Decibels to nepers
Type a value in dB to get it in Np instantly.
2.303Np
That's about the same as a hundred times. That is 100× the power, or 10× the voltage.
Convert the other way: Np to dB
What it means
How much is that?
These are plain ratio decibels. Decibels with a letter after them — dBm, dBW, dBµV — are levels against a fixed reference, which is a different page.
The math
How to convert dB to Np
To convert decibels to nepers, multiply by 0.115129.
Example: 20 dB × 0.115129 = 2.30259 Np.
In the other direction, 1 Np = 8.68589 dB.
Every unit
Your gain in every unit
Tables
dB to Np conversion table
| dB | Np |
|---|---|
| -20 dB | -2.30259 Np |
| -10 dB | -1.15129 Np |
| -6 dB | -0.690776 Np |
| -3 dB | -0.345388 Np |
| 0 dB | 0 Np |
| 3 dB | 0.345388 Np |
| 6 dB | 0.690776 Np |
| 10 dB | 1.15129 Np |
| 20 dB | 2.30259 Np |
| 30 dB | 3.45388 Np |
| 40 dB | 4.60517 Np |
| 60 dB | 6.90776 Np |
Np to dB conversion table
| Np | dB |
|---|---|
| -20 Np | -173.718 dB |
| -10 Np | -86.8589 dB |
| -6 Np | -52.1153 dB |
| -3 Np | -26.0577 dB |
| 0 Np | 0 dB |
| 3 Np | 26.0577 dB |
| 6 Np | 52.1153 dB |
| 10 Np | 86.8589 dB |
| 20 Np | 173.718 dB |
| 30 Np | 260.577 dB |
| 40 Np | 347.436 dB |
| 60 Np | 521.153 dB |
Quick answers
Quick answers
- How many Np is 1 dB?
- 1 dB is 0.115129 Np.
- How many Np is 10 dB?
- 10 dB is 1.15129 Np.
- How many Np is 20 dB?
- 20 dB is 2.30259 Np.
The units
About these units
Decibels (dB)
The standard logarithmic ratio: ten times the log of a power ratio.
Nepers (Np)
The natural-log version, used in theory. One neper is 8.686 dB.
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