Electricity Cost Calculator
Calculate your electricity usage and estimate your energy bills
Or enter your own appliance wattage below
Check your appliance label for wattage
Quick rate selection:
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Estimated Monthly Cost
kWh per month
Daily
kWh
Monthly
kWh
Yearly
kWh
📊 Cost Breakdown by Appliance
💡 Energy Saving Tips
- • Switch to LED bulbs to reduce lighting costs by up to 75%
- • Unplug devices when not in use - standby power adds up!
- • Run appliances during off-peak hours for lower rates
- • Consider energy-efficient (Energy Star) appliances
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About Electricity Cost Calculator
The Electricity Cost Calculator helps you estimate how much it costs to run electrical appliances and devices. Understanding your electricity usage is essential for managing energy bills and making informed decisions about energy-efficient alternatives.
How Electricity Costs Are Calculated
Basic Formula
Energy (kWh) = Power (Watts) × Hours of Use ÷ 1000
Cost = Energy (kWh) × Rate ($/kWh)
Example Calculation
A 100W light bulb running for 10 hours:
- Energy = 100W × 10h ÷ 1000 = 1 kWh
- Cost at $0.12/kWh = 1 × $0.12 = $0.12
Understanding Your Electricity Bill
kWh (Kilowatt-Hours)
The standard unit for measuring electricity consumption. One kWh equals using 1,000 watts for one hour.
Electricity Rates
Rates vary significantly by:
- Location: Prices differ by state/country
- Time of use: Some utilities charge more during peak hours
- Usage tiers: Higher usage may mean higher rates
- Season: Rates may change in summer/winter
Average Electricity Rates by Region
| Region | Average Rate ($/kWh) |
|---|---|
| USA (Average) | $0.12 - $0.15 |
| California | $0.20 - $0.25 |
| Texas | $0.10 - $0.12 |
| Europe (Average) | $0.20 - $0.30 |
| UK | £0.25 - £0.35 |
| Australia | AUD $0.25 - $0.35 |
Common Appliance Power Consumption
| Appliance | Typical Wattage |
|---|---|
| LED Bulb | 8-12W |
| Laptop | 30-65W |
| Desktop Computer | 100-500W |
| Television (LED) | 30-100W |
| Refrigerator | 100-400W |
| Washing Machine | 300-500W |
| Air Conditioner | 900-3500W |
| Space Heater | 1000-1500W |
| Microwave | 600-1200W |
| Electric Oven | 2000-5000W |
Energy-Saving Tips
- Switch to LED Bulbs: Use 75% less energy than incandescent
- Unplug Standby Devices: Phantom loads add up
- Use Energy Star Appliances: Certified for efficiency
- Adjust Thermostat: Each degree saves 1-3% on heating/cooling
- Run Full Loads: Wait for full dishwasher/washer loads
- Use Power Strips: Easily cut power to multiple devices
Peak vs Off-Peak Rates
Many utilities offer time-of-use pricing:
- Peak Hours: Usually 2 PM - 7 PM weekdays (higher rates)
- Off-Peak: Nights and weekends (lower rates)
- Super Off-Peak: Late night hours (lowest rates)
Running high-consumption appliances during off-peak hours can significantly reduce your bill.
Note: Electricity rates and consumption vary based on location, utility provider, and appliance efficiency. Use your actual electricity rate from your bill for the most accurate calculations.
Understanding Your Electricity Usage
🔌 Phantom Loads
Devices on standby can use 5-10% of your electricity bill
❄️ Heating & Cooling
HVAC typically accounts for 40-50% of home energy use
💡 Lighting
LED bulbs use 75% less energy than incandescent
⭐ Energy Star
Certified appliances can save 10-50% on energy costs