uV to dBm Calculator

Formula

The formula to calculate dBm from uV is:

\[ \text{dBm} = 20 \log_{10} (\text{uV}) - 10 \log_{10} (\text{Z}) - 90 \]

Where:

\(\text{dBm}\) is the decibel-milliwatts
\(\text{uV}\) is the micro volts
\(\text{Z}\) is the impedance in ohms

What is dBm?

dBm, sometimes referred to as dBmw, is a unit of measure that describes the ratio of power in relation to one watt. It is commonly used in telecommunications and radio frequency applications to express power levels.

Example Calculation 1

Let's assume the following values:

Micro Volts (uV) = 1000
Impedance (Z) = 50 ohms

Using the formula:

\[ \text{dBm} = 20 \log_{10} (1000) - 10 \log_{10} (50) - 90 = -46.99 \]

The dBm value is -46.99.

Example Calculation 2

Let's assume the following values:

Micro Volts (uV) = 2000
Impedance (Z) = 75 ohms

Using the formula:

\[ \text{dBm} = 20 \log_{10} (2000) - 10 \log_{10} (75) - 90 = -42.73 \]

The dBm value is -42.73.