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Electrical / Circuit fundamentals
Ohm’s Law Calculator
Enter any two known circuit values to calculate voltage, current, resistance and power.
Known values
Input values
Results
Ohm's lawV = I × R
Power is voltage multiplied by current.
- Voltage
- 12 V
- Current
- 2 A
- Resistance
- 6 Ω
- Power
- 24 W
Results assume a simple resistive DC circuit. Reactive AC loads, changing resistance, temperature effects and component tolerances can produce different real-world values.