How is electric power calculated using voltage and current?

Electric power is calculated as the product of voltage and current.

Mathematically:
P = V × I

where:
P = electric power (watts)
V = voltage (volts)
I = current (amperes)

This formula indicates how much electrical energy is consumed or converted per unit time in a circuit.

For example, if a device operates at 220 V and draws 2 A current:
P = 220 × 2 = 440 watts

This relation is widely used in electrical appliances, circuit design, and energy consumption analysis.