Use our Electrical Power Calculator to quickly determine power in watts (W). Simply enter the voltage (V) and current (A) values to get instant results. Perfect for electricians, engineers, and DIY enthusiasts needing to calculate power (P) in electrical circuits using the fundamental formula P = V × I.
Formula:
The fundamental formula for calculating electrical power (P) in a DC circuit, or apparent power in an AC circuit with a purely resistive load, is:
P = V × I
- P = Power (measured in Watts, W)
- V = Voltage (measured in Volts, V)
- I = Current (measured in Amperes, A)
This formula, derived from Ohm's Law, defines the rate at which electrical energy is transferred by an electrical circuit. Understanding electrical power calculation is crucial for circuit design, safety, and energy efficiency.