Voltage, Current, Resistance & Wattage Calculator

Enter any two of the following values and click the calculation button.
The missing values will be calculated. Enter only two values.

 
Voltage or volt E or V volts V
Amperage or current I = amperes, amps A 
 Resistivity or resistance R =  ohms Ω
Wattage or power P = watts W
 
 
 

Ohm's Law