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Length Unit Converter

Convert instantly between metric and imperial length units: mm, cm, m, km, inch, foot, yard, mile, nautical mile.

How to use

  1. 在任一单位输入框（如“米”）填入数值。
  2. 其余单位立即以“米”为基准实时换算显示。
  3. 想对比某个单位，直接改该项，所有框同步刷新。
  4. 小技巧：1 海里 ≈ 1852 米、1 英里 ≈ 1609.344 米，常用于地图与航海换算。

FAQ

How many meters in a mile?

1 mile = 1609.344 meters, a fixed factor between imperial and metric units.

Why does editing any field update all others?

All units are converted through "meter" as the base; once you enter a value in any unit, the rest are computed in real time via the meter intermediate.