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Length & Distance Converters
Convert between kilometres, miles, metres, feet, inches and more. Instant length converters with formulas, tables and worked examples.
About length conversions
Length and distance are measured in two parallel systems: the metric system (millimetres, centimetres, metres and kilometres) and the imperial/US system (inches, feet, yards and miles). Because product specs, maps, travel directions and academic work mix both, converting accurately between them is one of the most common everyday calculations.
Every length conversion is linear — a single fixed factor maps one unit to another. Below you'll find the key factors, the metric base relationships and instant converters for each popular pair, so you can move between km, miles, metres, feet, inches and centimetres without rounding errors.
Key formulas
Kilometres to miles
miles = km × 0.621371
Miles to kilometres
km = miles × 1.609344
Metres to feet
feet = m × 3.28084
Centimetres to inches
inches = cm × 0.393701
Metric base
1 m = 100 cm = 1000 mm = 0.001 km
Popular length conversions
Worked examples
- •A 5 km run is about 3.11 miles.
- •A 6 ft person is roughly 1.83 metres tall.
- •A 30 cm ruler is about 11.81 inches.
All length converters
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Instant answers for the specific amounts people search most.
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