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Neper to Decibel Converter
Use this page to convert neper values into decibel, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 Np = 8.68588963806504 dB
1 dB = 0.115129254649702 Np
Example: 8 Np = 69.4871171045203 dB
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Neper
A unit used to express ratios of quantities such as gain and loss in electronic and telecommunication signals.
History: Named after John Napier, the inventor of logarithms.
Current use: Scientific and engineering applications.
Also written as Np, nepers.
Decibel
The most common unit for expressing sound level.
History: The decibel grew from telephone and audio engineering as a practical tenth-of-a-bel scale.
Current use: Acoustics, electronics, control theory.
Also written as dB, decibels, db.
Neper to Decibel table
| Neper [Np] | Decibel [dB] |
|---|---|
| 0.01 Np | 0.0868588963806503 dB |
| 0.1 Np | 0.868588963806504 dB |
| 1 Np | 8.68588963806504 dB |
| 2 Np | 17.3717792761301 dB |
| 5 Np | 43.4294481903252 dB |
| 10 Np | 86.8588963806504 dB |
| 20 Np | 173.717792761301 dB |
| 50 Np | 434.294481903252 dB |
| 100 Np | 868.588963806503 dB |
Frequently asked questions
How many Decibel (dB) are in one Neper (Np)?
One Neper equals 8.68588963806504 Decibel.
How do you convert Neper to Decibel?
Multiply the Neper value by 8.68588963806504 to get the result in Decibel.
How do you convert Decibel back to Neper?
Multiply the Decibel value by 0.115129254649702 to get back to Neper.
What is 8 Neper in Decibel?
8 Neper equals 69.4871171045203 Decibel.