EVERYDAY CLARITY
Audio Db Calculator
What decibel level difference corresponds to this power ratio? Enter the stated values to calculate this model.
Your result
Power-ratio level difference
dB
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Measured power (W) | Enter measured power in W; use the same basis as the other measurements. |
| Reference power (W) | Enter reference power in W; use the same basis as the other measurements. |
Understanding your result
Read Power-ratio level difference (dB) in the units and model stated on this page. The formula decibels=10*log10(power/reference) defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
What decibel level difference corresponds to this power ratio?
What decibel level difference corresponds to this power ratio? Enter the stated values to calculate this model.
Common uses
- What decibel level difference corresponds to this power ratio
How it works
decibels=10*log10(power/reference)
Worked example
Enter Measured power: 10 W; Reference power: 1 W. Results: Power-ratio level difference: 10 dB.