# Power Calculator- Ohm's Law

Enter any 2 values for the 3rd value to be computed. Only 2 fields can be entered in for 3rd field to be computed.

This power calculator calculates the power of a circuit, based either on the circuit's current and resistance, voltage and resistance, or voltage and current.

The power formula can be represented in 3 different ways to calculate either the power the circuit.

**P=VI** is the the power formula used to calculate the power of a circuit based on the voltage, V, and current, I, of the circuit. The product of voltage and current
yields the circuit's power.

**P=I ^{2}R** is the power formula used to calculate the power of a circuit based on the current, I, and the resistance, R, of the circuit.

**P=V ^{2}/R** is the power formula used to calculate the power of a circuit based on the voltage, V, and the resistance, R, of the circuit.

To use this calculator, the user just has to enter 2 of the 3 fields. For example, if the user wants to calculate the power of a linear circuit based on the voltage and current, he just enters in the voltage, V, and current, I, and clicks 'Calculate'.

The unit of the power calculated is in unit watts (W).

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