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Power ratio to decibels calculator
Calculate relative power levels using dB = 10 log₁₀(P₂/P₁) and convert back to a power ratio.
This tool uses the power formula: dB = 10 log₁₀(P₂/P₁).
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The values are processed directly in your browser.
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Frequently asked questions
What is the formula for powers?
dB = 10 log₁₀(P₂/P₁).
What does 10 dB in power mean?
A power ratio of 10 to 1.
What does 3 dB approximately represent?
Approximately a power ratio of 2 to 1.
Is the formula for amplitude the same?
Not always. Amplitude ratios under equivalent conditions often use a factor of 20, but this tool specifically calculates power ratios.