Length Converter

Convert between metric and imperial length units — centimeters, inches, millimeters, meters, feet, and more.

Works for any combination of the units above -- every value converts through the same verified base-unit math used on the individual pages.

How Length Units Relate

Length units fall into two families in everyday use: metric (millimeters, centimeters, meters, kilometers), based on powers of ten, and US customary/imperial (inches, feet, yards, miles), based on the 1959 International Yard and Pound Agreement. All conversions on this page trace back to the exact definition of 1 inch = 2.54 centimeters.

All Length Converters

Each of these has its own page with the exact formula, a reference table, and answers to common questions.

Centimeter to Inch Millimeter to Inch Inch to Centimeter Foot to Yard Yard to Foot Meter to Foot Foot to Meter Kilometer to Mile Mile to Kilometer Centimeter to Foot Millimeter to Centimeter

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