Ohms Law Calculator
V = I × R.
Result
Voltage
12V
- Current
- 2A
- Resistance
- 6Ω
Common questions
What is Ohm's Law?
Ohm's Law states V = I × R, where V is voltage (volts), I is current (amps), and R is resistance (ohms). Enter any two values and the calculator solves for the third.
How do I calculate power using Ohm's Law?
Power (watts) = Voltage × Current, or P = V²/R, or P = I²×R. The calculator can derive power from any combination of voltage, current, and resistance.