Length Converter
Convert between mm, cm, m, km, inches, feet, yards, and miles — all values shown at once.
How to use this tool
- 1Enter a numeric value in the Value field.
- 2Select the source unit from the 'From unit' dropdown.
- 3All eight conversions appear instantly in the grid below.
About Length Converter
Converting between metric and imperial length units is a daily task for engineers, architects, and anyone working across measurement systems. This converter stores all units as a base value in meters and converts to all eight units simultaneously: millimeter (0.001 m), centimeter (0.01 m), meter (1 m), kilometer (1000 m), inch (0.0254 m), foot (0.3048 m), yard (0.9144 m), and mile (1609.344 m). Enter a value, choose the source unit from the dropdown, and all eight conversions appear instantly in a grid. The source unit card is highlighted with a ring. Values are formatted to 7 significant figures with trailing zeros removed. Architects converting between feet and meters, engineers checking tolerances in millimeters, and travellers converting miles to kilometers are the primary users. Runs entirely in your browser.
Frequently asked questions
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