免费电费计算器
根据用电量和电价计算月度和年度电费。
W
hrs
USD/kWh
days
每月费用
$25.20
每日费用$0.84
年费用$306.60
Monthly kWh180.0 kWh
Monthly Cost vs Days Per Month
公式
How to Calculate Electricity Cost
Convert wattage to kilowatts, multiply by usage hours to get kWh, then multiply by your utility rate.
Formula
Daily kWh = Wattage / 1000 x Hours Per Day
Daily Cost = kWh x Rate Per kWh
计算示例
A 1,500W space heater running 4 hours/day at $0.14/kWh.
- 01Daily kWh = 1,500 / 1,000 x 4 = 6.0 kWh
- 02Daily cost = 6.0 x $0.14 = $0.84
- 03Monthly cost = $0.84 x 30 = $25.20
- 04Annual cost = $0.84 x 365 = $306.60
常见问题
How do I find my electricity rate?
Check your utility bill for the cost per kilowatt-hour (kWh). The US average is about $0.12-$0.16/kWh, but rates vary widely by state and provider.
What appliances use the most electricity?
Space heaters, air conditioners, water heaters, dryers, and ovens are typically the biggest energy users. Always check the wattage on the appliance label.
How do I reduce electricity costs?
Use LED bulbs, unplug idle devices, use a programmable thermostat, wash clothes in cold water, and replace old appliances with Energy Star rated ones.
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