Ohm's Law Calculator

Calculate voltage, current, resistance, and power using Ohm's Law

Ohm's Law Formulas

V = I × R

I = V ÷ R

R = V ÷ I

P = V × I

Where V = Voltage, I = Current, R = Resistance, P = Power

Input Values

Voltage (V)

Current (A)

Resistance (Ω)

Power (W)

Results

Voltage

0V

Current

0A

Resistance

0Ω

Power

0W

How to Use

Step 1: Input Known Values

Enter any two of the four values (voltage, current, resistance, or power).

Step 2: Calculate

Click the Calculate button to automatically compute the remaining values.