Calculate electrical power in a circuit using any two of voltage, current, or resistance. Supports all three forms of the electric power equation.
Enter your values below
Voltage across the component.
Current flowing through the component.
Resistance of the component.
How this calculator works
Electrical power P is the rate of energy transfer. It can be calculated as voltage times current, current squared times resistance, or voltage squared divided by resistance.
Common questions about this calculator
These calculators are for educational and informational purposes only. While we strive for accuracy, results should be verified for critical applications. Always consult authoritative sources for engineering or scientific work.
