电费计算器
使用时间和能源价格。
输入结果时更新 。
关于此计算器
An electricity cost calculator turns an appliance’s wattage into money by tracing the chain from power to energy to price. Energy in kilowatt-hours is power in kilowatts times hours of use, so a device’s daily energy is its watts ÷ 1,000, multiplied by the hours it runs each day; the cost is that energy times your price per kWh. Advanced fields let you set the number of identical units and how many days a week they run, so occasional loads are averaged fairly across the calendar.
As a worked example, a 100 W device left on 5 hours a day uses 0.1 kW × 5 = 0.5 kWh daily. At $0.15 per kWh that is about $0.075 a day, which works out to roughly $2.28 a month and $27.40 a year (the tool uses 30.44 days per month and 365.25 days per year for accuracy). A 1,500 W space heater run the same 5 hours costs fifteen times as much — around $1.13 a day — which quickly shows why high-wattage heating dominates a power bill.
The calculator returns the daily, monthly and yearly cost plus the annual energy in kWh, and a period-by-period schedule you can open to compare day, week, month and year. It is the practical way to decide whether an old fridge is worth replacing, budget for a new appliance, spot the phantom cost of always-on devices, or compare the running cost of two products with different wattages.
经常问到的问题
如何计算电器的运行成本?
Daily energy in kWh is the power in kilowatts (watts ÷ 1000) times the hours it runs per day. Multiply by your price per kWh for the daily cost, then by 30 or 365 for monthly and yearly figures.
100W装置要多少钱?
At 5 hours a day it uses 0.1 kW × 5 = 0.5 kWh daily. At $0.15 per kWh that is about $0.075 a day, roughly $2.25 a month or $27 a year.
备用电源算不算?
是的, 许多设备即使关闭时也抽出几瓦。 如果您想要包括待命, 增加其时数的瓦数, 它闲置, 或者对待命载荷进行单独计算 。
我一次要几台相同的电器怎么花?
Use the advanced "number of units" field. Ten 10 W bulbs run together cost the same as one 100 W load, so the calculator multiplies the energy by the quantity before applying your price per kWh.
如果这家电器只开几天呢?
工具在全部日历中平均能量——使用5天的装置,使用7天,连续使用5/7天——因此月度和年度数字保持现实。
如何找到电器的瓦特?
检查评分标签、 名牌或手动, 通常以瓦特或伏特和安普斯( 将瓦特乘以瓦特) 给出。 对于真实世界的图, 插件能量监测器可以测量实际抽取量, 您可以直接输入 。
为什么我的月费和年费不完全是每日费用的30倍和365倍?
计算器使用平均日历月30.44天和一年365.25天,而不是第30和365回合,因此每天费用为0.075美元,每月约2.28美元,每年27.40美元,比四舍五入估计数高出很多。
API - 使用代码中的计算器
将此计算器称为自由 JSON 端点 。 不需要按键 。 将字段值发送到下面作为查询参数或 JSON 。 任何您省略的, 都会使用相同的默认值, 此页面预填的默认值是预填的; 未知参数是 400, 而不是静音零 。 读取 API 全部文件 →
终点
GET https://calculator.free/api/v1/electricity/curl
curl "https://calculator.free/api/v1/electricity/?power=100&hours=5&rate=0.15"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/electricity/?" + new URLSearchParams({
"power": "100",
"hours": "5",
"rate": "0.15"
}));
const data = await r.json();
console.log(data.results);成果仅是一般指导的估计数,而不是财务、医疗或税务咨询。