How to estimate appliance electricity costs
Appliance electricity costs are shaped by three practical inputs: the device wattage, how long it runs, and the price charged for each kilowatt-hour. This calculator combines the managed device list with electricity-cost calculations so you can compare a group of appliances in one estimate.
How to use this calculator
Select every appliance you want to include, set its quantity and Hours/Day, and use the number of days it normally operates in a month. Choose the bill cycle, then use either one general rate or one or more rate tiers from your bill. The results show energy consumption plus daily, monthly, bill-cycle and annual cost estimates.
Practical checks before relying on the estimate
- Read the wattage label on the actual appliance when possible; a typical device value may differ from your model.
- Use realistic running time instead of assuming every selected appliance runs at full power for the entire day.
- Check whether your bill uses tiered rates, fixed charges, taxes or time-of-use pricing that this simple estimate does not model.
Compare scenarios to find useful savings
Run a baseline with your current habits, then test one change at a time: fewer hours, a smaller quantity, or a lower-wattage replacement. The monthly view helps identify which appliances deserve attention, while the annual view shows the value of a change that seems small each day.
Important considerations
The result is an estimate, not a utility bill or a measurement from a power meter. Refrigerators, heaters, air conditioners and other thermostatically controlled devices often cycle rather than draw their rated wattage continuously. For a more accurate comparison, record actual usage with a meter and use the tariff rules that apply to your address.