可持续发展
Appliance Energy Cost Calculator
Calculate daily, monthly, and yearly electricity consumption and cost for home appliances
使用方法
The **Appliance Energy Cost Calculator** estimates the electrical consumption and cost of running household items.
Kilowatt-Hour (kWh): The unit energy companies bill you for. 1 kWh is equivalent to running a 1,000 Watt appliance for 1 hour.
Formula: (Watts × Hours / Day) ÷ 1,000 = Daily kWh.
常见问题
How is appliance electricity cost calculated?
Multiply the appliance power in watts by the daily hours used, divide by 1000 to get kilowatt-hours (kWh), and multiply by your local utility rate ($/kWh).
What is vampire power / standby draw?
Standby power is the energy consumed by appliances when they are turned off but still plugged in. Devices like chargers, TVs, and microwaves draw small amounts of power continuously.
How can I reduce my home appliance electricity cost?
Use energy-efficient LED light bulbs, unplug idle electronics, run washing machines and dishwashers only with full loads, and select ENERGY STAR certified products.
How to Use the Appliance Energy Calculator
Estimate the electricity cost of running any appliance over a day, month, or year.
- Enter the appliance wattage.
- Enter hours used per day.
- Enter your electricity rate per kWh.
- See daily, monthly, and yearly cost.
Energy Cost Formula
Daily kWh
Convert watt-hours to kilowatt-hours.
Example:
Input: 1500W for 3h
Calculation: 1500 × 3 / 1000
Result: 4.5 kWh/day
Cost
Multiply energy used by your tariff.
Example:
Input: 4.5 kWh at $0.15
Calculation: 4.5 × 0.15
Result: $0.68/day
Real-World Use Cases
Bill Reduction
Find which appliances cost the most to run.
Upgrade Decisions
Compare an old vs energy-efficient model.
Tips
Tips
- Standby power adds up — unplug idle devices.
- Check the appliance label for wattage; heating/cooling uses the most.