电压比

以 dB 的形式确定从一个电压到另一个的电压比，输入下面的值，然后按下“计算”键。

  • 伏特
  • 伏特
  • dB

A change in voltage, from V1 to V2 can be expressed as a ratio in decibels with the equation RV = 20*log(V2 / V1). A doubling in the voltage level translates to a power ratio of 6 dB. Similarly, halving the power equals a -6 dB voltage ratio. This calculator can also be used to express differences between two distances or pressures.

  • dB = 20 log (V2/V1)

FAQs

The voltage ratio calculator converts voltage ratios into decibel (dB) values.

They help analyze gain, attenuation, and signal distribution.

Yes. It is commonly used for line‑level signal paths.

Yes. Impedance affects how voltage relates to power in real systems.