dB Calculator
Calculate dBm and voltage levels
Rohde & Schwarz GmbH & Co. KG
Productivity
Calculate power levels in dBm and watt with addition and subtraction. Convert between dBm, dBW, mW, W, mV, V, dBV, dBµV, and dBu. Adjust for impedance. Perform voltage calculations for correlated and uncorrelated values.