Ohm's Law Calculator

Solve voltage, current, resistance, or power from two known electrical values.

Power

36 W

P = V × I

Voltage12 V

Current3 A

Resistance4 Ω

Power36 W

Enter two known electrical quantities and leave the unknown field at 0.

About the Ohm's Law Calculator

Solve voltage, current, resistance, or power from two known electrical values.

It runs entirely in your browser — nothing you type is sent to a server — and the result updates as you edit the inputs. Estimates are for educational and informational purposes only; see ourdisclaimer.

Common searches

voltage
current
resistance
electricity

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