Electricity Cost Calculator
Calculate what an appliance costs to run per day, month, and year.
Cost per month
$18.60
Per day
$0.61
Per year
$223
Energy per day
3.6 kWh
Watts to dollars
Cost = watts ÷ 1000 × hours × rate per kWh. A 1,200 W space heater running 3 hours daily at 17¢/kWh costs about 61¢ a day — $18 a month. Heat-producing appliances (heaters, dryers, ovens) dominate most bills; electronics are usually noise.
Finding the real numbers
Nameplate watts are maximums — a fridge cycles, a laptop idles low. A $15 plug-in meter reads true consumption, and your utility bill states your actual rate (U.S. average ≈ 17¢/kWh in 2025, but 30¢+ in California and New England, where efficiency pays double).
Frequently asked questions
- How does the Electricity Cost Calculator work?
- Calculate what an appliance costs to run per day, month, and year.
- Is the Electricity Cost Calculator free to use?
- Yes. The Electricity Cost Calculator is completely free, runs entirely in your browser, and requires no account or sign-up. Your inputs never leave your device.
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