If you run your dishwasher for one hour, it will only cost you a little over 12 cents. This means that if you use your dishwasher five times per week, the total cost to run it would be around $2.40 per month. However, keep in mind that these figures and dishwasher watts can vary based on the make and model of your dishwasher. In the following sections, we'll delve into the wattage of different dishwashers and how they compare.