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长度转换器

即时转换长度单位 — 毫米、厘米、米、千米、英寸、英尺、码和英里之间的转换。

即时转换常见长度和距离单位

结果
输入数值进行转换
转换使用精确的标准系数。1 英寸 = 2.54 厘米，1 英尺 = 12 英寸，1 码 = 3 英尺，1 英里 = 1,609.344 米。

How to Use This Tool

  1. 1

    Enter a value

    Type the numeric length value you want to convert into the input field.

  2. 2

    Select the source unit

    Choose the unit you are converting from: millimeters, centimeters, meters, kilometers, inches, feet, yards, or miles.

  3. 3

    Choose the target unit

    Pick the unit you want to convert to. Use the swap button to quickly reverse the conversion direction.

  4. 4

    View all conversions

    The result appears instantly. Below it, an 'All Units' table shows your value converted to every supported length unit at once.

Frequently Asked Questions

How many centimeters are in an inch?
One inch equals exactly 2.54 centimeters. This is an internationally recognized standard defined since 1959.
What is the difference between metric and imperial length units?
Metric units (mm, cm, m, km) are based on powers of 10, making conversions simple. Imperial units (in, ft, yd, mi) use varying factors (12 inches per foot, 3 feet per yard, 5280 feet per mile).
Can I convert negative length values?
Yes. The converter handles negative numbers for mathematical completeness, though negative lengths have no physical meaning.
How precise are the conversions?
Results are displayed with up to 8 significant digits, providing high precision suitable for engineering, science, and everyday use.