Choose your appliance, confirm its wattage and how often you use it, then add your electricity rate and calculate. The result accounts for real-world duty cycles rather than assuming the appliance runs at full power the whole time, and shows an off-peak vs. peak comparison side by side whenever you enter a peak rate. Formula: Cost = (Watts × Running At% ÷ 1000) × Hours × Rate.
Your Appliance
Select a common appliance to auto-fill its typical wattage, or choose Custom to enter your own.
Wattage figures are typical published or measured values for each appliance type and can vary significantly by brand, model, age, and settings. Always verify against your appliance's nameplate, owner's manual, or a plug-in power meter for the most accurate result.
Wattage & Usage
Not sure what a field means? Tap the ⓘ next to its label.
Electricity Rate & CO2
Add a peak rate to see an off-peak vs. peak cost comparison.
Your Results
Bars show your total cost at each timeframe, at your rate. If you entered a peak rate, a second bar shows the same timeframe at your peak rate.
Results are for reference and estimation only. Actual cost varies with your appliance's real-world efficiency and duty cycle, your utility's rate structure, and your region's actual grid emissions. See full disclaimer below.
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