Compare the same job, over the same period, at your own electricity rate.
Use the price you pay per kWh. Where to find it
No currency conversion. Include variable charges you want to model; fixed fees are separate.
No rate applied yet.
Use operating time, not just time plugged in. For a fridge, heater or variable-speed appliance, measured kWh or a suitable energy label is usually more useful.
Match the period printed on the label or recorded by your meter. An energy label describes test conditions.
Fractional cycles are fine: 2.5 per week means about five cycles every two weeks. Use the same programme as the energy figure.
Optional. Leave this off to compare electricity only.
Existing A has no new purchase cost. Its historic purchase price is a sunk cost.
All amounts use your selected currency. Includes electricity and the purchase amounts entered. Excludes water, maintenance, financing and other unentered costs.
Make the use comparable: the same cycles, useful output or representative measurement period. We don’t assume two appliances deliver the same service.
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