What is the unit of absorbance in Beer-Lambert Law?

Absorbance (A) in the Beer-Lambert Law is a dimensionless quantity and does not have any units. It represents the logarithmic ratio of the intensity of incident light to the intensity of transmitted light and is often measured on a scale from 0 to 2, where absorbance of 1 indicates that 90% of the light has been absorbed. Absorbance is calculated from the intensity values and thus has no units.