Power & Unit Conversions
Vrms to dBm Calculator
Convert an RMS voltage across a known impedance to a power level in dBm.
Result
Enter the inputs above and select Calculate.
Formula: P(dBm) = 10 · log₁₀(Vrms² / Z₀) + 30
Power & Unit Conversions
Convert an RMS voltage across a known impedance to a power level in dBm.
Result
Enter the inputs above and select Calculate.
Formula: P(dBm) = 10 · log₁₀(Vrms² / Z₀) + 30