Calculate Voltage (V), Current (I), or Resistance (R) using Ohm’s Law. Leave one field empty to solve for it automatically.
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About Ohm’s Law

Ohm’s Law relates Voltage, Current, and Resistance in an electrical circuit: V = I × R.

How It Works

Enter any two values. Leave the value you want to calculate empty. The calculator automatically solves for the missing value using the formula V = I × R.

Practical Advice

Use this calculator for circuit design, electrical experiments, or learning purposes. Always double-check results in real circuits to ensure safety.

FAQs

Can I calculate all three at once? No, you must leave the unknown value empty.
Is it precise? It’s accurate mathematically; real-world factors may vary.
Does it work with AC/DC? Yes, but this only calculates basic Ohm’s Law for resistive circuits.