Ohm's Law Calculator

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

Ohm's Law Calculator

V = I × R·P = V × I·P = I² × R

Solve for:

Voltage (V)

Current (A)

Power (W)

Resistance (Ω)

6 Ω

Voltage

12 V

Current

2 A

Resistance

6 Ω

Power

24 W

Example Scenarios

Ohm's Law

Ohm's Law states that voltage (V) equals current (I) multiplied by resistance (R). Combined with the power formula P=VI, knowing any two of the four electrical quantities lets you calculate the other two. This is fundamental to electronics design and circuit analysis.