What you are changing
An EnergyGuide label combines a standardized annual-use assumption with an electricity-price assumption. Repricing changes the second number, not the first. Enter the label’s estimated yearly electricity use in kWh/year and a cents-per-kWh price you choose.
The annual formula is annual kWh × cents/kWh ÷ 100. Dividing by 100 converts cents to dollars. Monthly and weekly figures are averages calculated as annual cost divided by 12 and 52.
Compare the printed estimate carefully
If you enter the label’s printed yearly operating estimate, LabelWatts shows the difference between estimates. That difference explains what happens when the price assumption changes. It does not prove a change in appliance efficiency or household use.
When the printed estimate is greater than zero, the calculator also derives its implied price: printed yearly estimate × 100 ÷ annual kWh. A zero printed estimate can produce a dollar difference, but a percentage comparison is unavailable because zero cannot be the denominator.
Why your result can differ
The FTC explains that operating cost is an estimate based on typical use and a national average energy price. Your schedule, climate, settings, maintenance, and local electricity pricing can produce a different outcome. Use annual kWh from the label when it is the best standardized input you have, then treat every monetary result as an appliance-only estimate.
Independent calculator. Not affiliated with or endorsed by the FTC, DOE, EIA, EPA, ENERGY STAR program, appliance manufacturers, or utilities.