Length Converter
Convert between mm, cm, m, km, inches, feet, yards, and miles instantly.
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About this tool
Metric to imperial and back — the eternal unit shuffle. This converter covers the eight length units you actually encounter, from millimetres to miles, with exact defined factors like 1 inch = 2.54 cm.
Results update as you type, and the swap button flips the conversion direction in one tap.
How to use
- Enter the length value.
- Select the from and to units.
- Read the result; use swap to reverse the direction.
Frequently asked questions
They use exact international definitions (1 in = 2.54 cm, 1 ft = 0.3048 m, 1 mi = 1609.344 m) with full floating-point precision.
Divide centimetres by 2.5 for a close approximation — 10 cm is about 4 inches. The tool gives you the exact figure.
Yes — any numeric value works, from fractions of a millimetre to thousands of kilometres.
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