Ohm’s Law Calculator (Voltage, Current, Resistance & Power)
Use this Ohm’s law calculator to quickly find Voltage (V), Current (I), Resistance (R), and Power (P). Enter any two values and the tool will compute the rest.
Ohm’s Law Calculator
Enter any two values below to calculate the rest. Units can be adjusted (V, mV, kV etc.).
Results
Voltage
—
Current
—
Resistance
—
Power
—
Safety note: This calculator is for educational estimates. For mains electricity, follow local safety rules and consult a professional when unsure.
