单位换算器Unit Converter
长度/重量/温度/面积/体积单位换算Length/weight/temperature/area/volume unit converter.
关于 单位换算器About Unit Converter
英里换算公里、磅换算公斤、华氏度换算摄氏度——背系数不如用工具。本工具覆盖长度、重量、温度、面积、体积等多类单位，输入数值实时互转，出国旅行、海淘购物、工程换算都适用。Miles to kilometres, pounds to kilograms, Fahrenheit to Celsius — why memorise factors? This tool covers length, weight, temperature, area and volume with real-time conversion, useful for travel, overseas shopping and engineering alike.
使用方法How to Use
- 选择换算类别（长度/重量/温度等）。Choose a category (length/weight/temperature, etc.).
- 输入数值并选择源单位。Enter a value and pick the source unit.
- 选择目标单位，结果实时展示。Pick the target unit; the result appears instantly.
- 点击交换按钮可反向换算。Use the swap button to convert in reverse.
常见问题FAQ
华氏度和摄氏度怎么换算？How do I convert Fahrenheit to Celsius?
°C = (°F − 32) × 5/9。工具自动完成换算，无需记公式；记住“0°C = 32°F、100°C = 212°F”两个锚点即可建立直觉。°C = (°F − 32) × 5/9. The tool converts automatically; remembering the anchors 0°C = 32°F and 100°C = 212°F builds intuition.
英里和公里差多少？How many kilometres in a mile?
1 英里 ≈ 1.609 公里。马拉松全程 26.2 英里 ≈ 42.195 公里，是最常见的换算场景之一。1 mile ≈ 1.609 km. A marathon’s 26.2 miles ≈ 42.195 km — one of the most common conversions.
温度换算和长度换算有何不同？How does temperature conversion differ from length?
长度等是比例换算（乘系数），温度还涉及零点偏移（加减常数），工具已按各自公式精确处理。Length is a pure ratio (multiply by a factor); temperature also shifts the zero point (add a constant). The tool applies each formula exactly.