Home Electricity Consumption Calculator
Calculate your home energy usage and electricity costs accurately
Electricity Consumption Calculator
Based on Real Appliance Power Ratings
Energy Consumption & Cost:
Daily Consumption: 0.00 kWh
Monthly Consumption: 0.00 kWh
Yearly Consumption: 0.00 kWh
Daily Cost: $0.00
Monthly Cost: $0.00
Yearly Cost: $0.00
How to Use the Calculator
Step 1: Select Appliance
- Choose from common household appliances
- Power rating will auto-populate
- Select "Custom" for unlisted appliances
- Check appliance nameplate for exact wattage
Step 2: Enter Usage Details
- Input daily usage hours
- Specify number of appliances
- Enter your electricity rate
- Check your utility bill for rate
Step 3: Analyze Results
- Review daily, monthly, yearly consumption
- Check associated costs
- Read energy saving tips
- Compare different appliances
Energy Consumption Fundamentals
Power vs Energy
Understanding the difference:
- Power (Watts): Rate of energy consumption
- Energy (kWh): Total power used over time
- 1 kWh = 1000 watts used for 1 hour
Cost Calculation
- Energy cost = kWh × Rate per kWh
- Rates vary by location and utility
- Time-of-use rates may apply
Key Formulas:
Energy (kWh) = Power (kW) × Time (hours)
Daily Cost = Daily kWh × Rate per kWh
Monthly Cost = Daily Cost × 30.44 days
Calculation Formulas
Daily Energy:
kWh = (Watts × Hours × Quantity) ÷ 1000
Monthly Energy:
Monthly kWh = Daily kWh × 30.44
Yearly Energy:
Yearly kWh = Daily kWh × 365.25
Cost Calculation:
Cost = kWh × Rate per kWh
Example Calculation
Refrigerator (150W, 24 hours/day):
Power: 150W
Daily Hours: 24
Daily kWh: (150 × 24) ÷ 1000 = 3.6 kWh
Monthly kWh: 3.6 × 30.44 = 109.6 kWh
Monthly Cost: 109.6 × $0.135 = $14.80
Typical Appliance Power Ratings
Kitchen Appliances
- Refrigerator: 100-200W
- Microwave: 700-1200W
- Dishwasher: 1800-2300W
- Electric Oven: 2000-3000W
HVAC Systems
- Central AC: 3000-5000W
- Window AC: 500-1500W
- Electric Heater: 1000-2000W
- Ceiling Fan: 50-100W
Laundry & Water
- Washing Machine: 400-1300W
- Clothes Dryer: 2000-4000W
- Water Heater: 3000-4500W
- Water Pump: 250-1100W
Electronics
- LED TV (55"): 60-150W
- Desktop PC: 200-500W
- Laptop: 30-70W
- LED Bulb: 8-15W