家电能耗计算器
使用家电能耗计算器估算各类家用电器的年度用电量和电费支出。输入功率和使用时间，快速了解每台家电的kWh消耗及运行成本，帮助您节能省钱。
年费用
246.38 USD
Annual Cost vs Days Used per Year
公式
How to Calculate Appliance Energy Cost
Every electrical appliance has a wattage rating that determines how much energy it uses.
Formula
Annual kWh = Wattage * Hours/Day * Days/Year / 1,000
Annual Cost = Annual kWh * Rate per kWh
Common Appliance Wattages
计算示例
A 1,500W space heater used 3 hours/day for 365 days at $0.15/kWh.
- 01Annual kWh: 1,500 * 3 * 365 / 1,000 = 1,642.5 kWh
- 02Annual cost: 1,642.5 * $0.15 = $246.38
- 03Monthly cost: $246.38 / 12 = $20.53
- 04Daily kWh: 1,500 * 3 / 1,000 = 4.5 kWh
常见问题
Where do I find my appliance wattage?
Check the label on the appliance, the user manual, or the manufacturer website. Wattage is usually listed on a sticker near the power cord or on the bottom of the device.
Which appliances use the most electricity?
HVAC systems, water heaters, clothes dryers, and electric ovens are typically the largest energy consumers. Refrigerators use moderate power but run 24/7.
Does an appliance use energy when turned off?
Many appliances draw standby or phantom power when plugged in but off. TVs, gaming consoles, and chargers commonly draw 1-10 watts in standby mode.