Millimeters to Kilometers Converter
1 millimeter (mm) equals 0.000001 kilometers (km).
Quick answer
1 millimeter = 0.000001 kilometers 1 kilometer = 1,000,000 millimeters
Formula: km = mm × 0.000001
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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0.000001
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 millimeter = 0.000001 kilometers
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How to convert millimeters to kilometers
km = mm × 0.000001
To convert millimeters to kilometers, multiply the number of millimeters by 0.000001.
Example: 42 mm to km
Start with the value in millimeters: 42 mm.
Multiply by 0.000001: 42 × 0.000001 = 0.000042.
Result: 42 millimeters = 0.000042 kilometers .
Going the other way, 1 kilometer = 1,000,000 millimeters, so to convert kilometers back to millimeters you divide by the same number. See kilometers to millimeters .
Millimeters to kilometers conversion table
More mm to km values
What is a millimeter?
The millimeter (also spelled millimetre) is a metric unit of length equal to one thousandth of a meter, or one tenth of a centimeter.
More about millimeters →
What is a kilometer?
The kilometer (also spelled kilometre) is a metric unit of length equal to 1,000 meters.
More about kilometers →
Convert millimeters to other units
Convert other units to kilometers
Frequently asked questions
How many kilometers are in a millimeter? One millimeter is 0.000001 kilometers.
How many millimeters are in a kilometer? One kilometer is 1,000,000 millimeters.
What is the formula to convert millimeters to kilometers? km = mm × 0.000001.