Ohm's Law Calculator
Calculate voltage, current, resistance, and power using Ohm's Law.
Enter at least two known values to calculate the others.
About Ohm's Law
Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points. It is a fundamental principle in electrical engineering.
The relationship is defined by the formula V = I × R, where V is voltage, I is current, and R is resistance. Additionally, electric power (P) is related as P = V × I.
Fundamental Formulas
V = I × R
P = V × I
I = V / R
R = V / I