Decibels to percent of power
Type a value in dB to get it in % instantly.
10,000%
That's about the same as a hundred times. That is 100× the power, or 10× the voltage.
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 %
Decibels are logarithmic, and power and amplitude use different multipliers: dB = 10 × log₁₀(power ratio) but dB = 20 × log₁₀(voltage ratio). Back the other way, the ratio is 10^(dB ÷ 10) or 10^(dB ÷ 20).
Example: 20 dB = 10,000 %.
Every unit
Your gain in every unit
Tables
dB to % conversion table
| dB | % |
|---|---|
| -20 dB | 1 % |
| -10 dB | 10 % |
| -6 dB | 25.1189 % |
| -3 dB | 50.1187 % |
| 0 dB | 100 % |
| 3 dB | 199.526 % |
| 6 dB | 398.107 % |
| 10 dB | 1,000 % |
| 20 dB | 10,000 % |
| 30 dB | 100,000 % |
| 40 dB | 1,000,000 % |
| 60 dB | 100,000,000 % |
% to dB conversion table
| % | dB |
|---|---|
| 1 % | -20 dB |
| 10 % | -10 dB |
| 25.1 % | -6.00326 dB |
| 50.1 % | -3.00162 dB |
| 100 % | 0 dB |
| 200 % | 3.0103 dB |
| 398 % | 5.99883 dB |
| 1,000 % | 10 dB |
| 10,000 % | 20 dB |
| 100,000 % | 30 dB |
| 1,000,000 % | 40 dB |
| 100,000,000 % | 60 dB |
Quick answers
Quick answers
- How many % is 1 dB?
- 1 dB is 125.893 %.
- How many % is 10 dB?
- 10 dB is 1,000 %.
- How many % is 20 dB?
- 20 dB is 10,000 %.
The units
About these units
Decibels (dB)
The standard logarithmic ratio: ten times the log of a power ratio.
Percent of power (%)
The power ratio as a percentage: −3 dB leaves about 50%.
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