Nepers to Decibels (Np to dB)
Free online neper to decibel converter. Type a value, get an instant exact result — plus the formula, a ready-made conversion table, and reverse conversion.
SOUND CONVERTER — INSTANT RESULT
Formula: multiply the neper value by 8.68596 — i.e. dB = Np × 8.68596
Quick check: 1 Np = 8.68596 dB
Quick check: 1 Np = 8.68596 dB
Nepers to Decibels conversion table
| Nepers (Np) | Decibels (dB) |
|---|---|
| 1 Np | 8.68596 dB |
| 2 Np | 17.37192 dB |
| 3 Np | 26.05788 dB |
| 4 Np | 34.74384 dB |
| 5 Np | 43.4298 dB |
| 6 Np | 52.11576 dB |
| 7 Np | 60.80172 dB |
| 8 Np | 69.48768 dB |
| 9 Np | 78.17364 dB |
| 10 Np | 86.8596 dB |
| 15 Np | 130.2894 dB |
| 20 Np | 173.7192 dB |
| 25 Np | 217.149 dB |
| 30 Np | 260.5788 dB |
| 40 Np | 347.4384 dB |
| 50 Np | 434.298 dB |
| 75 Np | 651.447 dB |
| 100 Np | 868.596 dB |
| 250 Np | 2,171.49 dB |
| 500 Np | 4,342.98 dB |
| 1,000 Np | 8,685.96 dB |
How to convert nepers to decibels
To convert nepers to decibels, multiply the amount in nepers by 8.68596. For example, 10 Np = 86.8596 dB. To convert in the other direction, divide by the same factor, or use the ⇄ swap button above.
Convert sound level units between bels, decibels and nepers. One bel equals 10 decibels; one neper equals about 8.686 dB.
Frequently asked questions
How many decibels are in one neper?
One neper is exactly 8.68596 decibels.
How do I convert Np to dB?
Multiply the Np value by 8.68596 to get dB. The converter at the top of this page does this automatically and works in both directions.
How much is 100 nepers in decibels?
100 nepers equals 868.596 decibels.