Home Power Consumption Calculator
Calculate your home electricity usage and cost.
Add appliances with their wattage and daily hours to estimate monthly kWh and electric bill.
Power Consumption
Electricity cost is based on kilowatt-hours (kWh):
kWh = (Watts × Hours per day) / 1000
Monthly kWh = Daily kWh × 30
Monthly Cost = Monthly kWh × Rate per kWh
Common appliance wattages:
| Appliance | Typical Watts |
|---|---|
| LED Bulb | 10 |
| Laptop | 50 |
| Desktop Computer | 200 |
| Refrigerator | 150 |
| TV (55") | 80 |
| Washing Machine | 500 |
| Dryer | 3,000 |
| Central AC | 3,500 |
| Space Heater | 1,500 |
| Microwave | 1,000 |
| Hair Dryer | 1,800 |
| Dishwasher | 1,800 |
Average US electricity rate: $0.16/kWh (varies by state from $0.10–$0.35)
Tips to reduce consumption:
- Switch to LED bulbs (save ~80% vs incandescent)
- Use smart power strips to eliminate standby power
- Run dishwasher and laundry during off-peak hours
- Set AC to 78°F in summer, 68°F in winter