dBV (Voltage Level)

dBV = 20 × log10(V / 1V)

Calculator

Result
—

Formula

dBV = 20 × log10(V / 1V)

Description

dBV is an absolute voltage measurement referenced to 1 volt RMS. A voltage of 1V equals 0 dBV, 10V equals 20 dBV, and 100mV equals -20 dBV. This unit is common in professional audio, consumer electronics specifications, and signal level analysis. Unlike dBu, dBV is referenced to a fixed voltage regardless of impedance, making it straightforward for voltage measurements. Most consumer audio line-level signals are specified at approximately -10 dBV (316 mV RMS).

Variables

  • dBV — Voltage level referenced to 1V RMS (dB)
  • V — RMS voltage (V)

Practical Notes

Key conversions: 0 dBV = 1.000V, -10 dBV = 0.316V (consumer line level), +4 dBu ≈ +1.78 dBV = 1.228V (professional line level). The relationship between dBV and dBu is: dBV = dBu - 2.218. Both units assume sinusoidal signals; for other waveforms, use the RMS value.

Related Formulas

dB (Power) dB (Voltage) dBm to Watts dBu (Voltage Level) dBm to dBW Conversion Receiver Noise Floor

Need more features?

Save calculations, import telemetry data, simulate battery discharge, and collaborate with your team.

Try the App