Transmission ↔ OD ↔ dB calculator
Convert between transmission %, optical density and dB attenuation.
Category: Unit Converters
Formula: OD = -log₁₀(T) · dB = 10·OD
Inputs
| Input | Parameter | Unit | Default |
|---|---|---|---|
| Transmission | T | % | 50 |
Result with the default inputs
- Transmission: 50 %
- Optical density: 0.301 OD
- Attenuation: 3.0103 dB
- Absorbance: 0.301
Open it with your own values: put each input in the address as a parameter, for example /calculators/transmission-od-db?T=50. A unit other than the listed one goes in <parameter>_unit.
Read more: Wikipedia: Absorbance