Electricity Calculator
Calculate watts, amps, volts, and ohms using Ohm's Law and the power equation. Includes energy cost calculator.
Ohm's Law & Power Calculator
Enter any two values to calculate the rest
Energy Cost Calculator
About Electricity Calculator
This free online electricity calculator lets you calculate watts, amps, volts, and ohms using ohm's law and the power equation. includes energy cost calculator — directly in your browser with no signup or installation required.
Features: Instant results, works entirely client-side (your data never leaves your browser), mobile-friendly, and completely free to use.