Electrical Power Calculator
Calculate electrical power from voltage and current.
About this calculator
The Electrical Power Calculator on NumberCals is a free, mobile-friendly tool for anyone needing to calculate electrical power from voltage and current. Enter your values in the form below and the result is computed instantly — no sign-up, no installation, no waiting.
Formula used
P = V × I
What you'll need
- Voltage (V) (e.g. 230)
- Current (A) (e.g. 5)
What you'll get
- Power (W)
- Power (kW)
Formula
P = V × I
Result
Frequently Asked Questions
What about AC power factor? +
For AC circuits, real power = V·I·cos(φ). This calculator gives apparent power; for real power, multiply by your power factor.
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