How many watts in 15 amperes?

Answer 1

There are no 'watts' in '15 amperes'. The watt is used to measure power, whereas the ampere is used to measure current. These are two completely different quantities, so you cannot convert one to another.

Answer 2

Watts = Volts x Amps x Power Factor

For a resistive load PF = 1 and gets less for non resistive loads. Therefore, if we have 120 V x 15 Amps we get 1800 Watts. Now as a rule of thumb we try only to load the circuit at about 80% capacity so we have 1440 watts.

Answer 3

It depends on the voltage. I = P / E where I = amps, P = watts, E = voltage.

Examples:

12 volts (such as in a car):

I = 15/12

I = 1.25 amps

120 volts (like a small lamp in a US home):

I = 15/120

I = 0.125 amps

Answer 4

Power (watts) = volts x amps

120 volts x 15 amps =1800 watts

Answer 5

To calculate the watts, you need to know the voltage as well. The formula to calculate watts is: Watts = Amperes x Volts. If the voltage is 120V, then 15A x 120V = 1800 watts.

Answer 6

At what voltage? P equals I times E, Where p=power in watts, I=current in amps and E= voltage in volts.

Answer 7

A 15 amp circuit has zero watts. The formula you are looking for is W = I x E. Watts = Amps x Volts.