How many watts does a 4.50 amp refrigerator use?

Answer 1

Probably about 450 watts.

Since the primary use of power in a refrigerator is for a motor the watts it uses are less than the amps that pass through it.

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Assuming that the refrigerator uses 120 volts for a supply voltage, then W = A x V.

4.5 x 120 = 540 watts

Answer 2

A 4.50 amp refrigerator would use approximately 540 watts (4.50 amps x 120 volts).