Ohm's Law Calculator
Enter any 2 of Voltage, Current, Resistance, or Power and solve for the other 2 — the full P/V/I/R power wheel.
Enter any 2 of the 4 values below, leave the rest blank, then select Calculate.
Result
—
Formula
V = I × R, and P = V × I. Any two of the four values determine the other two.
Worked Example
A 12V circuit drawing 2A has 6Ω of resistance and consumes 24W.