Question: how many watts does a dishwasher use per hour?
Answer: Dishwashers use between 1200 and 2400 watts of power, with an average dishwasher using 1800 watts. Click calculate to find the energy consumption of a dishwasher using 1800 Watts for 1 hour a day @ $0.10 per kWh. Dishwashers will typically use less water than hand washing if you are washing a full load of dishes.