Ohm's Law Calculator

Click on the data you know:

E-Volts:
I-Ampere:
Ω ohms:
W-Watt:
Valid Figures>>>

What is an Ohm's Law Calculator?

An Ohm's Law Calculator is a tool used to determine the relationship between voltage (V), current (I), resistance (R), and power (P) in an electrical circuit. It is based on Ohm’s Law, which states:

V = I × R

It can also help with power calculations using:

P = V × I

Why Use an Ohm’s Law Calculator?

An Ohm’s Law Calculator helps:

  • Electrical engineers and students quickly solve circuit problems.
  • Hobbyists design circuits efficiently.
  • Technicians diagnose electrical issues.

Instead of manually calculating each value, the calculator simplifies the process by computing missing variables instantly.

How to Use an Ohm’s Law Calculator?

  1. Input any two known values (Voltage, Current, Resistance, or Power).
  2. The calculator will automatically compute the remaining values using Ohm’s Law formulas.
  3. Apply the results to analyze or design circuits.

When to Use an Ohm’s Law Calculator?

  • When troubleshooting electrical circuits.
  • While designing electronic projects.
  • In physics or engineering studies to verify calculations.
  • When checking if components (resistors, batteries, etc.) meet circuit requirements.