Energy Consumption & Cost Calculator
Estimate electricity costs for household appliances. Database of wattages, CO2 emission calculation, and multi-device comparison table.
Add Appliance
Your Appliances
| Item | Daily Cost | Monthly Cost | CO2/Mo | Action |
|---|
About
With rising energy prices, understanding the "phantom load" of your household appliances is the first step toward reducing your monthly bill. A gaming PC running 6 hours a day or an old refrigerator with a failing seal can silently add hundreds of dollars to your annual expenses. However, most device labels show Volts and Amps, not the direct cost per hour.
This calculator bridges that gap by converting raw wattage into currency. It includes a comprehensive database of standard appliances - from LED bulbs to HVAC systems - allowing you to stack multiple devices to simulate a full room or house. It also estimates the environmental impact in kilograms of CO2, helping eco-conscious users visualize their carbon footprint.
Formulas
The formula to calculate the cost C is based on the kilowatt-hour (kWh) usage:
For Carbon Dioxide emissions (kg), we use a global average emission factor (approx 0.4 kg/kWh):
Reference Data
| Appliance | Avg Wattage (W) | Cost/Hour (@ $0.15/kWh) | Est. Annual Cost (Avg Usage) |
|---|---|---|---|
| Central Air Conditioner | 3500 | $0.52 | $400+ |
| Water Heater (Electric) | 4500 | $0.67 | $500+ |
| Refrigerator | 150 - 400 | $0.03 | $150 |
| Gaming PC (High End) | 600 | $0.09 | $130 |
| LED Light Bulb | 10 | $0.001 | $3 |
| Space Heater | 1500 | $0.22 | High (seasonal) |
| Washing Machine | 500 - 1000 | $0.11 | $30 |
| Microwave | 1200 | $0.18 | $15 |