Kilometers to Nautical Miles Converter

To convert a measurement in kilometers to nautical miles, multiply the value by 0.5399568035. The conversion factor comes from the relationship between both units and the meter (the SI base unit of length).

For example, to convert 5 km to nautical miles: 5 × 0.5399568035 = 2.699784 nmi.

A kilometer is a metric unit of length equal to 1,000 meters or approximately 0.621 miles. The kilometer was introduced with the metric system in France in 1795, derived from the Greek 'khilioi' (thousand) and 'metron' (measure). It became the standard unit for measuring road distances in most countries.

Common uses of kilometers include: Road distances and speed limits in most countries; Running events (5K, 10K, marathon distances); Geographic distances between cities; Aviation altitude reporting in some regions.

A nautical mile is a unit of length equal to exactly 1,852 meters, historically based on one minute of arc of latitude along any meridian. Developed for maritime navigation because of its convenient relationship to latitude. One nautical mile corresponds to one minute (1/60 degree) of latitude. Internationally standardized at 1,852 meters in 1929.

Common uses of nautical miles include: Maritime navigation and shipping routes; Aviation distance and airspeed (knots = nmi/hour); Territorial water boundaries (12 nmi from shore); Oceanic weather forecasting and reporting.

Maritime route planning and aviation flight planning require converting land-based kilometer distances to nautical miles for use with navigation charts and instruments.

Here are some common values converted:

1 km = 0.5399568035 nmi 5 km = 2.699784 nmi 10 km = 5.399568 nmi 50 km = 26.99784 nmi 100 km = 53.99568 nmi