Ohm's Law Calculator
Calculate voltage, current, resistance, and power relationships in electrical circuits using Ohm's Law.
Circuit Parameters
Enter known values and select what to calculate
Results
Calculated circuit parameters
Enter at least two values and click "Calculate" to see results
Ohm's Law Wheel
P
Power
V
Voltage
I
Current
R
Resistance
P
Power
V = I × R
P = V × I
I = V ÷ R
R = V ÷ I