Electricity Cost Calculator
US average: ~16 cents/kWh (2024)
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Common appliances
How to Calculate Electricity Cost
Electricity is measured in kilowatt-hours (kWh). One kWh = 1,000 watts running for one hour. To calculate cost:
Example: A 1,500W space heater run 8 hours/day for 30 days at $0.16/kWh costs 1.5 x 8 x 30 x 0.16 = $57.60/month.
Average Electricity Rates by State (2024)
Check your utility bill for your exact rate. Enter it above for a precise estimate.
Frequently Asked Questions
What uses the most electricity in a home?
HVAC (heating and cooling) typically accounts for 40-50% of a home's electricity bill, followed by water heating (~18%), appliances (~15%), lighting (~10%), and electronics (~10%). Your air conditioner and electric water heater are the biggest targets for energy savings.
How do I find the wattage of an appliance?
Check the label on the back or bottom of the device — it typically shows watts (W) or amps (A) and volts (V). If shown in amps: Watts = Amps x Volts (typically 120V in the US). Wattage can also be found in the product manual or the manufacturer's website.
How much does running an EV add to my electric bill?
A typical EV gets about 3-4 miles per kWh. At 16 cents/kWh and 1,000 miles/month of driving, that's roughly 300 kWh x $0.16 = $48/month in additional electricity. Most EV owners charge at night on off-peak rates, reducing the cost further.