Decibels per kilometer to decibels per 100 meters
Type a value in dB/km to get it in dB/100 m instantly.
0.02dB/100 m
That's about the same as single-mode fiber at 1550 nm. After about 50 km only a tenth of the power is left.
Convert the other way: dB/100 m to dB/km
What it means
How lossy is that?
Cable loss rises with frequency, so a datasheet figure always belongs to a stated frequency. Fiber loss depends on the wavelength instead.
The math
How to convert dB/km to dB/100 m
To convert decibels per kilometer to decibels per 100 meters, multiply by 0.1.
Example: 0.2 dB/km × 0.1 = 0.02 dB/100 m.
In the other direction, 1 dB/100 m = 10 dB/km.
Every unit
Your attenuation in every unit
Tables
dB/km to dB/100 m conversion table
| dB/km | dB/100 m |
|---|---|
| 0.1 dB/km | 0.01 dB/100 m |
| 0.2 dB/km | 0.02 dB/100 m |
| 0.5 dB/km | 0.05 dB/100 m |
| 1 dB/km | 0.1 dB/100 m |
| 5 dB/km | 0.5 dB/100 m |
| 10 dB/km | 1 dB/100 m |
| 25 dB/km | 2.5 dB/100 m |
| 50 dB/km | 5 dB/100 m |
| 100 dB/km | 10 dB/100 m |
| 200 dB/km | 20 dB/100 m |
| 500 dB/km | 50 dB/100 m |
dB/100 m to dB/km conversion table
| dB/100 m | dB/km |
|---|---|
| 0.1 dB/100 m | 1 dB/km |
| 0.2 dB/100 m | 2 dB/km |
| 0.5 dB/100 m | 5 dB/km |
| 1 dB/100 m | 10 dB/km |
| 5 dB/100 m | 50 dB/km |
| 10 dB/100 m | 100 dB/km |
| 25 dB/100 m | 250 dB/km |
| 50 dB/100 m | 500 dB/km |
| 100 dB/100 m | 1,000 dB/km |
| 200 dB/100 m | 2,000 dB/km |
| 500 dB/100 m | 5,000 dB/km |
Quick answers
Quick answers
- How many dB/100 m is 1 dB/km?
- 1 dB/km is 0.1 dB/100 m.
- How many dB/100 m is 10 dB/km?
- 10 dB/km is 1 dB/100 m.
- How many dB/100 m is 0.2 dB/km?
- 0.2 dB/km is 0.02 dB/100 m.
The units
About these units
Decibels per kilometer (dB/km)
The standard for optical fiber.
Decibels per 100 meters (dB/100 m)
How network and coaxial cable is specified in Europe.
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