Electric Bill Calculator — From Appliance Usage
Daily Cost
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Monthly Cost
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Monthly Usage (kWh)
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How to Calculate Your Electric Bill
Your electric bill is determined by multiplying the total kilowatt-hours (kWh) consumed by your rate per kWh. To find kWh for any appliance: multiply watts by hours used per day, divide by 1000, then multiply by 30 for monthly usage.
The largest electricity consumers in most homes are heating/cooling (40-50%), water heating (15-20%), appliances (15-20%), and lighting (10-15%). Reducing AC usage by even 1-2 hours daily can save $20-40 per month.
The average US household uses about 900 kWh per month at an average rate of $0.13/kWh, resulting in a $117 monthly bill. Rates vary significantly by state, from $0.09 in Louisiana to $0.35+ in Hawaii.
Frequently Asked Questions
What uses the most electricity?
Air conditioning and heating are the biggest consumers (40-50% of the bill), followed by water heaters, dryers, and refrigerators. LED bulbs use 75% less energy than incandescent.
How can I reduce my electric bill?
Switch to LED lighting, use a programmable thermostat, seal air leaks, upgrade to Energy Star appliances, wash clothes in cold water, and unplug devices not in use.
What is a kilowatt-hour?
A kilowatt-hour (kWh) is 1,000 watts used for one hour. A 100W bulb running for 10 hours uses 1 kWh. This is the standard billing unit for electricity.