Energy Consumption Calculator

Understanding Energy Consumption

Understanding your energy consumption is the first step to reducing your electricity bill and environmental impact. Energy is measured in kilowatt-hours (kWh), where 1 kWh equals using 1,000 watts for 1 hour. This calculator helps you estimate daily, monthly, and yearly energy usage and costs for any appliance.

Energy Calculation Formula

The basic formula for calculating energy consumption:

• Daily kWh: (Watts × Hours per Day) ÷ 1000
• Weekly kWh: Daily kWh × Days per Week
• Monthly kWh: Daily kWh × 30 days
• Yearly kWh: Daily kWh × 365 days
• Cost: kWh × Electricity Rate ($/kWh)

Common Appliance Wattage

Typical power consumption of common household appliances:

• LED Light Bulb: 9-12W
• Refrigerator: 100-400W (runs intermittently)
• Air Conditioner: 1000-3500W
• Washing Machine: 400-1400W
• Dryer: 1800-5000W
• TV (LED): 30-150W
• Computer: 150-300W
• Microwave: 600-1200W

Carbon Footprint

Electricity generation produces carbon emissions. The average US grid emits approximately:

• 0.4 kg CO2 per kWh: US average emissions factor
• Monthly impact: A typical home's monthly electricity use produces ~300 kg CO2
• Yearly impact: Equivalent to driving 7,000 miles in an average car
• Reduction: Energy-efficient appliances can reduce emissions by 20-50%

Using This Calculator

Follow these steps:

• Step 1: Select an appliance from the list or enter custom wattage
• Step 2: Enter the quantity of appliances
• Step 3: Enter hours used per day
• Step 4: Enter days used per week
• Step 5: Enter your electricity rate ($/kWh)
• Step 6: Click "Calculate" to see energy usage and costs
• Step 7: View daily, weekly, monthly, and yearly consumption
• Step 8: Check carbon footprint and cost breakdown