to absorbance using this online calculator.

Convert Transmittance to Absorbance

Code to add this calci to your website Expand embed code Minimize embed code


Absorbance = -Log10(T) Where, T = Transmittance of the Material


If the transmittance of a material is 23, calculate absorbance?


Absorbance = -Log10(T)
= - log10 (23)
= -1.3617

english Calculators and Converters