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    Convert Kilometers to Nautical Miles

    1 kilometer (km) equals 0.5399568035 nautical miles (nmi).

    km
    Swap: convert nautical miles to kilometers
    nmi

    1 km = 0.5399568035 nmi

    Type in either box. Scientific notation works: 1.5e-3.

    Converting a list? Use the bulk kilometer to nautical mile converter to paste a column from Excel.

    How to Convert Kilometer to Nautical Mile

    • 1 km = 0.5399568035 nmi
    • 1 nmi = 1.852 km
    • Example: convert 15 km to nmi: 15 km = 15 × 0.5399568035 nmi = 8.099352052 nmi

    Formula

    nmi = km × 0.5399568034557

    or nmi = km ÷ 1.852

    Derivation from SI units:

    • 1 km = 10³ m
    • 1 nmi = 1852 m (exact, by international agreement, 1929)
    • 1 km = 1000 m ÷ 1852 m per nmi = 0.5399568034557 nmi

    Both units are defined exactly, so the factor is exact. Kilometer definition: kilometer; Nautical Mile definition: nautical mile.

    Worked examples

    1. A 100 km sea passage is 53.99568035 nmi.
      100 km × 0.5399568035 = 53.99568035 nmi
    2. 1 km is 0.5399568035 nmi.
      1 km × 0.5399568035 = 0.5399568035 nmi

    Kilometer to Nautical Mile conversion table

    Kilometer to Nautical Mile conversion table
    Kilometers (km)Nautical Miles (nmi)
    0.1 km0.05399568035 nmi
    0.5 km0.2699784017 nmi
    1 km0.5399568035 nmi
    1.5 km0.8099352052 nmi
    2 km1.079913607 nmi
    3 km1.61987041 nmi
    5 km2.699784017 nmi
    8 km4.319654428 nmi
    10 km5.399568035 nmi
    15 km8.099352052 nmi
    20 km10.79913607 nmi
    21.0975 km11.39173866 nmi
    25 km13.49892009 nmi
    42.195 km22.78347732 nmi
    50 km26.99784017 nmi
    80 km43.19654428 nmi
    100 km53.99568035 nmi
    160 km86.39308855 nmi
    200 km107.9913607 nmi
    500 km269.9784017 nmi
    1000 km539.9568035 nmi

    Where it's used

    Land-based distances in kilometres are converted to nautical miles for navigation and flight planning. Divide by 1.852.

    Kilometer to other length units

    1 km expressed in every length unit
    Conversion1 km equals
    kilometer to meter 1000 m
    kilometer to centimeter 100000 cm
    kilometer to millimeter 1000000 mm
    kilometer to micrometer 1000000000 µm
    kilometer to nanometer 1000000000000 nm
    kilometer to angstrom 10000000000000 Å
    kilometer to mile 0.6213711922 mi
    kilometer to yard 1093.613298 yd
    kilometer to foot 3280.839895 ft
    kilometer to inch 39370.07874 in
    kilometer to mil 39370078.74 mil
    kilometer to nautical mile 0.5399568035 nmi

    Frequently asked questions

    How many nautical miles is 1 km?

    1 km = 0.539957 nmi.

    How many nautical miles are in 1 kilometer?

    1 km = 0.5399568035 nmi.

    How do I convert kilometers to nautical miles?

    Multiply the value in km by 0.5399568035, or divide it by 1.852. For example, 15 km × 0.5399568035 = 8.099352052 nmi.

    Is the km to nmi conversion exact?

    Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).

    Sources

    Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.

    Cite this page

    APA

    Scientific Converters. (2026, October 15). Convert Kilometers to Nautical Miles. Retrieved October 17, 2026, from https://scientificconverters.com/length/kilometers-to-nautical-miles/

    IEEE

    Scientific Converters, "Convert Kilometers to Nautical Miles," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/length/kilometers-to-nautical-miles/