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Q:

# How many watts is 120 volts?

A:

Watts cannot be calculated using the number of volts alone. Amperage is required, too.

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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.

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## Related Questions

• A:

At 115 volts of current, 115 watts is equal to one amp, but the number of watts to equal an amp varies based on the current. If using a 12-volt battery to power the circuit, 12 watts is equal to one amp.

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• A:

Depending on composition, AA batteries put out 1.1 to 3.6 volts of electricity during a discharge and contain between 590 and 2,100 amp hours. The major types of AA battery are lithium ion, nickel-cadmium, NiMH, carbon-zinc and Alkaline long life.

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Using a multimeter, insert one of the probes from the multimeter into one of the parallel slots in the 240-volt outlet and insert the other probe into the other parallel slot to test if the outlet is indeed carrying 240 volts. If the voltage does not add up to 240 volts, check the slots individually to see which one is carrying less voltage.