How many Watts do my appliances use? Naturally, electrical usage will vary from model to model, so remember that the table below are just examples. Energy Consumed 5000 watts Electric oven (800 for a range burner) 5000 watts Clothes dryer (electric) 3800 watts Water heater (electric) 3500 watts Central Air Conditioner (2.5 tons) 1500 watts Microwave oven 1500 watts Toaster (four-slot) 900 watts Coffee maker 600-1440 watts Window unit air conditioner 200-700 watts Refrigerator 150 watts Desktop Computer & 15" CRT monitor 15-30 watts Desktop Computer & Monitor (in sleep mode) 120 watts 17" CRT monitor 40 watts 17" LCD monitor 75 watts Regular light bulb 55-90 watts 19" television 45 watts Laptop computer 6-25 watts Ceiling fan (36"-52"), on high speed 18 watts Compact fluorescent light bulb 4 watts Clock radio 3 watt-hours Total power stored by an alkaline AA battery. This is to put batteries into perspective. If you could power your clock radio with a AA battery, it wouldn't even last an hour.