Ohm's Law Calculator
Calculate voltage, current, resistance, and power
Enter any two values
V
Voltage
I
Current
R
Resistance
P
Power
Ohm's Law Formulas
V = I × R
Voltage
I = V / R
Current
R = V / I
Resistance
P = V × I
Power
P = I² × R
P = V² / R
R = V² / P