Attenuation Calculator

Your details

Voltage mode: dB = 20 log10(Vin / Vout). Power mode: dB = 10 log10(Pin / Pout). Cable mode: total loss from length, connectors and splices.
Signal voltage before the attenuating element.
V
Signal voltage after the attenuating element. Leave blank to back-calculate from a target dB.
V
Optional: enter a target dB loss to calculate the required output voltage.
dB
AttenuationModerate loss
6.02dB

Total signal loss in decibels (positive = signal weakened)

Signal ratio (Vout/Vin or Pout/Pin)0.5
Signal retained50%
6.02 dB
Minimal<3Moderate3-10High10-20Severe20+

Signal attenuated by 6.02 dB (50.0% of signal remains).

  • A loss of 6.02 dB means roughly 50.0% of the signal is lost. Check whether your receiver's sensitivity budget can absorb this.
  • 6 dB corresponds to a voltage ratio of exactly 2:1 (half the voltage).

Next stepYour attenuation is within a manageable range for most RF, audio, and fiber links.

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