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

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## 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.

## FAQ

**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