Electricity Cost Calculator
Calculate the daily, monthly, and yearly cost of running any appliance. Shows kWh used, dollars spent, and CO2 emissions at US average rates.
Appliance usage
Yearly cost
$46.72
About $3.90 per month and $0.1280 per day.
Daily use
0.800 kWh
Monthly use
24.35 kWh
Yearly use
292.00 kWh
CO2 per year
108.3 kg
CO2 estimate uses the EPA eGRID U.S. average of 0.371 kg CO2 per kWh.
Frequently Asked Questions about the Electricity Cost Calculator
What is the average US electricity rate?
The US residential average is about $0.16 per kWh (2024 EIA data), but rates vary widely. Hawaii pays over $0.40 per kWh; Washington and Idaho stay near $0.11. Check your utility bill for your exact rate.
What is vampire load (phantom power)?
Electricity devices draw while plugged in but off or in standby. Game consoles, cable boxes, chargers, and smart speakers can pull 1-20 watts continuously. DOE estimates standby power costs $100-200 per year per household.
What is the difference between watts and amps?
Watts measure power (energy used right now). Amps measure current. They are linked by voltage: watts = volts times amps. Most US outlets are 120V, so a 1,200W microwave pulls 10 amps. Your bill is in kWh.
What does kWh actually mean?
A kilowatt-hour is the energy used by a 1,000-watt device running for one hour. Run a 100W bulb for 10 hours and you have used 1 kWh. A 1,500W space heater for one hour equals 1.5 kWh. Utilities bill by the kWh.
Where does the CO2 number come from?
Uses the EPA eGRID US national average of about 0.371 kg CO2 per kWh. Your actual emissions depend on your grid mix. Coal-heavy states (WV, WY) are far higher; hydro/nuclear regions (VT, WA) are much lower.