Length Converter
Millimetres to miles and everything between.
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About Length Converter
Length Converter shows a value in every unit at once — millimetres through to miles — rather than making you pick a target first. Metric and imperial are both covered, which is the usual reason for reaching for a converter at all.
How to use it
- Type a value and pick the unit it is in.
- Choose the unit you want, or just read the full list underneath.
- Use the swap button to reverse the direction.
Questions
How many centimetres in an inch?
Exactly 2.54. The inch has been defined against the metre since 1959, so it is an exact conversion, not an approximation.
Why do I get long decimals?
Because most metric-to-imperial conversions are not round numbers. Values are shown to six significant figures and trailing zeros are trimmed.
Length Converter is free and runs entirely in your browser. No account, no upload, no watermark, no limit on use.