Convert Millimeter to Kilometer Online

Millimeter (mm)

Kilometer (km)

About Millimeter to Kilometer Conversion

This converter converts Millimeter (mm) to Kilometer (km). One Millimeter (mm) equals 0.000001 Kilometer (km).

Formula:

1 Millimeter (mm) = 0.000001 Kilometer (km)

Example:

1 mm = 0.000001 km

2 mm = 0.000002 km

Millimeter (mm) to Kilometer (km) Conversion

Millimeter to Kilometer conversion explained with exact factors, step-by-step examples, and situations where this conversion is commonly used.

Conversion Formula

Kilometer = Millimeter × 1.000000e-6

To convert Millimeter (mm) to Kilometer (km), multiply the value by 1.000000e-6. This factor is obtained by comparing their exact meter definitions.

Worked Example

Convert 1 mm to km.

Step 1: Write the formula: km = mm × 1.000000e-6
Step 2: Substitute: 1 × 1.000000e-6
Step 3: Result: 1.000000e-6 km

So, 1 mm = 1.000000e-6 km.

About the Units

Millimeter (mm)

One Millimeter (mm) equals 1.000000e-6 Kilometer (km)

Common in precision engineering and laboratory measurement.

Kilometer (km)

One Kilometer (km) equals 1.000000e+6 Millimeter (mm)

A widely used unit across scientific, engineering, and measurement contexts.

Where This Conversion Is Used

Converting values from Millimeter to Kilometer for engineering or scientific workflows.
Used when normalizing mixed-unit datasets requiring consistent Kilometer representation.
Applied when comparing different measurement systems across tools and documents.

Frequently Asked Questions

How many Kilometer (km) are in 1 Millimeter (mm)?

1 mm = 1.000000e-6 km.

What is the formula for converting Millimeter (mm) to Kilometer (km)?

Multiply the mm value by 1.000000e-6.

Can I reverse the conversion?

Yes. 1 km = 1.000000e+6 mm.

Conclusion

By applying the conversion factor shown above, you can reliably convert Millimeter (mm) to Kilometer (km) for use in scientific analysis, engineering calculations, academic work, or daily measurements.

Quick Links for Unit Converters

Convert Millimeter to Other Units

Millimeter to Inch

1 mm = 0.03937007874015748 in

1 Millimeter (mm) = 0.03937007874015748 Inch (in)

1 millimeter equals 0.03937007874015748 inch.

Millimeter to Foot

1 mm = 0.0032808398950131233 ft

1 Millimeter (mm) = 0.0032808398950131233 Foot (ft)

1 millimeter equals 0.0032808398950131233 foot.

Millimeter to Feet

1 mm = 0.0032808398950131233 ft

1 Millimeter (mm) = 0.0032808398950131233 Feet (ft)

1 millimeter equals 0.0032808398950131233 feet.

Millimeter to Centimeter

1 mm = 0.1 cm

1 Millimeter (mm) = 0.1 Centimeter (cm)

1 millimeter equals 0.1 centimeter.

Millimeter to Meter

1 mm = 0.001 m

1 Millimeter (mm) = 0.001 Meter (m)

1 millimeter equals 0.001 meter.

Millimeter to Kilometer

1 mm = 0.000001 km

1 Millimeter (mm) = 0.000001 Kilometer (km)

1 millimeter equals 0.000001 kilometer.

Millimeter to Yard

1 mm = 0.0010936132983377078 yd

1 Millimeter (mm) = 0.0010936132983377078 Yard (yd)

1 millimeter equals 0.0010936132983377078 yard.

Millimeter to Yoctometer

1 mm = 1.0000000000000001e+21 ym

1 Millimeter (mm) = 1.0000000000000001e+21 Yoctometers (ym)

1 millimeter equals 1.0000000000000001e+21 yoctometers.

Millimeter to Zeptometer

1 mm = 1000000000000000100 zm

1 Millimeter (mm) = 1000000000000000100 Zeptometers (zm)

1 millimeter equals 1000000000000000100 zeptometers.

Millimeter to Attometer

1 mm = 1000000000000000 am

1 Millimeter (mm) = 1000000000000000 Attometers (am)

1 millimeter equals 1000000000000000 attometers.

Millimeter to Femtometer

1 mm = 1000000000000 fm

1 Millimeter (mm) = 1000000000000 Femtometers (fm)

1 millimeter equals 1000000000000 femtometers.

Millimeter to Picometer

1 mm = 1000000000 pm

1 Millimeter (mm) = 1000000000 Picometers (pm)

1 millimeter equals 1000000000 picometers.

Millimeter to Nanometer

1 mm = 1000000 nm

1 Millimeter (mm) = 1000000 Nanometers (nm)

1 millimeter equals 1000000 nanometers.

Millimeter to Micrometer

1 mm = 1000.0000000000001 µm

1 Millimeter (mm) = 1000.0000000000001 Micrometers (µm)

1 millimeter equals 1000.0000000000001 micrometers.

Millimeter to Decimeter

1 mm = 0.01 dm

1 Millimeter (mm) = 0.01 Decimeter (dm)

1 millimeter equals 0.01 decimeter.

Millimeter to Decameter

1 mm = 0.0001 dam

1 Millimeter (mm) = 0.0001 Decameter (dam)

1 millimeter equals 0.0001 decameter.

Millimeter to Hectometer

1 mm = 0.00001 hm

1 Millimeter (mm) = 0.00001 Hectometer (hm)

1 millimeter equals 0.00001 hectometer.

Millimeter to Megameter

1 mm = 1e-9 Mm

1 Millimeter (mm) = 1e-9 Megameter (Mm)

1 millimeter equals 1e-9 megameter.

Millimeter to Gigameter

1 mm = 1e-12 Gm

1 Millimeter (mm) = 1e-12 Gigameter (Gm)

1 millimeter equals 1e-12 gigameter.

Millimeter to Terameter

1 mm = 1e-15 Tm

1 Millimeter (mm) = 1e-15 Terameter (Tm)

1 millimeter equals 1e-15 terameter.

Millimeter to Petameter

1 mm = 1e-18 Pm

1 Millimeter (mm) = 1e-18 Petameter (Pm)

1 millimeter equals 1e-18 petameter.

Millimeter to Exameter

1 mm = 1.0000000000000001e-21 Em

1 Millimeter (mm) = 1.0000000000000001e-21 Exameter (Em)

1 millimeter equals 1.0000000000000001e-21 exameter.

Millimeter to Zettameter

1 mm = 1.0000000000000001e-24 Zm

1 Millimeter (mm) = 1.0000000000000001e-24 Zettameter (Zm)

1 millimeter equals 1.0000000000000001e-24 zettameter.

Millimeter to Yottameter

1 mm = 1e-27 Ym

1 Millimeter (mm) = 1e-27 Yottameter (Ym)

1 millimeter equals 1e-27 yottameter.

Millimeter to Cubit

1 mm = 0.0021872265966754157 cubit

1 Millimeter (mm) = 0.0021872265966754157 Cubit (cubit)

1 millimeter equals 0.0021872265966754157 cubit.

Millimeter to Span

1 mm = 0.004374453193350831 span

1 Millimeter (mm) = 0.004374453193350831 Span (span)

1 millimeter equals 0.004374453193350831 span.

Millimeter to Hand

1 mm = 0.00984251968503937 hh

1 Millimeter (mm) = 0.00984251968503937 Hand (hh)

1 millimeter equals 0.00984251968503937 hand.

Millimeter to Palm

1 mm = 0.013123359580052493 palm

1 Millimeter (mm) = 0.013123359580052493 Palm (palm)

1 millimeter equals 0.013123359580052493 palm.

Millimeter to Digit

1 mm = 0.05249343832020997 digit

1 Millimeter (mm) = 0.05249343832020997 Digit (digit)

1 millimeter equals 0.05249343832020997 digit.

Millimeter to Link

1 mm = 0.004970969537898671 link

1 Millimeter (mm) = 0.004970969537898671 Link (link)

1 millimeter equals 0.004970969537898671 link.

Millimeter to Ell

1 mm = 0.0008748906386701663 ell

1 Millimeter (mm) = 0.0008748906386701663 Ell (ell)

1 millimeter equals 0.0008748906386701663 ell.

Millimeter to Barleycorn

1 mm = 0.1180637544273908 barleycorn

1 Millimeter (mm) = 0.1180637544273908 Barleycorn (barleycorn)

1 millimeter equals 0.1180637544273908 barleycorn.

Millimeter to Astronomical Unit

1 mm = 6.684587122268446e-15 AU

1 Millimeter (mm) = 6.684587122268446e-15 Astronomical Unit (AU)

1 millimeter equals 6.684587122268446e-15 Astronomicalunit.

Millimeter to Light-Second

1 mm = 3.3356409519815207e-12 ls

1 Millimeter (mm) = 3.3356409519815207e-12 Light-Second (ls)

1 millimeter equals 3.3356409519815207e-12 Light-Second.

Millimeter to Light-Minute

1 mm = 5.559401586635868e-14 lm

1 Millimeter (mm) = 5.559401586635868e-14 Light-Minute (lm)

1 millimeter equals 5.559401586635868e-14 Light-Minute.

Millimeter to Light-Hour

1 mm = 9.265669309342728e-16 lh

1 Millimeter (mm) = 9.265669309342728e-16 Light-Hour (lh)

1 millimeter equals 9.265669309342728e-16 Light-Hour.

Millimeter to Light-Day

1 mm = 3.860695546453768e-17 ld

1 Millimeter (mm) = 3.860695546453768e-17 Light-Day (ld)

1 millimeter equals 3.860695546453768e-17 Light-Day.

Millimeter to Light-Year

1 mm = 1.0570008340246155e-19 ly

1 Millimeter (mm) = 1.0570008340246155e-19 Light-Year (ly)

1 millimeter equals 1.0570008340246155e-19 Light-Year.

Millimeter to Parsec

1 mm = 3.2407792894443624e-20 pc

1 Millimeter (mm) = 3.2407792894443624e-20 Parsec (pc)

1 millimeter equals 3.2407792894443624e-20 Parsec.

Millimeter to Kiloparsec

1 mm = 3.2407792894443625e-23 kpc

1 Millimeter (mm) = 3.2407792894443625e-23 Kiloparsec (kpc)

1 millimeter equals 3.2407792894443625e-23 Kiloparsec.

Millimeter to Megaparsec

1 mm = 3.240779289444362e-26 Mpc

1 Millimeter (mm) = 3.240779289444362e-26 Megaparsec (Mpc)

1 millimeter equals 3.240779289444362e-26 Megaparsec.

Millimeter to Gigaparsec

1 mm = 3.2407792894443624e-29 Gpc

1 Millimeter (mm) = 3.2407792894443624e-29 Gigaparsec (Gpc)

1 millimeter equals 3.2407792894443624e-29 Gigaparsec.

Millimeter to Nautical Mile

1 mm = 5.399568034557235e-7 NM

1 Millimeter (mm) = 5.399568034557235e-7 Nautical Mile (NM)

1 millimeter equals 5.399568034557235e-7 Nautical Mile.

Millimeter to Fathom

1 mm = 0.0005468066491688539 ftm

1 Millimeter (mm) = 0.0005468066491688539 Fathom (ftm)

1 millimeter equals 0.0005468066491688539 fathom.

Millimeter to Cable Length

1 mm = 0.000004556722076407116 cable

1 Millimeter (mm) = 0.000004556722076407116 Cable Length (cable)

1 millimeter equals 0.000004556722076407116 Cable Length .

Millimeter to Nautical League

1 mm = 1.7998560115190786e-7 NL

1 Millimeter (mm) = 1.7998560115190786e-7 Nautical League (NL)

1 millimeter equals 1.7998560115190786e-7 Nautical League.

Millimeter to Thou

1 mm = 39.37007874015748 mil

1 Millimeter (mm) = 39.37007874015748 Thous (mil)

1 millimeter equals 39.37007874015748 thous.

Millimeter to Rod

1 mm = 0.00019883878151594686 rd

1 Millimeter (mm) = 0.00019883878151594686 Rod (rd)

1 millimeter equals 0.00019883878151594686 rod.

Millimeter to Chain

1 mm = 0.000049709695378986714 ch

1 Millimeter (mm) = 0.000049709695378986714 Chain (ch)

1 millimeter equals 0.000049709695378986714 chain.

Millimeter to Furlong

1 mm = 0.000004970969537898672 fur

1 Millimeter (mm) = 0.000004970969537898672 Furlong (fur)

1 millimeter equals 0.000004970969537898672 furlong.

Millimeter to Mile

1 mm = 6.21371192237334e-7 mi

1 Millimeter (mm) = 6.21371192237334e-7 Mile (mi)

1 millimeter equals 6.21371192237334e-7 mile.

Millimeter to League

1 mm = 2.07123730745778e-7 lea

1 Millimeter (mm) = 2.07123730745778e-7 League (lea)

1 millimeter equals 2.07123730745778e-7 league.

Convert Kilometer to Other Units

Kilometer to Inch

1 km = 39370.078740157485 in

1 Kilometer (km) = 39370.078740157485 Inches (in)

1 kilometer equals 39370.078740157485 inches.

Kilometer to Foot

1 km = 3280.839895013123 ft

1 Kilometer (km) = 3280.839895013123 Feet (ft)

1 kilometer equals 3280.839895013123 feet.

Kilometer to Feet

1 km = 3280.839895013123 ft

1 Kilometer (km) = 3280.839895013123 Feets (ft)

1 kilometer equals 3280.839895013123 feets.

Kilometer to Centimeter

1 km = 100000 cm

1 Kilometer (km) = 100000 Centimeters (cm)

1 kilometer equals 100000 centimeters.

Kilometer to Meter

1 km = 1000 m

1 Kilometer (km) = 1000 Meters (m)

1 kilometer equals 1000 meters.

Kilometer to Millimeter

1 km = 1000000 mm

1 Kilometer (km) = 1000000 Millimeters (mm)

1 kilometer equals 1000000 millimeters.

Kilometer to Yard

1 km = 1093.6132983377079 yd

1 Kilometer (km) = 1093.6132983377079 Yards (yd)

1 kilometer equals 1093.6132983377079 yards.

Kilometer to Yoctometer

1 km = 1e+27 ym

1 Kilometer (km) = 1e+27 Yoctometers (ym)

1 kilometer equals 1e+27 yoctometers.

Kilometer to Zeptometer

1 km = 1.0000000000000001e+24 zm

1 Kilometer (km) = 1.0000000000000001e+24 Zeptometers (zm)

1 kilometer equals 1.0000000000000001e+24 zeptometers.

Kilometer to Attometer

1 km = 999999999999999900000 am

1 Kilometer (km) = 999999999999999900000 Attometers (am)

1 kilometer equals 999999999999999900000 attometers.

Kilometer to Femtometer

1 km = 999999999999999900 fm

1 Kilometer (km) = 999999999999999900 Femtometers (fm)

1 kilometer equals 999999999999999900 femtometers.

Kilometer to Picometer

1 km = 1000000000000000 pm

1 Kilometer (km) = 1000000000000000 Picometers (pm)

1 kilometer equals 1000000000000000 picometers.

Kilometer to Nanometer

1 km = 999999999999.9999 nm

1 Kilometer (km) = 999999999999.9999 Nanometers (nm)

1 kilometer equals 999999999999.9999 nanometers.

Kilometer to Micrometer

1 km = 1000000000 µm

1 Kilometer (km) = 1000000000 Micrometers (µm)

1 kilometer equals 1000000000 micrometers.

Kilometer to Decimeter

1 km = 10000 dm

1 Kilometer (km) = 10000 Decimeters (dm)

1 kilometer equals 10000 decimeters.

Kilometer to Decameter

1 km = 100 dam

1 Kilometer (km) = 100 Decameters (dam)

1 kilometer equals 100 decameters.

Kilometer to Hectometer

1 km = 10 hm

1 Kilometer (km) = 10 Hectometers (hm)

1 kilometer equals 10 hectometers.

Kilometer to Megameter

1 km = 0.001 Mm

1 Kilometer (km) = 0.001 Megameter (Mm)

1 kilometer equals 0.001 megameter.

Kilometer to Gigameter

1 km = 0.000001 Gm

1 Kilometer (km) = 0.000001 Gigameter (Gm)

1 kilometer equals 0.000001 gigameter.

Kilometer to Terameter

1 km = 1e-9 Tm

1 Kilometer (km) = 1e-9 Terameter (Tm)

1 kilometer equals 1e-9 terameter.

Kilometer to Petameter

1 km = 1e-12 Pm

1 Kilometer (km) = 1e-12 Petameter (Pm)

1 kilometer equals 1e-12 petameter.

Kilometer to Exameter

1 km = 1e-15 Em

1 Kilometer (km) = 1e-15 Exameter (Em)

1 kilometer equals 1e-15 exameter.

Kilometer to Zettameter

1 km = 1e-18 Zm

1 Kilometer (km) = 1e-18 Zettameter (Zm)

1 kilometer equals 1e-18 zettameter.

Kilometer to Yottameter

1 km = 1.0000000000000001e-21 Ym

1 Kilometer (km) = 1.0000000000000001e-21 Yottameter (Ym)

1 kilometer equals 1.0000000000000001e-21 yottameter.

Kilometer to Cubit

1 km = 2187.2265966754157 cubit

1 Kilometer (km) = 2187.2265966754157 Cubits (cubit)

1 kilometer equals 2187.2265966754157 cubits.

Kilometer to Span

1 km = 4374.4531933508315 span

1 Kilometer (km) = 4374.4531933508315 Spans (span)

1 kilometer equals 4374.4531933508315 spans.

Kilometer to Hand

1 km = 9842.519685039371 hh

1 Kilometer (km) = 9842.519685039371 Hands (hh)

1 kilometer equals 9842.519685039371 hands.

Kilometer to Palm

1 km = 13123.359580052493 palm

1 Kilometer (km) = 13123.359580052493 Palms (palm)

1 kilometer equals 13123.359580052493 palms.

Kilometer to Digit

1 km = 52493.43832020997 digit

1 Kilometer (km) = 52493.43832020997 Digits (digit)

1 kilometer equals 52493.43832020997 digits.

Kilometer to Link

1 km = 4970.969537898672 link

1 Kilometer (km) = 4970.969537898672 Links (link)

1 kilometer equals 4970.969537898672 links.

Kilometer to Ell

1 km = 874.8906386701663 ell

1 Kilometer (km) = 874.8906386701663 Ells (ell)

1 kilometer equals 874.8906386701663 ells.

Kilometer to Barleycorn

1 km = 118063.75442739078 barleycorn

1 Kilometer (km) = 118063.75442739078 Barleycorns (barleycorn)

1 kilometer equals 118063.75442739078 barleycorns.

Kilometer to Astronomical Unit

1 km = 6.684587122268446e-9 AU

1 Kilometer (km) = 6.684587122268446e-9 Astronomical Unit (AU)

1 kilometer equals 6.684587122268446e-9 Astronomicalunit.

Kilometer to Light-Second

1 km = 0.0000033356409519815205 ls

1 Kilometer (km) = 0.0000033356409519815205 Light-Second (ls)

1 kilometer equals 0.0000033356409519815205 Light-Second.

Kilometer to Light-Minute

1 km = 5.5594015866358675e-8 lm

1 Kilometer (km) = 5.5594015866358675e-8 Light-Minute (lm)

1 kilometer equals 5.5594015866358675e-8 Light-Minute.

Kilometer to Light-Hour

1 km = 9.265669309342727e-10 lh

1 Kilometer (km) = 9.265669309342727e-10 Light-Hour (lh)

1 kilometer equals 9.265669309342727e-10 Light-Hour.

Kilometer to Light-Day

1 km = 3.8606955464537675e-11 ld

1 Kilometer (km) = 3.8606955464537675e-11 Light-Day (ld)

1 kilometer equals 3.8606955464537675e-11 Light-Day.

Kilometer to Light-Year

1 km = 1.0570008340246155e-13 ly

1 Kilometer (km) = 1.0570008340246155e-13 Light-Year (ly)

1 kilometer equals 1.0570008340246155e-13 Light-Year.

Kilometer to Parsec

1 km = 3.2407792894443624e-14 pc

1 Kilometer (km) = 3.2407792894443624e-14 Parsec (pc)

1 kilometer equals 3.2407792894443624e-14 Parsec.

Kilometer to Kiloparsec

1 km = 3.240779289444362e-17 kpc

1 Kilometer (km) = 3.240779289444362e-17 Kiloparsec (kpc)

1 kilometer equals 3.240779289444362e-17 Kiloparsec.

Kilometer to Megaparsec

1 km = 3.240779289444362e-20 Mpc

1 Kilometer (km) = 3.240779289444362e-20 Megaparsec (Mpc)

1 kilometer equals 3.240779289444362e-20 Megaparsec.

Kilometer to Gigaparsec

1 km = 3.2407792894443625e-23 Gpc

1 Kilometer (km) = 3.2407792894443625e-23 Gigaparsec (Gpc)

1 kilometer equals 3.2407792894443625e-23 Gigaparsec.

Kilometer to Nautical Mile

1 km = 0.5399568034557235 NM

1 Kilometer (km) = 0.5399568034557235 Nautical Mile (NM)

1 kilometer equals 0.5399568034557235 Nautical Mile.

Kilometer to Fathom

1 km = 546.8066491688539 ftm

1 Kilometer (km) = 546.8066491688539 Fathoms (ftm)

1 kilometer equals 546.8066491688539 fathoms.

Kilometer to Cable Length

1 km = 4.556722076407116 cable

1 Kilometer (km) = 4.556722076407116 Cable Lengths (cable)

1 kilometer equals 4.556722076407116 Cable Length s.

Kilometer to Nautical League

1 km = 0.17998560115190784 NL

1 Kilometer (km) = 0.17998560115190784 Nautical League (NL)

1 kilometer equals 0.17998560115190784 Nautical League.

Kilometer to Thou

1 km = 39370078.74015748 mil

1 Kilometer (km) = 39370078.74015748 Thous (mil)

1 kilometer equals 39370078.74015748 thous.

Kilometer to Rod

1 km = 198.83878151594686 rd

1 Kilometer (km) = 198.83878151594686 Rods (rd)

1 kilometer equals 198.83878151594686 rods.

Kilometer to Chain

1 km = 49.709695378986716 ch

1 Kilometer (km) = 49.709695378986716 Chains (ch)

1 kilometer equals 49.709695378986716 chains.

Kilometer to Furlong

1 km = 4.970969537898672 fur

1 Kilometer (km) = 4.970969537898672 Furlongs (fur)

1 kilometer equals 4.970969537898672 furlongs.

Kilometer to Mile

1 km = 0.621371192237334 mi

1 Kilometer (km) = 0.621371192237334 Mile (mi)

1 kilometer equals 0.621371192237334 mile.

Kilometer to League

1 km = 0.20712373074577797 lea

1 Kilometer (km) = 0.20712373074577797 League (lea)

1 kilometer equals 0.20712373074577797 league.