Watts cannot be calculated using the number of volts alone. Amperage is required, too.
To find how many watts are in 120 volts, one need to know the formula that relates power (P) in watts to volts (V) and current (I) given in amps. The formula for this relationship is that power equals volts multiplied by amps, or P = V x I.
So, if the question is how many watts are in 120 volts that delivers a current of 2 amps, then the answer is 240 watts using the formula.
Watts, amps, volts and ohms are the units utilized to measure electricity.
120 watts has zero volts. The formula for volts when wattage is shown is E. = W/I. = Watts/Amperage. = Volts. As you can see if the amperage is not stated, the question can not be
http://wiki.answers.com/Q/How_many_volts_in_120wat...

There is absolutely no way to know with the details that were provided. You see, to figure out the volts in a watt we would also need to know how many amps there are. The formula
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120 volts equals 100
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I remember the formula as WAV (wave; hi there!  Watts = Amps x Volts. By dividing both sides of the formula by amps you get  Watts / Amps = Volts. the amps / amps on the right hand
http://answers.yahoo.com/question/index?qid=201007...
