Energy Efficiency
Electrical Energy Consumption Calculator
⚡ kWh = kW × h
Calculate energy consumption, cost, and carbon footprint of electrical appliances.
Appliance Details
Appliance
Select an appliance or choose Custom for manual entry
Power Rating
W
Power consumption in watts (W)
Usage Time
h/day
Hours of use per day
Days per Month
days
Number of days the appliance is used per month
Cost & Environment
Electricity Rate
$
/kWh
Cost per kilowatt-hour (kWh)
CO₂ Emission Factor
kg/kWh
Carbon emissions per kWh (avg: 0.4 kg/kWh)
Energy
0kWh
Monthly Consumption
0 kWh
kWh per month
Daily Consumption
0 kWh
Monthly Cost
$0
Annual Cost
$0
CO₂ Emissions (Monthly)
0 kg
📊 Detailed Breakdown
| Parameter | Value | Unit |
|---|
How the formula works
Energy (kWh) = Power (kW) × Time (h) | Cost = Energy × Rate | CO₂ = Energy × Emission Factor
- Power (kW) = Power (W) ÷ 1000
- Daily Energy = Power (kW) × Hours per Day
- Monthly Energy = Daily Energy × Days per Month
- Monthly Cost = Monthly Energy (kWh) × Electricity Rate
- Annual Cost = Monthly Cost × 12
- CO₂ Emissions = Monthly Energy × CO₂ Factor
- Typical appliance powers: AC (1500W), Fridge (150W), Washer (500W), TV (100W), PC (300W)
- Electricity rate varies by region (US avg: $0.15/kWh)