Ohm's Law Calculator

Calculate the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit.

Calculation Tool

Enter any two values to calculate the third

Quick Guide

Ohm's Law Formulas:

  • Voltage (V)I × R
  • Current (I)V / R
  • Resistance (R)V / I

Standard Units:

V
Volts
A
Amperes
Ω
Ohms

Tips

  • Enter any two values to calculate the third automatically.
  • Use decimal points for precise fractional values (e.g., 0.5).
  • Results are accurately rounded to 2 decimal places.
  • Always verify your units before running calculations for precision.