Bel to neper
1 bel = 1.1512925465 neper. Enter your value for an instant conversion.
FormulaResult = value × 1.1512925465
This tool converts level units, not sound pressure to sound intensity. For an amplitude ratio, 1 neper = 20 / ln(10) decibels. A reference level is needed to recover a physical amplitude.
B to Np: the formula
For example, 10 bel = 11.512925465 neper.
Enter a decimal, a fraction such as 1/2, or scientific notation such as 1e3. Choose how many significant digits to display using the precision control.
Keep the same unit convention throughout your calculation. Regional and historical unit definitions can differ.
B to Np table
| bel | neper |
|---|---|
| 1 B | 1.1512925465 Np |
| 2 B | 2.30258509299 Np |
| 3 B | 3.45387763949 Np |
| 5 B | 5.75646273249 Np |
| 10 B | 11.512925465 Np |
| 20 B | 23.0258509299 Np |
| 50 B | 57.5646273249 Np |
| 100 B | 115.12925465 Np |
| 500 B | 575.646273249 Np |
| 1000 B | 1151.2925465 Np |