Decibels per 100 feet to decibels per kilometer
Type a value in dB/100 ft to get it in dB/km instantly.
6.562dB/km
That's 19× as lossy as single-mode fiber at 1310 nm, while thick coaxial cable is 4.6× lossier. After about 1.524 km only a tenth of the power is left.
Convert the other way: dB/km to dB/100 ft
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/100 ft to dB/km
To convert decibels per 100 feet to decibels per kilometer, multiply by 32.8084.
Example: 0.2 dB/100 ft × 32.8084 = 6.56168 dB/km.
In the other direction, 1 dB/km = 0.03048 dB/100 ft.
Every unit
Your attenuation in every unit
Tables
dB/100 ft to dB/km conversion table
| dB/100 ft | dB/km |
|---|---|
| 0.1 dB/100 ft | 3.28084 dB/km |
| 0.2 dB/100 ft | 6.56168 dB/km |
| 0.5 dB/100 ft | 16.4042 dB/km |
| 1 dB/100 ft | 32.8084 dB/km |
| 5 dB/100 ft | 164.042 dB/km |
| 10 dB/100 ft | 328.084 dB/km |
| 25 dB/100 ft | 820.21 dB/km |
| 50 dB/100 ft | 1,640.42 dB/km |
| 100 dB/100 ft | 3,280.84 dB/km |
| 200 dB/100 ft | 6,561.68 dB/km |
| 500 dB/100 ft | 16,404.2 dB/km |
dB/km to dB/100 ft conversion table
| dB/km | dB/100 ft |
|---|---|
| 0.1 dB/km | 0.003048 dB/100 ft |
| 0.2 dB/km | 0.006096 dB/100 ft |
| 0.5 dB/km | 0.01524 dB/100 ft |
| 1 dB/km | 0.03048 dB/100 ft |
| 5 dB/km | 0.1524 dB/100 ft |
| 10 dB/km | 0.3048 dB/100 ft |
| 25 dB/km | 0.762 dB/100 ft |
| 50 dB/km | 1.524 dB/100 ft |
| 100 dB/km | 3.048 dB/100 ft |
| 200 dB/km | 6.096 dB/100 ft |
| 500 dB/km | 15.24 dB/100 ft |
Quick answers
Quick answers
- How many dB/km is 1 dB/100 ft?
- 1 dB/100 ft is 32.8084 dB/km.
- How many dB/km is 10 dB/100 ft?
- 10 dB/100 ft is 328.084 dB/km.
- How many dB/km is 0.2 dB/100 ft?
- 0.2 dB/100 ft is 6.56168 dB/km.
The units
About these units
Decibels per 100 feet (dB/100 ft)
The US cable datasheet standard.
Decibels per kilometer (dB/km)
The standard for optical fiber.
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