Table Of Contents
Neper to bel Conversion
1 neper (Np) is equal to 0.8685889638 bel (B).
1 Np = 0.8685889638 B
or
1 B = 1.151292546 Np
Formula
To convert a sound level from neper (Np) to bel (B), divide the sound level in neper by 1.151292546
s(B) = s(Np) / 1.151292546
Examples:
Convert 250 neper to bel:
s(B) = 250Np / 1.151292546 = 217.147241 B
Conversion table
| Neper (Np) | Bel (B) |
|---|---|
| 1 Np | 0.868588964 B |
| 2 Np | 1.737177928 B |
| 3 Np | 2.605766891 B |
| 5 Np | 4.342944819 B |
| 10 Np | 8.685889638 B |
| 20 Np | 17.371779276 B |
| 25 Np | 21.714724095 B |
| 50 Np | 43.42944819 B |
| 100 Np | 86.858896381 B |
| 250 Np | 217.147240952 B |
| 500 Np | 434.294481903 B |
| 1000 Np | 868.588963807 B |
| Bel (B) | Neper (Np) |
|---|---|
| 1 B | 1.151292546 Np |
| 2 B | 2.302585093 Np |
| 3 B | 3.453877639 Np |
| 5 B | 5.756462732 Np |
| 10 B | 11.512925465 Np |
| 20 B | 23.02585093 Np |
| 25 B | 28.782313662 Np |
| 50 B | 57.564627325 Np |
| 100 B | 115.12925465 Np |
| 250 B | 287.823136624 Np |
| 500 B | 575.646273249 Np |
| 1000 B | 1151.292546497 Np |
Frequently asked questions
How do I convert neper to bel?
Divide the value in neper by 1.151292546 to get the result in bel. For example, 5 Np ÷ 1.151292546 = 4.342944819 B.
How many bel are in 1 neper?
1 neper (Np) is equal to 0.868588964 bel (B).
How do I convert bel back to neper?
Use the inverse operation: multiply the value in bel by 1.151292546 to get the result in neper.
How accurate is the neper to bel conversion?
The converter multiplies by the conversion factor 1.151292546 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
Sources
Conversion factors are based on internationally recognised standards:
