Ohms Law Calculator

This calculator uses Ohms law in it’s simple form for Direct Current. For Alternating Current, additional values must be added for an accurate calculation, such as an efficiency value, impedance value, and power factor. See “Ohm’s Law” for more information.

Enter any two known values and press "Calculate" to solve for the others.
Fields should be reset before each new calculation.

Volts
(E)
Resistance
(R)
Current
(I)
Power
(P)

(in watts)
                          

Enter any two known values and press "Calculate" to solve for the others.
Fields should be reset before each new calculation.

Volts
(E)
Resistance
(R)
Current
(I)
Power
(P)

(in watts)
                          


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