電費計算器
依電器功率、使用時數與電價，計算每日、每月與每年的用電成本
Appliance Details
快速示例
Typical Appliance Wattages
Electricity Cost
Energy Usage
Yearly Cost of Common Appliances (at your rate)
| Appliance Details | Power (W) | Hours / day | Cost per Year |
|---|
計算過程
Cost Breakdown
如果……呢？
每一行都基於你目前的輸入重新計算，點擊一行即可套用該方案。
比較兩個方案
Enter appliance details to see its running cost
Fill in wattage, daily hours and your electricity rate above
Electricity Cost Calculator FAQ
How do I find an appliance's wattage?
Check the label on the back or bottom of the device, its power adapter, or the manual. If only amps and volts are listed: Watts = Amps × Volts. Our reference table lists typical values for common appliances.
Where do I find my electricity rate?
On your utility bill — look for the price per kWh (energy charge). The US average is around $0.15–0.20 per kWh; rates vary widely by state and plan.
Why is my real bill different?
Appliances with thermostats (fridges, ACs, heaters) cycle on and off, so actual running hours are lower than wall-clock hours. Use the compressor's duty cycle — e.g. a fridge running 8 effective hours out of 24. Fixed customer charges and taxes on your bill are also outside this calculation.