Electrical Engineering

Ohm's Law Calculator

Calculate voltage (V), current (I), resistance (R), and power (P) using Ohm's law. Enter any two known values to solve for all four.

Input (any 2)

Voltage (V)

Current (I)

Resistance (R)

Power (P)

Voltage

12.0000 V

Current

0.0000 A

Resistance

0.0000 Ω

Power

0.0000 W

V = I × R. P = V × I = I² × R = V²/R. Enter any two known values; the calculator solves for all four. Leave unknown fields blank.

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