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Length Converter

Convert any length or distance between metric and imperial units in an instant.

How this length converter works

This tool converts a length or distance from one unit into another by first turning your input into meters (the common reference unit), then converting from meters into whatever unit you want to see. For example, a value in inches is multiplied by 0.0254 to get meters, and a value in kilometers is multiplied by 1,000.

Every conversion factor used here follows the internationally standardized metric and imperial definitions, so the results are accurate for everyday tasks like cooking, home improvement, travel distances, and school or work assignments.

  • Metric units: millimeters, centimeters, meters, kilometers.
  • Imperial/US units: inches, feet, yards, miles.

This calculator is intended for general planning and educational purposes; for engineering, legal, or scientific work that requires certified precision, confirm figures against an official reference standard.

Last reviewed August 2026