Ohm's Law calculator

Understand and apply Ohm's Law effortlessly with our Ohm's Law Calculator: the essential tool for determining the relationship between voltage (V), current (I), resistance (R), and power (P).

What is Ohm's Law?

Ohm's Law defines the relationship between voltage , current, and resistance in an electrical circuit: V = I × R It means that the voltage (V) across a resistor equals the current (I) flowing through it multiplied by its resistance (R). This principle is fundamental for analyzing and designing electronic circuits.

Power Calculation

The calculator also determines electrical power (P) using these related formulas:

  • P = V × I
  • P = I² × R
  • P = V² / R

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Ohm's Law calculator

(Leave two field empty to compute it's value.)

Volts.

(Ω).

Amps.

Watts.

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