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
Amperage or current (I) =		Amps
Resistivity or resistance (R) =		Ohms Ω
Wattage or power (P) =		Watts
Click on any box to clear its value, or

To use the above wheel, simply choose the quadrant corresponding to the variable you want to calculate, then select the segment corresponding to the variables that you know the values of.