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`V = sqrt( "P" * "R" )`

Enter a value for all fields

The **Voltage** calculator computes the Voltage (V) based on Ohm's Law using Power (P) and Resistance (R).

**INSTRUCTIONS:** Choose units and enter the following:

- (
**P**) This is the electrical power. - (
**R**) This is the electrical resistance.

**Voltage (V):** The calculator returns the potential in volts. However, this can be automatically converted to other electric potential units via the pull-down menu.

For more information on the relationship between electrical power, current, resistance and potential, see the Ohm's Law Calculator. The Ohm's Law formula for voltage or potential based on power and resistance is:

` V = sqrt (P*R)`

where:

- V = voltage
- P = power
- R = resistance