Ohm's Law Calculator

Ohm's Law Triangle
V I R V = 12 V I = 2 A R = 6 Ω

Ohm's Law Calculator

What is Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage, current, and resistance in an electrical circuit. It states that the current through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them.

The Formula

The formula for Ohm's Law is:

\[V = I \times R\]

Where:

  • V is voltage in volts (V)
  • I is current in amperes (A)
  • R is resistance in ohms (Ω)

Ohm's Law Triangle

The Ohm's Law triangle is a visual aid that helps remember the relationship between voltage, current, and resistance:

V I R

To use the triangle:

  • Cover the quantity you want to calculate
  • The remaining visible letters show you the calculation to perform
  • For example, covering 'V' leaves 'I × R', which is the formula for calculating voltage