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How to Calculate Ohm's Law

Calculate voltage, current, or resistance using Ohm's Law.

The Formula

V = I × R

The ohm's law formula uses the mathematical relationship: V = I × R. Each variable in the formula represents a measurable quantity that affects the final result.

Step-by-Step Method

  1. 1Identify all input values needed for the ohm's law calculation.
  2. 2Substitute your known values into the formula: V = I × R.
  3. 3Perform the arithmetic operations in the correct order (PEMDAS/BODMAS).
  4. 4Check that your result has the correct units and is within a reasonable range.
  5. 5Verify using the interactive Ohm's Law Calculator to confirm your answer.

Related Topics

ohms lawvoltagecurrentresistancephysics

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