A home refrigerator annually uses about 657 kilowatt hours, a home dishwasher uses approximately 241 kilowatt hours per year when used two hours per day and a microwave oven uses about 1095 kilowatts yearly when used two hours a day. These figures were calculated using the Energy.gov online calculator.
The U.S. Department of Energy offers an online Appliance Energy Calculator, as of November 2015, but it warns that the figures provided are only estimates. Click on My Appliance, select the state in which the appliance is used, enter the number of hours per day the appliance is used and input the number of days per year the appliance is used. The free online calculator automatically calculates the appliance's annual energy use and cost per year.