Convert Kilometer to Astronomical Unit Online

Kilometer (km)

Astronomical Unit (AU)

About Kilometer to Astronomical Unit Conversion

This converter converts Kilometer (km) to Astronomical Unit (AU). One Kilometer (km) equals 6.684587122268446e-9 Astronomical Unit (AU).

Formula:

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

Example:

1 km = 6.684587122268446e-9 AU

2 km = 1.3369174244536891e-8 AU

Kilometer (km) to Astronomical Unit (AU) Conversion

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

Conversion Formula

Astronomical = Kilometer × 6.684587e-9

To convert Kilometer (km) to Astronomical Unit (AU), multiply the value by 6.684587e-9. This factor is obtained by comparing their exact meter definitions.

Worked Example

Convert 1 km to AU.

Step 1: Write the formula: AU = km × 6.684587e-9
Step 2: Substitute: 1 × 6.684587e-9
Step 3: Result: 6.684587e-9 AU

So, 1 km = 6.684587e-9 AU.

About the Units

Kilometer (km)

One Kilometer (km) equals 6.684587e-9 Astronomical Unit (AU)

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

Astronomical Unit (AU)

One Astronomical Unit (AU) equals 1.495979e+8 Kilometer (km)

Used for extremely large distances such as astronomical or planetary scales.

Where This Conversion Is Used

Converting values from Kilometer to Astronomical for engineering or scientific workflows.
Used when normalizing mixed-unit datasets requiring consistent Astronomical representation.
Applied when comparing different measurement systems across tools and documents.
Essential in astronomy, orbital mechanics, and large-scale simulations.

Frequently Asked Questions

How many Astronomical Unit (AU) are in 1 Kilometer (km)?

1 km = 6.684587e-9 AU.

What is the formula for converting Kilometer (km) to Astronomical Unit (AU)?

Multiply the km value by 6.684587e-9.

Can I reverse the conversion?

Yes. 1 AU = 1.495979e+8 km.

Conclusion

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

Quick Links for Unit Converters

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.

Convert Astronomical Unit to Other Units

Astronomical Unit to Inch

1 AU = 5889679948818.897 in

1 Astronomical Unit (AU) = 5889679948818.897 Inches (in)

1 Astronomicalunit equals 5889679948818.897 inches.

Astronomical Unit to Foot

1 AU = 490806662401.57477 ft

1 Astronomical Unit (AU) = 490806662401.57477 Feet (ft)

1 Astronomicalunit equals 490806662401.57477 feet.

Astronomical Unit to Feet

1 AU = 490806662401.57477 ft

1 Astronomical Unit (AU) = 490806662401.57477 Feets (ft)

1 Astronomicalunit equals 490806662401.57477 feets.

Astronomical Unit to Centimeter

1 AU = 14959787070000 cm

1 Astronomical Unit (AU) = 14959787070000 Centimeters (cm)

1 Astronomicalunit equals 14959787070000 centimeters.

Astronomical Unit to Meter

1 AU = 149597870700 m

1 Astronomical Unit (AU) = 149597870700 Meters (m)

1 Astronomicalunit equals 149597870700 meters.

Astronomical Unit to Kilometer

1 AU = 149597870.7 km

1 Astronomical Unit (AU) = 149597870.7 Kilometers (km)

1 Astronomicalunit equals 149597870.7 kilometers.

Astronomical Unit to Millimeter

1 AU = 149597870700000 mm

1 Astronomical Unit (AU) = 149597870700000 Millimeters (mm)

1 Astronomicalunit equals 149597870700000 millimeters.

Astronomical Unit to Yard

1 AU = 163602220800.52493 yd

1 Astronomical Unit (AU) = 163602220800.52493 Yards (yd)

1 Astronomicalunit equals 163602220800.52493 yards.

Astronomical Unit to Yoctometer

1 AU = 1.4959787070000001e+35 ym

1 Astronomical Unit (AU) = 1.4959787070000001e+35 Yoctometers (ym)

1 Astronomicalunit equals 1.4959787070000001e+35 yoctometers.

Astronomical Unit to Zeptometer

1 AU = 1.4959787070000001e+32 zm

1 Astronomical Unit (AU) = 1.4959787070000001e+32 Zeptometers (zm)

1 Astronomicalunit equals 1.4959787070000001e+32 zeptometers.

Astronomical Unit to Attometer

1 AU = 1.4959787069999999e+29 am

1 Astronomical Unit (AU) = 1.4959787069999999e+29 Attometers (am)

1 Astronomicalunit equals 1.4959787069999999e+29 attometers.

Astronomical Unit to Femtometer

1 AU = 1.4959787069999998e+26 fm

1 Astronomical Unit (AU) = 1.4959787069999998e+26 Femtometers (fm)

1 Astronomicalunit equals 1.4959787069999998e+26 femtometers.

Astronomical Unit to Picometer

1 AU = 1.495978707e+23 pm

1 Astronomical Unit (AU) = 1.495978707e+23 Picometers (pm)

1 Astronomicalunit equals 1.495978707e+23 picometers.

Astronomical Unit to Nanometer

1 AU = 149597870700000000000 nm

1 Astronomical Unit (AU) = 149597870700000000000 Nanometers (nm)

1 Astronomicalunit equals 149597870700000000000 nanometers.

Astronomical Unit to Micrometer

1 AU = 149597870700000000 µm

1 Astronomical Unit (AU) = 149597870700000000 Micrometers (µm)

1 Astronomicalunit equals 149597870700000000 micrometers.

Astronomical Unit to Decimeter

1 AU = 1495978707000 dm

1 Astronomical Unit (AU) = 1495978707000 Decimeters (dm)

1 Astronomicalunit equals 1495978707000 decimeters.

Astronomical Unit to Decameter

1 AU = 14959787070 dam

1 Astronomical Unit (AU) = 14959787070 Decameters (dam)

1 Astronomicalunit equals 14959787070 decameters.

Astronomical Unit to Hectometer

1 AU = 1495978707 hm

1 Astronomical Unit (AU) = 1495978707 Hectometers (hm)

1 Astronomicalunit equals 1495978707 hectometers.

Astronomical Unit to Megameter

1 AU = 149597.8707 Mm

1 Astronomical Unit (AU) = 149597.8707 Megameters (Mm)

1 Astronomicalunit equals 149597.8707 megameters.

Astronomical Unit to Gigameter

1 AU = 149.5978707 Gm

1 Astronomical Unit (AU) = 149.5978707 Gigameters (Gm)

1 Astronomicalunit equals 149.5978707 gigameters.

Astronomical Unit to Terameter

1 AU = 0.1495978707 Tm

1 Astronomical Unit (AU) = 0.1495978707 Terameter (Tm)

1 Astronomicalunit equals 0.1495978707 terameter.

Astronomical Unit to Petameter

1 AU = 0.0001495978707 Pm

1 Astronomical Unit (AU) = 0.0001495978707 Petameter (Pm)

1 Astronomicalunit equals 0.0001495978707 petameter.

Astronomical Unit to Exameter

1 AU = 1.495978707e-7 Em

1 Astronomical Unit (AU) = 1.495978707e-7 Exameter (Em)

1 Astronomicalunit equals 1.495978707e-7 exameter.

Astronomical Unit to Zettameter

1 AU = 1.495978707e-10 Zm

1 Astronomical Unit (AU) = 1.495978707e-10 Zettameter (Zm)

1 Astronomicalunit equals 1.495978707e-10 zettameter.

Astronomical Unit to Yottameter

1 AU = 1.495978707e-13 Ym

1 Astronomical Unit (AU) = 1.495978707e-13 Yottameter (Ym)

1 Astronomicalunit equals 1.495978707e-13 yottameter.

Astronomical Unit to Cubit

1 AU = 327204441601.04987 cubit

1 Astronomical Unit (AU) = 327204441601.04987 Cubits (cubit)

1 Astronomicalunit equals 327204441601.04987 cubits.

Astronomical Unit to Span

1 AU = 654408883202.0997 span

1 Astronomical Unit (AU) = 654408883202.0997 Spans (span)

1 Astronomicalunit equals 654408883202.0997 spans.

Astronomical Unit to Hand

1 AU = 1472419987204.7244 hh

1 Astronomical Unit (AU) = 1472419987204.7244 Hands (hh)

1 Astronomicalunit equals 1472419987204.7244 hands.

Astronomical Unit to Palm

1 AU = 1963226649606.299 palm

1 Astronomical Unit (AU) = 1963226649606.299 Palms (palm)

1 Astronomicalunit equals 1963226649606.299 palms.

Astronomical Unit to Digit

1 AU = 7852906598425.196 digit

1 Astronomical Unit (AU) = 7852906598425.196 Digits (digit)

1 Astronomicalunit equals 7852906598425.196 digits.

Astronomical Unit to Link

1 AU = 743646458184.2042 link

1 Astronomical Unit (AU) = 743646458184.2042 Links (link)

1 Astronomicalunit equals 743646458184.2042 links.

Astronomical Unit to Ell

1 AU = 130881776640.41995 ell

1 Astronomical Unit (AU) = 130881776640.41995 Ells (ell)

1 Astronomicalunit equals 130881776640.41995 ells.

Astronomical Unit to Barleycorn

1 AU = 17662086269185.36 barleycorn

1 Astronomical Unit (AU) = 17662086269185.36 Barleycorns (barleycorn)

1 Astronomicalunit equals 17662086269185.36 barleycorns.

Astronomical Unit to Light-Second

1 AU = 499.00478383615643 ls

1 Astronomical Unit (AU) = 499.00478383615643 Light-Seconds (ls)

1 Astronomicalunit equals 499.00478383615643 Light-Seconds.

Astronomical Unit to Light-Minute

1 AU = 8.316746397269274 lm

1 Astronomical Unit (AU) = 8.316746397269274 Light-Minutes (lm)

1 Astronomicalunit equals 8.316746397269274 Light-Minutes.

Astronomical Unit to Light-Hour

1 AU = 0.13861243992880115 lh

1 Astronomical Unit (AU) = 0.13861243992880115 Light-Hour (lh)

1 Astronomicalunit equals 0.13861243992880115 Light-Hour.

Astronomical Unit to Light-Day

1 AU = 0.005775518331704566 ld

1 Astronomical Unit (AU) = 0.005775518331704566 Light-Day (ld)

1 Astronomicalunit equals 0.005775518331704566 Light-Day.

Astronomical Unit to Light-Year

1 AU = 0.00001581250740982066 ly

1 Astronomical Unit (AU) = 0.00001581250740982066 Light-Year (ly)

1 Astronomicalunit equals 0.00001581250740982066 Light-Year.

Astronomical Unit to Parsec

1 AU = 0.000004848136811095356 pc

1 Astronomical Unit (AU) = 0.000004848136811095356 Parsec (pc)

1 Astronomicalunit equals 0.000004848136811095356 Parsec.

Astronomical Unit to Kiloparsec

1 AU = 4.848136811095355e-9 kpc

1 Astronomical Unit (AU) = 4.848136811095355e-9 Kiloparsec (kpc)

1 Astronomicalunit equals 4.848136811095355e-9 Kiloparsec.

Astronomical Unit to Megaparsec

1 AU = 4.848136811095356e-12 Mpc

1 Astronomical Unit (AU) = 4.848136811095356e-12 Megaparsec (Mpc)

1 Astronomicalunit equals 4.848136811095356e-12 Megaparsec.

Astronomical Unit to Gigaparsec

1 AU = 4.848136811095356e-15 Gpc

1 Astronomical Unit (AU) = 4.848136811095356e-15 Gigaparsec (Gpc)

1 Astronomicalunit equals 4.848136811095356e-15 Gigaparsec.

Astronomical Unit to Nautical Mile

1 AU = 80776388.06695464 NM

1 Astronomical Unit (AU) = 80776388.06695464 Nautical Miles (NM)

1 Astronomicalunit equals 80776388.06695464 Nautical Miles.

Astronomical Unit to Fathom

1 AU = 81801110400.26247 ftm

1 Astronomical Unit (AU) = 81801110400.26247 Fathoms (ftm)

1 Astronomicalunit equals 81801110400.26247 fathoms.

Astronomical Unit to Cable Length

1 AU = 681675920.0021873 cable

1 Astronomical Unit (AU) = 681675920.0021873 Cable Lengths (cable)

1 Astronomicalunit equals 681675920.0021873 Cable Length s.

Astronomical Unit to Nautical League

1 AU = 26925462.688984882 NL

1 Astronomical Unit (AU) = 26925462.688984882 Nautical Leagues (NL)

1 Astronomicalunit equals 26925462.688984882 Nautical Leagues.

Astronomical Unit to Thou

1 AU = 5889679948818897 mil

1 Astronomical Unit (AU) = 5889679948818897 Thous (mil)

1 Astronomicalunit equals 5889679948818897 thous.

Astronomical Unit to Rod

1 AU = 29745858327.368168 rd

1 Astronomical Unit (AU) = 29745858327.368168 Rods (rd)

1 Astronomicalunit equals 29745858327.368168 rods.

Astronomical Unit to Chain

1 AU = 7436464581.842042 ch

1 Astronomical Unit (AU) = 7436464581.842042 Chains (ch)

1 Astronomicalunit equals 7436464581.842042 chains.

Astronomical Unit to Furlong

1 AU = 743646458.1842042 fur

1 Astronomical Unit (AU) = 743646458.1842042 Furlongs (fur)

1 Astronomicalunit equals 743646458.1842042 furlongs.

Astronomical Unit to Mile

1 AU = 92955807.27302553 mi

1 Astronomical Unit (AU) = 92955807.27302553 Miles (mi)

1 Astronomicalunit equals 92955807.27302553 miles.

Astronomical Unit to League

1 AU = 30985269.09100851 lea

1 Astronomical Unit (AU) = 30985269.09100851 Leagues (lea)

1 Astronomicalunit equals 30985269.09100851 leagues.