Kilometers to Nautical miles Converter
1 kilometer (km) equals 0.539956803456 nautical miles (nmi).
Quick answer
To convert km to nautical miles, divide by 1.852 (multiply by 0.53996): 100 km ≈ 54 nmi.
1 kilometer = 0.5399568035 nautical miles 1 nautical mile = 1.852 kilometers
Formula: nmi = km ÷ 1.852
Quick estimate: halve it and add 8%: 100 km → 50 + 4 = 54 nmi.
From
Inch (in) Meter (m) Centimeter (cm) Foot (ft) Kilometer (km) Mile (mi) Millimeter (mm) Yard (yd) Micrometer (µm) Nanometer (nm) Nautical mile (nmi) Light-year (ly) Astronomical unit (au) ångström (Å) Parsec (pc) Decimeter (dm) Fathom (ftm) Furlong (fur) Picometer (pm) Hand (hh) Thou (th) Chain (ch) Kiloparsec (kpc) League (lea) Megaparsec (Mpc) Rod (rd) American football field Chinese li (里) Planck length (ℓP) US survey foot (ftUS) Cable Femtometer (fm) Bohr radius (a₀) Earth radius (R⊕) Cubit Decameter (dam) Gaj Hectometer (hm) Light-second (ls) Castilian vara Roman mile Swedish mil Barleycorn Chi (尺) Cun (寸) Light-minute Link (li) Lunar distance (LD) Marathon Royal cubit Shaku (尺) Smoot Solar radius (R☉) Span Stadion Versta Biblical cubit Roman foot US survey mile Arshin Gigameter (Gm) Gigaparsec (Gpc) Light-day Light-hour Line Megameter (Mm) Admiralty mile Earth circumference Eiffel Tower height Greek foot Japanese ri (里) Jupiter radius (RJ) Olympic pool length Roman pace Spanish league Texas vara Banana Beard-second Double-decker bus Ell Ken (間) Kos Lieue Ligne Nautical league Palm Parasang Pied du roi Pulgada Sazhen Soccer pitch length Sun (寸) Toise Wa Yojana Mount Everest height Ramsden's chain US survey inch Blue whale length Credit card length Finger Human hair width Light-week Millimicron (mµ) Nail Shackle Shaftment Burj Khalifa height Castilian foot Earth diameter Egyptian common cubit Egyptian digit Egyptian palm Empire State Building height Gallic league Greek cubit Greek finger Hubble length Irish mile Korean ri (리) Mexican vara Prussian mile Roman cubit Roman digit Roman inch Roman palm Roman stadium Roman step Russian mile Scottish mile Statue of Liberty height X unit (xu) Angul Attoparsec (apc) Braca Classical electron radius (rₑ) Electron Compton wavelength (λC) Farsakh Handbreadth Hasta Human height Legua Pouce Vershok Zhang (丈) Biblical finger Biblical parasang Biblical span Chinese bu (步) Chinese fen (分) Chinese li (small) (厘) Danish mile French point Greek palm Greek span Japanese bu (分) Korean chi (치) Portuguese foot Portuguese vara Prussian ell Prussian foot Prussian inch Prussian rod Rhineland rod Russian foot Sabbath day's journey Swiss hour Talmudic mil Aln Arsin Aune Barid Bema Beru Cho (町) Danda Day's journey Dhira Diaulos Dichas Duim Dyuym Famn Giraffe height Grain of rice Hippikon Iteru Ja (자) Jo (丈) Khet Khuep Kondylos Kujirajaku Kush Liniya Nindan Nio Orgyia Palmo Paperclip length Pencil length Plethron Polegada Pyad Pygme Qasaba Reed Remen Sen Sheppey Shu-si Siriometer Smartphone length Sok Ush Yin (引) Yot Japanese rin (厘) Korean bun (푼) Spanish pace Welsh mile Fjardingsvag Hao (毫) Hu (忽) Kraphiat Linea Linha Mo (毛) Punto Si (丝) Tochka
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0.5399568035
Inch (in) Meter (m) Centimeter (cm) Foot (ft) Kilometer (km) Mile (mi) Millimeter (mm) Yard (yd) Micrometer (µm) Nanometer (nm) Nautical mile (nmi) Light-year (ly) Astronomical unit (au) ångström (Å) Parsec (pc) Decimeter (dm) Fathom (ftm) Furlong (fur) Picometer (pm) Hand (hh) Thou (th) Chain (ch) Kiloparsec (kpc) League (lea) Megaparsec (Mpc) Rod (rd) American football field Chinese li (里) Planck length (ℓP) US survey foot (ftUS) Cable Femtometer (fm) Bohr radius (a₀) Earth radius (R⊕) Cubit Decameter (dam) Gaj Hectometer (hm) Light-second (ls) Castilian vara Roman mile Swedish mil Barleycorn Chi (尺) Cun (寸) Light-minute Link (li) Lunar distance (LD) Marathon Royal cubit Shaku (尺) Smoot Solar radius (R☉) Span Stadion Versta Biblical cubit Roman foot US survey mile Arshin Gigameter (Gm) Gigaparsec (Gpc) Light-day Light-hour Line Megameter (Mm) Admiralty mile Earth circumference Eiffel Tower height Greek foot Japanese ri (里) Jupiter radius (RJ) Olympic pool length Roman pace Spanish league Texas vara Banana Beard-second Double-decker bus Ell Ken (間) Kos Lieue Ligne Nautical league Palm Parasang Pied du roi Pulgada Sazhen Soccer pitch length Sun (寸) Toise Wa Yojana Mount Everest height Ramsden's chain US survey inch Blue whale length Credit card length Finger Human hair width Light-week Millimicron (mµ) Nail Shackle Shaftment Burj Khalifa height Castilian foot Earth diameter Egyptian common cubit Egyptian digit Egyptian palm Empire State Building height Gallic league Greek cubit Greek finger Hubble length Irish mile Korean ri (리) Mexican vara Prussian mile Roman cubit Roman digit Roman inch Roman palm Roman stadium Roman step Russian mile Scottish mile Statue of Liberty height X unit (xu) Angul Attoparsec (apc) Braca Classical electron radius (rₑ) Electron Compton wavelength (λC) Farsakh Handbreadth Hasta Human height Legua Pouce Vershok Zhang (丈) Biblical finger Biblical parasang Biblical span Chinese bu (步) Chinese fen (分) Chinese li (small) (厘) Danish mile French point Greek palm Greek span Japanese bu (分) Korean chi (치) Portuguese foot Portuguese vara Prussian ell Prussian foot Prussian inch Prussian rod Rhineland rod Russian foot Sabbath day's journey Swiss hour Talmudic mil Aln Arsin Aune Barid Bema Beru Cho (町) Danda Day's journey Dhira Diaulos Dichas Duim Dyuym Famn Giraffe height Grain of rice Hippikon Iteru Ja (자) Jo (丈) Khet Khuep Kondylos Kujirajaku Kush Liniya Nindan Nio Orgyia Palmo Paperclip length Pencil length Plethron Polegada Pyad Pygme Qasaba Reed Remen Sen Sheppey Shu-si Siriometer Smartphone length Sok Ush Yin (引) Yot Japanese rin (厘) Korean bun (푼) Spanish pace Welsh mile Fjardingsvag Hao (毫) Hu (忽) Kraphiat Linea Linha Mo (毛) Punto Si (丝) Tochka
1 kilometer = 0.5399568035 nautical miles
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How to convert kilometers to nautical miles
nmi = km ÷ 1.852
To convert kilometers to nautical miles, divide the number of kilometers by 1.852.
Example: 18 km to nmi
Start with the value in kilometers: 18 km.
Divide by 1.852: 18 ÷ 1.852 = 9.719222462.
Result: 18 kilometers = 9.719222462 nautical miles .
Going the other way, 1 nautical mile = 1.852 kilometers, so to convert nautical miles back to kilometers you multiply by the same number. See nautical miles to kilometers .
Where the conversion factor comes from
One nautical mile is exactly 1,852 m.
Mental math: km to nmi in your head
Halve it and add about 8%.
When you need to convert kilometers to nautical miles
Flight planning and sailing with metric maps.
Common mistakes
Confusing nautical miles with statute miles.
Everyday kilometers in nautical miles
Example Kilometers Nautical miles
English Channel (narrowest) 33 km 17.819 nmi Mediterranean crossing (short) 150 km 80.994 nmi
Kilometers to nautical miles conversion table
More km to nmi values
What is a kilometer?
The kilometer (also spelled kilometre) is a metric unit of length equal to 1,000 meters.
More about kilometers →
What is a nautical mile?
The nautical mile is a unit of distance used at sea and in the air, equal to exactly 1,852 meters, or about 1.151 statute miles.
More about nautical miles →
Convert kilometers to other units
Convert other units to nautical miles
Frequently asked questions
How many nautical miles are in a kilometer? One kilometer is 0.5399568035 nautical miles.
How many kilometers are in a nautical mile? One nautical mile is 1.852 kilometers.
What is the formula to convert kilometers to nautical miles? nmi = km ÷ 1.852.
How many nautical miles in 1 km? 0.54 nautical miles.