Sound Level converter
Logarithmic ratio units.
Converter
Quick pairs
tap to loadOne decibel in every sound level unit
3 rows| Unit | Symbol | 1 dB equals |
|---|---|---|
| Bel | B | 0.1 |
| Neper | Np | 0.1151292546 |
| Decineper | dNp | 1.151292546 |
How the decibel to neper conversion works
One neper equals about 8.686 dB, and one bel is exactly 10 dB.
Multiply by 0.1151292546 to go from decibel to neper:
Np = dB × 0.1151292546
Going the other way, multiply by 8.685889638, which is the same as dividing by 0.1151292546.
Questions
How many neper are in one decibel?
One decibel equals 0.1151292546 neper.
Which units does this sound level converter cover?
4 units in total, all referenced to the decibel. They include decibel, bel, neper, decineper and more. Pick any pair from the two dropdown lists.
How precise are the results?
Every conversion is computed in your browser at double precision from the factors listed on this page, which follow the SI definitions and the exact international agreements for imperial and US customary units. Use the Decimals control to round the display without changing the underlying value.
Does anything I type leave my device?
No. The converter is plain JavaScript running locally, with no server round-trip, and the page keeps working offline once loaded.