长度转换器
转换毫米、厘米、米、千米、英寸、英尺、英里。
Enter a value to convert instantly between metric and imperial units of length — millimeters, centimeters, meters, kilometers, inches, feet, yards and miles. Everything runs locally in your browser.
工作原理
- 1 Type a value.
- 2 Pick the unit to convert from and to.
- 3 Copy the result, or use Swap to reverse.
常见用例
- Convert measurements for DIY or sewing.
- Switch between metric and imperial.
- Check distances in miles or kilometers.
- Convert dimensions for shipping.
常见问题
Is my input sent to a server?
No. Every calculation runs locally in your browser — your input is never uploaded, stored or logged.
Which conversion factors are used?
Exact international definitions, e.g. 1 inch = 2.54 cm and 1 mile = 1609.344 m.
Is it really free?
Yes — free, with no signup and no limits.