Electrical Power Formula (P = VI)
P = V·I
What it means
Electrical power is voltage times current — how fast a circuit uses energy.
Variables
| Symbol | Quantity | SI unit |
|---|---|---|
P | power | W |
V | voltage | V |
I | current | A |
Worked example
Given V = 120 V, I = 2 A, solve for P:
P = 240 W