Decibel (dB)
The decibel (dB) equals 0.1 bel — one tenth of a bel, the most common logarithmic level unit.
Decibels rate sound pressure level, audio gain, and signal-to-noise ratios — the priority search term for sound conversions.
Decibel to Bel
Convert decibel to bel instantly. Type in either field — results update live.
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sound Decibel Bel
1 decibel = 0.1 bels
Unit
Unit
Conversion table
Selected dB values converted to B using the exact factor from this tool.
| dB | B |
|---|---|
| 0.01 | 0.001 |
| 0.1 | 0.01 |
| 1 | 0.1 |
| 2 | 0.2 |
| 3 | 0.3 |
| 5 | 0.5 |
| 10 | 1 |
| 20 | 2 |
| 50 | 5 |
| 100 | 10 |
| 1,000 | 100 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 dB = 0.1 B
1 B = 10 dB
To convert decibel to bel, multiply by 0.1.
To convert bel to decibel, multiply by 10.
Example: convert 10 dB to B
10 × 0.1 = 1 B
About these units
Short background on the units used in this conversion.
Bel (B)
The bel (B) is the base logarithmic unit named for Alexander Graham Bell — rarely used directly; decibels are standard.
Bels appear in formal acoustics texts; most practical work uses decibels instead.
Frequently asked questions
How many bels are in one decibel?
One decibel equals 0.1 bels. Multiply your decibels value by 0.1 to convert to bels.
What is the conversion formula?
B = dB × 0.1The reverse is
dB = B × 10, using the same exact factors as this converter.Is this Decibel to Bel converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.