Calculate the electricity cost of running any appliance. Enter the wattage, daily usage hours, and your electricity rate to see daily, monthly, and yearly costs. Includes presets for common devices. This tool runs entirely in your browser.
Understanding your electricity costs helps you make smarter energy decisions and lower your utility bills. This calculator converts appliance wattage and usage hours into real cost estimates. A 100W light bulb running 8 hours daily at $0.15/kWh costs about $3.60/month. A 2000W space heater running 6 hours? $54/month. Knowing these numbers helps you prioritize energy-saving upgrades — replacing incandescent bulbs with LED (10W vs 60W), choosing efficient appliances, or simply turning things off. Common electricity rates range from $0.10-0.30/kWh depending on your country and provider. Check your utility bill for your exact rate.
Check the label on the appliance (usually back or bottom), the manual, or search the model number online. Common wattages: LED bulb 10W, laptop 50W, TV 100W, microwave 1000W, AC unit 1500-3000W.
1 kWh = using 1000 watts for 1 hour. It's the standard billing unit for electricity. A 100W bulb running for 10 hours uses 1 kWh. Your bill shows total kWh consumed and rate per kWh.
Varies widely: USA ~$0.16/kWh, UK ~$0.34/kWh, Germany ~$0.40/kWh, Switzerland ~$0.22/kWh, India ~$0.08/kWh. Check your utility bill for your exact rate.
Yes — 'standby power' or 'vampire draw' consumes 5-10% of household energy. TV, game console, phone charger, and microwave displays all draw power when plugged in. Use power strips to fully cut off.
A typical 2.5kW AC unit running 8 hours/day at $0.20/kWh costs about $4/day or $120/month. This is often the largest single electricity expense. Every degree higher you set reduces consumption ~3%.