Electrical Power Formula
Also known as: Power Formula, Wattage Formula
P = V \times I
P = V × IWhat It Calculates
Calculates the rate at which electrical energy is converted. Can also be expressed as P = I²R or P = V²/R using Ohm's law.
variables
| Symbol | Name | Description |
|---|---|---|
| P | Power | Rate of energy transfer |
| V | Voltage | Potential difference |
| I | Current | Electric current |
Worked Examples
1
P = 120 × 10 = 1,200 W = 1.2 kWResult: 1,200 W
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