Calculating rough cost is simple because Australia’s average cost per kWh is 25c. Therefore to calculate the annual cost divide the energy consumption figure by 4. For example, if the Energy Rating Label on a washing machine says it uses 400 kWh, it means it will roughly cost $100 per year for average use to run. For more accurate calculations the energy rating calculator can be used at http://www.energyrating.gov.au/calculator.