Electricity Cost Calculator
Estimate electricity costs for any appliance or device
Energy consumption
Estimated cost
Calculations are theoretical. Consult a licensed electrician for installations and always follow local electrical codes.
How to use
Select an appliance from the preset list or enter a custom wattage. Set the number of hours you use the device each day and your electricity rate per kWh (check your utility bill for the exact rate). The calculator instantly shows your daily, monthly, and yearly energy consumption in kilowatt-hours (kWh) and the estimated cost in your local currency.
Formula
Examples
Running an air conditioner
A 1,500W window AC unit running 8 hours per day at $0.15/kWh uses 12 kWh daily. That costs $1.80/day, $54/month, or $657/year. Upgrading to an energy-efficient model rated at 900W would cut costs to $32.40/month, saving over $250 annually.
LED vs incandescent bulb savings
An old 60W incandescent bulb running 6 hours daily at $0.12/kWh costs $15.77/year. A 10W LED producing the same light costs just $2.63/year. Switching 10 bulbs saves about $131 per year.
Gaming PC electricity cost
A gaming desktop drawing 400W during play for 4 hours daily at $0.13/kWh uses 1.6 kWh per day. That adds up to $6.24/month or $75.92/year. Putting the PC to sleep instead of leaving it idle can cut standby power significantly.
Frequently asked questions
How do I find my electricity rate?
Check your most recent electricity bill. Look for a line showing the rate per kWh (kilowatt-hour). In the US, the average residential rate is around $0.12-0.16/kWh, but it varies by state and provider. Some utilities charge tiered rates that increase with higher usage.
What is 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 charges you per kWh consumed.
Do appliances use electricity when turned off?
Many devices draw standby (phantom) power even when off. TVs, game consoles, chargers, and devices with clocks or remote controls typically use 1-10W in standby. While small individually, phantom loads across all devices can add 5-10% to your electricity bill.
How can I reduce my electricity costs?
Switch to LED bulbs, unplug devices not in use, use smart power strips, run high-wattage appliances during off-peak hours if your utility offers time-of-use rates, and choose Energy Star rated appliances. A programmable thermostat can reduce heating and cooling costs by 10-15%.
About this tool
Calculate how much it costs to run any appliance. Enter wattage and usage hours to see daily, monthly, and yearly electricity costs and energy consumption.
All calculations are performed locally in your browser. Your data never leaves your device.