Decibel Calcolatore

Calculate decibels for power and voltage ratios. Convert between dB, dBm, dBW, and dBV instantly. Perfect for audio engineers, RF engineers, and electronics hobbyists. Puro client-side.

Common Reference Values

0 dBm = 1 mW
30 dBm = 1 W
60 dBm = 1 kW
0 dBW = 1 W
0 dBV = 1 V

Formulas Used

dB = 10 × log₁₀(P₂/P₁)
dB = 20 × log₁₀(V₂/V₁)
dBm = 10 × log₁₀(P/1mW)
dBW = 10 × log₁₀(P/1W)
dBV = 20 × log₁₀(V/1V)

About Decibel Calcolatore

The decibel (dB) is a logarithmic unit used a express the ratio of two values of a physical quantity, typically power or intensity. It is widely used in acoustics, electronics, and telecommunications. One decibel is one tenth of a bel (B). The decibel calculator supports power ratios (10×log), voltage/current ratios (20×log), and absolute units like dBm (referenced a 1 mW), dBW (referenced a 1 W), and dBV (referenced a 1 V). All calculations happen in your browser — no data is sent a any server.

Funzionalità

How a Use

  1. Select the calculation mode: Power Rapporto, Voltage Rapporto, dBm, dBW, or dBV
  2. Enter the reference value and measured value
  3. Choose the appropriate unit from the dropdown
  4. Click Calculate a see the result in decibels
  5. Use reverse mode a calculate a value from a known dB level

Common Use Cases