Convert between dBm, Watts, Peak Volts, and RMS Volts. Enter your input value and unit. Adjust the load resistance if needed. Your input will be converted to several units.
| Power | Voltage | Current |
|---|---|---|
| - | - | - |
| - | - | - |
This calculator converts between voltage, power, and current representations that are common in RF and other analog systems. For instance, it can convert between an RF power expressed in dBm to its equivalent voltage and current across a 50 ohm load resistance. Similarly, it can compute the voltage across an 8 ohm speaker driven at a specified power level.
Enter your input value in the Input field. Select the corresponding unit from the menu to the right of the input. The following input units are available:
Adjust the system Load resistance from its 50 ohm default if desired. This value is needed for converting power to voltage and vice versa.
Your input value will be converted to several power, voltage, and current units. The results will appear in the table below once the inputs are filled in.
Let's suppose you're working on an RF amplifier that can supply up to 17 dBm into a 50 ohm load. You want to determine the maximum expected voltage across the load resistor.
To do so, enter 17 into the Input field and select dBm as the unit. Set the Load Resistance field to 50 ohms. The results will appear immediately in the table below the input fields. The voltage across the load is given in two units: 1.5830 volts, RMS and 2.2387 volts, peak.
