使い方
A useful answer in three steps.
- 01
Find the wattage on the appliance label or product specification.
- 02
Enter average daily use and the number of days you want to estimate.
- 03
Use the per-kWh rate shown on your latest utility bill.
日常・エネルギー
電気料金計算
Estimate the electricity use and running cost of any appliance by wattage, daily use, billing period, and local energy rate.
01
数値を入力
入力すると結果がすぐ更新されます。
基本式
The math behind the result.
Cost = (watts ÷ 1,000) × hours per day × days × electricity rateよくある質問
Useful before you decide.
Why is my bill higher than this estimate?
A household bill also includes other appliances, standby consumption, taxes, fixed charges, and sometimes tiered or time-of-use pricing.
Can I compare two appliances?
Yes. Calculate each appliance with the same hours and rate, then compare the monthly and annual results.
What if an appliance cycles on and off?
Use its average power draw if available. A rated maximum wattage can overestimate devices such as refrigerators and air conditioners that cycle.