Enter the total amount of absorbance into the calculator to determine the percentage transmittance.

## Absorbance to Transmittance Formula

The following formula is used to calculate the percent transmittance from absorbance.

%T = anti-log (2 – a)

- Where %T is the percent transmittance
- a is the absorbance

## Absorbance to Transmittance Definition

Converting an absorbance to transmittance involves taking the antilog of 2 minus the absorbance.

## Absorbance to Transmittance Example

How to convert absorbance to transmittance?

**First, determine the absorbance.**Calculate the absorbance of the surface of the material.

**Next, calculate the transmittance.**Calculate the percent transmittance using the formula above.

## FAQ

**What is transmittance?**

Transmittance is a measure of the effectiveness of the surface of the material in transmitting radiant energy.