ABSORBANCE – TRANSMITTANCE CONVERTER
A = 2 - log10 %T
A spectrophotometer measures light transmittance through a material and from that absorbance can be inferred. Transmittance and absorbance have a logarithmic relationship. For example, a material transmitting 0.0001% would have an absorbance (optical density) of 6. Use the tool below to easily convert between absorbance and transmittance.
|
Absorbance (optical density) |
Light Transmittance % |
|
0 |
100% |
|
1 |
10 |
|
2 |
1 |
|
3 |
0.1 |
|
4 |
0.01 |
|
5 |
0.001 |
|
6 |
0.0001 |
