Ohm's Law Calculator

Calculate voltage, current, resistance, and power using Ohm's Law. Enter any two values to find the others.

Ohm's Law Calculator

Calculate voltage, current, resistance, and power

Enter any two values:

Voltage

Current

Resistance

Power

Ohm's Law Formulas

V = I × R

I = V / R

R = V / I

P = V × I

P = I² × R

P = V² / R

Formula

V = I × R, P = V × I

Enter any two values to calculate the others