How to Compare Appliance Running Costs

Use the same electricity rate and the same amount of useful work when comparing two appliances.

Compare like with like

For laundry appliances, compare similar load sizes and programmes. For cooking appliances, compare the energy required to cook the same meal rather than simply comparing wattage.

Use energy rather than wattage alone

A higher-wattage appliance can still cost less for a task if it completes the job much faster. The important figure is total kWh consumed.

Account for frequency

A small cost per use can become significant when repeated every day. Compare weekly or annual estimates when deciding where efficiency improvements matter most.

Annual cost = Cost per use × Uses per week × 52