Modern dishwashers are energy efficient and do not use a lot of water. Dishwashers use between 1200 and 2400 watts of power, with an average dishwasher using 1800 watts.
See the energy consumption of a dishwasher using 1800 Watts for 1 hour a day @ £0.19 per kWh.
Cost Per Hour: £0.3420
Cost Per Day: £0.3420
Cost Per Month: £10.40
Cost Per Year: £124.84
kWh Per Day: 1.80
Tip:Dishwashers will typically use less water than hand washing if you are washing a full load of dishes. Always fully load your dishwasher, it will use the same amount of energy and water as washing less. Avoid the heat drying cycle in a dishwasher, instead leave your dishes to air dry it will help conserve energy. If only washing a very small amount of dishes, consider a quick hand wash.