Electrical Power Calculator
Power-focused solver with convenient unit prefixes.
Solve focus
Power unit
Fill any two of V, I, R, P (or pick a solve focus to clear that field). Uses Ohm's law and power identities.
Voltage
12 V
Current
2 A
Resistance
6 Ω
Power
24 W
What is this tool?
Electrical power ties voltage, current, and resistance together through P = V·I, P = I²R, and P = V²/R. This calculator emphasizes power results with mW / W / kW display options.
How to use it
- Enter at least two known values among V, I, R, and P.
- Choose the power unit prefix that matches your scale.
- Confirm continuous and peak ratings on real components.
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