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Free Online Ohms Law Calculator

Calculate current and power from positive resistance and voltage. Units are volts, ohms, amperes and watts.

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Result



How to use Ohms Law Calculator
Calculate current and power from positive resistance and voltage. Units are volts, ohms, amperes and watts.
  1. Set Voltage.
  2. Set Resistance.
  3. Run the tool, review the result and its stated limitations, then copy or download if needed.
Example & practical use
Calculate current and power from positive resistance and voltage. Units are volts, ohms, amperes and watts. The example below demonstrates Voltage; Resistance.
Example input:
{
  "voltage": 12,
  "resistance": 6
}
Expected result (relevant fields):
{
  "current": 2,
  "power": 24
}
Features & result limitations
Calculate current and power from positive resistance and voltage. Units are volts, ohms, amperes and watts.
Frequently asked questions
What inputs does Ohms Law Calculator accept?
Voltage; Resistance
How should I interpret the Ohms Law Calculator result?
Calculate current and power from positive resistance and voltage. Units are volts, ohms, amperes and watts.
Where does Ohms Law Calculator process my data?
Inputs are processed locally in your browser. Submitted text is not sent to external services. A successful-run event increments an aggregate tool counter without your input.