Converters
Length Unit Converter
Convert common metric and imperial length units using exact standard conversion factors.
Length conversion
Converted length
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Your converted length will appear here after you calculate.
Worked example
How far is a 5 km run in miles?
Problem
A running route is 5 km long. You want to compare it with a race distance shown in miles.
Solution
5 km is approximately 3.10686 mi.
Converters
How the conversion works
The input is first converted to metres using an exact factor, then converted from metres to the selected output unit. Calculations retain up to 12 decimal places. Concise exact results are shown in full; longer results are rounded for display and marked as approximate.
Supported units
This first version converts length only. Temperature, area, volume, mass and speed use different rules and are not mixed into this tool.