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Electricity Cost Calculator
US average: $0.12/kWh (check your utility bill)
Monthly Cost (30 days)
$2.88
Daily
$0.10
Weekly
$0.67
Yearly
$35.04
kWh/Day
0.8
kWh/Month
24
Typical Wattages
LED bulb10W
Laptop50W
Desktop PC200W
Refrigerator150W
Window AC1000W
Space heater1500W
Hair dryer1800W
Electric oven2500W
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How to Use the Electricity Calculator
- Enter appliance wattage (check the label)
- Enter hours of daily use
- Enter your electricity rate from your bill
- View daily, monthly, and yearly costs
Energy Saving Tips
- LED bulbs - Use 75% less energy than incandescent
- Smart power strips - Eliminate standby power
- Energy Star - Choose efficient appliances
- Programmable thermostat - Reduce HVAC costs
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Frequently Asked Questions
How do I calculate electricity cost?
Cost = (Watts × Hours × Days) ÷ 1000 × Rate. A 100W bulb running 8 hours at $0.12/kWh costs about $2.88/month.
What is a kilowatt-hour (kWh)?
A kWh is 1,000 watts used for 1 hour. It's the standard unit for billing electricity.
How much does it cost to run an AC?
A typical window AC (1,000W) running 8 hours daily at $0.12/kWh costs about $28.80/month.
What uses the most electricity?
HVAC (heating/cooling), water heater, dryer, and refrigerator typically use the most energy in homes.