Table Of Contents
Bel to neper Conversion
1 bel (B) is equal to 1.151292546 neper (Np).
1 B = 1.151292546 Np
or
1 Np = 0.8685889638 B
Formula
To convert a sound level from bel (B) to neper (Np), multiply the sound level in bel by 1.151292546
s(Np) = s(B) × 1.151292546
Examples:
Convert 100 bel to neper:
s(Np) = 100B × 1.151292546 = 115.1292546 Np
Conversion table
| 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 |
| 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 |
Frequently asked questions
How do I convert bel to neper?
Multiply the value in bel by 1.151292546 to get the result in neper. For example, 5 B × 1.151292546 = 5.756462732 Np.
How many neper are in 1 bel?
1 bel (B) is equal to 1.151292546 neper (Np).
How do I convert neper back to bel?
Use the inverse operation: divide the value in neper by 1.151292546 to get the result in bel.
How accurate is the bel to neper 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:
