Ohm's Law Calculator
Calculate V, I, R, and P
Calculate For
Enter any two values to calculate the third
V
A
Ω
W
Ohm's Law Formulas
V = I × R
Voltage = Current × Resistance
I = V / R
Current = Voltage / Resistance
R = V / I
Resistance = Voltage / Current
P = V × I
Power = Voltage × Current