Electrical Calculator
Enter any two values to calculate watts, volts, amps, and ohms.
Results
Voltage (V)
Current (A)
Resistance (Ω)
Try an example
Results are rounded to 8 significant digits. P means power; I means current.
Understand the units
Watts describe how quickly electrical energy is used.
Volts describe the electrical push that drives current.
Amps describe the flow of electric charge.
Ohms describe how much a component resists current.
For DC circuits and purely resistive loads. AC motors and other reactive loads require additional information, such as power factor.