Free · Everyday · Electrical

Ohm's Law Calculator

Calculate voltage, current, resistance, and power from any two selected electrical values.

  • Checked formula
  • Private in your browser
  • No signup
Calculator inputs

Enter your values

Result

Your calculation

Power
24 W
Voltage
12 V
Current
2 A
Resistance
6 Ω

How to use this calculator

  1. Enter the values and choose the units that match your situation.
  2. Calculate to see the primary answer and useful conversions.
  3. Review the assumptions before using the result for a project or decision.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.