Enter the total current moving through the resistor and the total resistance into the calculator to determine the power dissipation.

Power Dissipation Formula

The following formula is used to calculate the total power dissipated by a resistor.

p = i2 * R
  • Where p is the dissipated power (W)
  • I is the current moving through the resistor (amps)
  • R is the total resistance (ohms)

To calculate power dissipation, square the current, then multiply by the resistance.

Power Dissipation Definition

Power dissipation is a measure of the total reduction in power that occurs because of a system’s resistance to flow.

Power Dissipation Example

How to calculate power dissipation?

  • 1.First, determine the resistance. Measure the total equivalent resistance of the resistor or circuit.
  • 2.Next, determine the current. Measure the current flow through the circuit or resistor.
  • 3.Finally, calculated the dissipated power. Using the resistance and current, along with the formula, calculate the total dissipated power.


What is power dissipation?

Power dissipation is the total reduction in power that occurs due to a resistance to the flow of electricity. In most cases, this resistance comes in the form of a resistor. Add question