Sound (Bel, Decibel, Neper) Converter
Convert logarithmic level units — bels, decibels and nepers.
Result
8.685889638dB
1 Neper = 8.685889638 Decibel
1 Np in every unit
| Decibel | 8.685889638 dB |
| Bel | 0.8685889638 B |
| Neper | 1 Np |
| Millineper | 1,000 mNp |
Show the work
Find the conversion factor from Neper to Decibel
1 Np = 8.685889638 dB
factor = 8.685889638 ÷ 1 = 8.685889638 dB per Np
Multiply by the factor: Np cancels, leaving dB
dB = Np × (dB per Np)
1 Np × 8.685889638 dB per Np = 8.685889638 dB
How it works
1 Np = 8.685889638 dB, so dB = Np × 8.685889638
Uses 1 Np = 20·log₁₀(e) dB ≈ 8.6859 dB (field-quantity convention, IEC 60027-3).
Neper to Decibel table
| Neper | Decibel |
|---|---|
| 1 Np | 8.685889638 dB |
| 2 Np | 17.37177928 dB |
| 5 Np | 43.42944819 dB |
| 10 Np | 86.85889638 dB |
| 20 Np | 173.7177928 dB |
| 50 Np | 434.2944819 dB |
| 100 Np | 868.5889638 dB |
| 1,000 Np | 8,685.889638 dB |
Questions
- How do I convert neper to decibel?
- Multiply by 8.685889638. For example, 10 Np = 86.85889638 dB.
- Which units does the sound (bel, decibel, neper) converter support?
- Decibel (dB), Bel (B), Neper (Np), Millineper (mNp).
- Anything to watch out for?
- Uses 1 Np = 20·log₁₀(e) dB ≈ 8.6859 dB (field-quantity convention, IEC 60027-3).
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