Start with the kWh figure, then its unit.

Look beyond the rating letter or stars. Find the numerical energy consumption and the period or number of cycles it covers. Use that unit exactly when entering the calculator.

Two different examples

300 kWh per year goes into Known kWh → One year. 50 kWh per 100 cycles goes into Energy per cycle → 100 cycles. Don’t enter the latter as 50 kWh for each wash.

Per 100 cycles needs your own frequency.

EU washing machine labels show energy consumption per 100 cycles for the eco 40–60 programme. The programme and test conditions matter; a different programme can produce different use. European Commission: washing machines explains this label.

For example, 50 kWh per 100 cycles means 0.5 kWh per cycle. At four cycles per week that is 2 kWh per week, or about 104.29 kWh in a 365-day year. At an example rate of USD 0.25 per kWh, that is about USD 26.07 per year for electricity.

An annual estimate still rests on assumptions.

US EnergyGuide cost figures use standardized assumptions and an average energy price. Your actual use and local rate can differ. The FTC recommends considering both running costs and purchase price when comparing suitable appliances. See US Federal Trade Commission: EnergyGuide labels.

Use a yearly kWh figure as a label-based estimate. It is not a promise about your household. Temperature, load size, settings, programme selection and operating patterns can change real consumption.

Compare the same service.

Match capacity, programme and useful output as closely as practical. A smaller machine running more loads is not automatically a fair comparison with a larger one running fewer loads. The tool cannot decide whether the appliances meet the same need.

Know what the cost excludes.

These tools calculate electricity from your inputs. They do not add water, detergent, repairs, financing or disposal costs. If you include delivery or installation in a replacement comparison, the amount is shown explicitly.

Label rules differ by country and product. Check the relevant label guidance and manufacturer documentation for your appliance.