Electricity Cost Calculator
Calculate how much it costs to run any appliance. See daily, monthly, and yearly costs based on your electricity rate.
Calculate Electricity Costs
See how much it costs to run any appliance
Heating
Cooling
Kitchen
Entertainment
Computing
Other
Check appliance label or manual
Check your electricity bill
Monthly Cost
$18.00
120 kWh per month
Per Hour
$0.150
while running
Per Day
$0.60
4 kWh
Per Month
$18.00
120 kWh
Per Year
$216
1440 kWh
Energy Usage Comparison
How to Use This Calculator
Use the quick select buttons to choose a common appliance, which will auto-fill the wattage and typical usage hours. Or enter values manually.
Enter the power consumption in watts. This is usually printed on a label on the appliance or in the user manual. It might be listed as "W" or "Watts".
Set your electricity rate (cost per kWh). You can find this on your electricity bill. The calculator starts with an average rate for your region.
Adjust the hours per day and days per month sliders to match your actual usage patterns.
Understanding Your Results
The monthly cost is what this appliance adds to your electric bill at your current usage rate. The yearly cost helps you see the long-term impact.
kWh (kilowatt-hours) is how electricity is measured. Your bill shows total kWh used. One kWh = 1,000 watts running for one hour.
The per-hour cost shows what you spend each hour the appliance runs. Multiply this by hours of use for any custom calculation.
The CO2 estimate uses an average of 0.4 kg CO2 per kWh - actual emissions vary by your region's power sources (coal, gas, nuclear, renewables).
Frequently Asked Questions
How do I find my appliance's wattage?
Check the label on the appliance (usually on the back or bottom), look in the user manual, or search online for '[appliance model] wattage'. The wattage is listed in watts (W). If only amps are listed, multiply amps × volts (usually 120V in US) to get watts.
How much does it cost to run a space heater?
A typical 1,500W space heater running 8 hours a day at $0.15/kWh costs about $1.80 per day, $54 per month, or $648 per year. Space heaters are one of the most expensive appliances to run - consider a programmable thermostat or zone heating instead.
What uses the most electricity in a home?
The biggest energy consumers are typically: heating/cooling (40-50% of bill), water heater (14-18%), washer/dryer (5-8%), lighting (5-10%), and refrigerator (4-5%). Exact percentages vary by climate, home size, and appliance efficiency.
How can I reduce my electricity bill?
Top tips: Switch to LED bulbs, use a programmable thermostat, unplug devices when not in use, run dishwasher/washer with full loads, use cold water for laundry, seal air leaks, and upgrade to Energy Star appliances when replacing old ones.
What's a kilowatt-hour (kWh)?
A kilowatt-hour is a unit of energy equal to using 1,000 watts for one hour. For example, a 100W light bulb running for 10 hours uses 1 kWh. Your electricity bill shows total kWh used and the rate you pay per kWh.
How do I find my electricity rate?
Check your electricity bill - it shows the rate per kWh (often listed as 'price to compare' or in the charges breakdown). Average US residential rates are about $0.15/kWh, but range from $0.10 in some states to $0.30+ in others.
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