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Length Converter

Convert length measurements between metric and imperial systems.

About this calculator

Convert length measurements instantly between metric units (mm, cm, m, km) and imperial units (in, ft, yd, mi) using precise, fixed conversion factors.

How to use

  1. Enter the value you want to convert.
  2. Select the unit you are converting from.
  3. Select the unit you are converting to.
  4. Press Convert to see the result and a full equivalents table.

Tips

  • All conversions use exact SI-defined factors, so results are precise to the decimal places shown.