Decibel Calculator

Calculate decibel gain, loss, and conversions. Convert between power ratios, voltage ratios, and dB. Essential for audio, RF, and electronics.

How to Calculate Decibels

  1. 1 Select a calculation type (power ratio, voltage ratio, or dB conversion)
  2. 2 Enter your input values in the appropriate fields
  3. 3 View the calculated result in decibels or ratio form
  4. 4 Use the Add dB Values section to combine multiple dB values

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Last updated: January 15, 2026 · v2.1