Calculate the cost of running any electrical appliance. Find out how much electricity costs per day, month, and year based on wattage and usage.
Monthly Cost
$2.88
24.0 kWh
Yearly Cost
$34.56
288 kWh
Quick select common appliances:
US average: $0.12-0.15/kWh. Check your electric bill for your actual rate.
Daily
$0.10
0.80 kWh
Monthly
$2.88
24.0 kWh
Yearly
$34.56
288 kWh
Daily Energy Usage:
(100 W × 8 hours) ÷ 1000 = 0.800 kWh
Monthly Energy Usage:
0.800 kWh × 30 days = 24.00 kWh
Monthly Cost:
24.00 kWh × $0.12/kWh = $2.88
| Appliance | Watts | $/Month (8h/day) |
|---|---|---|
| LED Light Bulb | 10 W | $0.29 |
| Incandescent Bulb | 60 W | $1.73 |
| Laptop | 50 W | $1.44 |
| Desktop Computer | 200 W | $5.76 |
| Gaming PC | 500 W | $14.40 |
| TV (LED 55") | 80 W | $2.30 |
| Refrigerator | 150 W | $4.32 |
| Washing Machine | 500 W | $14.40 |
| Clothes Dryer | 3000 W | $86.40 |
| Dishwasher | 1800 W | $51.84 |
| Microwave | 1000 W | $28.80 |
| Air Conditioner (Window) | 1200 W | $34.56 |
| Central AC | 3500 W | $100.80 |
| Space Heater | 1500 W | $43.20 |
| Hair Dryer | 1500 W | $43.20 |
| Electric Oven | 2500 W | $72.00 |
| Ceiling Fan | 75 W | $2.16 |
| Phone Charger | 5 W | $0.14 |
| Electric Kettle | 1500 W | $43.20 |
| Coffee Maker | 900 W | $25.92 |
CO₂ Emissions (Monthly)
10.1 kg
Based on US average grid
CO₂ Emissions (Yearly)
121 kg
≈ 0.12 metric tons
The average US electricity grid produces ~0.42 kg CO₂ per kWh. This varies significantly by region and energy mix. Renewable energy sources have near-zero operational emissions.
To calculate electricity cost: multiply watts by hours used, divide by 1000 for kWh, multiply by rate per kWh. Formula: (Watts x Hours / 1000) x Rate = Cost. A 100W bulb running 8 hours at 0.12/kWh: (100 x 8 / 1000) x 0.12 = 0.096 per day = 2.88 per month. Average US electricity rate is $0.12-0.15 per kWh.
Electricity cost = (Watts × Hours used ÷ 1000) × Cost per kWh. First convert watts to kilowatts by dividing by 1000, multiply by hours of use, then multiply by your electricity rate. A 1000W device used for 5 hours at $0.12/kWh costs $0.60.
A kilowatt-hour (kWh) is a unit of energy equal to 1,000 watts used for one hour. It's how electric companies measure and bill electricity. A 100W bulb running for 10 hours uses 1 kWh. Most US homes use 800-1000 kWh per month.
US average is about $0.12-0.15 per kWh, but varies widely by state ($0.08 in Louisiana to $0.30+ in Hawaii). Check your electric bill for your actual rate. Some areas have tiered pricing or time-of-use rates that change throughout the day.
Heating and cooling typically account for 40-50% of home energy use. Other major consumers: water heater (14%), washer/dryer (13%), lighting (9%), refrigerator (4%). Old appliances and inefficient usage significantly increase costs.
Switch to LED bulbs (save 75%). Use smart power strips (eliminate standby power). Set thermostat 2-3°F higher/lower. Wash clothes in cold water. Air dry dishes. Use appliances during off-peak hours if time-of-use pricing. Upgrade old appliances to Energy Star.
Monthly Cost
$2.88
24.0 kWh
Yearly Cost
$34.56
288 kWh