Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference across the two points, and inversely proportional to the resistance between them.

The below Ohm's Law calculator helps you find the Power with the given other two values. Calculate Power with Voltage and Current as per Ohm's Law of P = EI, with Current and Resistance as per the law P = I^{2}R, with Voltage and Resistance as per the law P = (E^{2} / R).

Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference across the two points, and inversely proportional to the resistance between them.

The below Ohm's Law calculator helps you find the Power with the given other two values. Calculate Power with Voltage and Current as per Ohm's Law of P = EI, with Current and Resistance as per the law P = I^{2}R, with Voltage and Resistance as per the law P = (E^{2} / R).

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The general formula for Power is:

P= ExI P= IUsing Ohm's law,

The power with voltage 5 Volt and 8 Amp current is

= 5 x 8

= 40 Watts

Power with 8 Amps of current and 3 ohms of resistance is

= 8^{2} x 3

= 192 Watts

Power with Voltage 5 Volts and 3 ohms of resistance is

= (5^{2})/ 3

= 8.333 Watts