Question 1

What is Ohm's Law?

Accepted Answer

Ohm's Law states that V = I x R, where V is voltage (volts), I is current (amps), and R is resistance (ohms).

Question 2

Which values do I need to enter?

Accepted Answer

Enter any two of the three values (voltage, current, resistance) and the calculator will compute the third.

Question 3

What units does it use?

Accepted Answer

Voltage in Volts (V), Current in Amperes (A), and Resistance in Ohms (ohm).

Question 4

Does it calculate power too?

Accepted Answer

Yes. Power (P = V x I) is also shown when voltage and current are known.

Question 5

Is this calculator free?

Accepted Answer

Yes, completely free. No signup required.

Ohm's Law Calculator

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