Ohm’s Law states that Voltage (V) = Current (I) × Resistance (R). It's a fundamental formula in electrical engineering.

How do I use this calculator?

Just enter any two values out of Voltage, Current, Resistance, or Power, and the calculator will compute the remaining two.

What are the units used?

Voltage is in Volts (V), Current in Amperes (A), Resistance in Ohms (Ω), and Power in Watts (W).

Ohm’s Law is a fundamental principle in electronics that states: Voltage (V) = Current (I) × Resistance (R).

Enter any two known values among Voltage, Current, Resistance, or Power. The calculator will instantly compute the other values.

The tool uses Volts (V) for voltage, Amperes (A) for current, Ohms (Ω) for resistance, and Watts (W) for power.

Yes, Ohm’s Law applies to both AC and DC circuits, but this calculator assumes purely resistive loads for simplicity.

Absolutely. This Ohm’s Law Calculator is free and doesn’t require registration or payment.