Online Length Units Converter
How to Convert from Kilometer [km] to Astronomical unit [AU, UA]?

How to Convert from Kilometer [km] to Astronomical unit [AU, UA]?

Convert distances from kilometers to astronomical units (AU) using this online converter. Understand the units, usage, and practical applications in astronomy and space science.

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Kilometer [km] to Astronomical unit [AU, UA] Conversion Table

Kilometer [km] Astronomical unit [AU, UA]

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.
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Kilometer [km] to Astronomical unit [AU, UA] Conversion Table
Kilometer [km] Astronomical unit [AU, UA]

Explore More Length Units Converter

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  5. How to convert from centimeter [cm] to kilometer [km]?
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  7. How to convert from millimeter [mm] to kilometer [km]?
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  11. How to convert from nanometer [nm] to kilometer [km]?
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  13. How to convert from mile [mi, mi(Int)] to kilometer [km]?
  14. How to convert from kilometer [km] to mile [mi, mi(Int)]?
  15. How to convert from yard [yd] to kilometer [km]?
  16. How to convert from kilometer [km] to yard [yd]?
  17. How to convert from foot [ft] to kilometer [km]?
  18. How to convert from kilometer [km] to foot [ft]?
  19. How to convert from inch [in] to kilometer [km]?
  20. How to convert from kilometer [km] to inch [in]?
  21. How to convert from light year [ly] to kilometer [km]?
  22. How to convert from kilometer [km] to light year [ly]?
  23. How to convert from exameter [Em] to kilometer [km]?
  24. How to convert from kilometer [km] to exameter [Em]?
  25. How to convert from petameter [Pm] to kilometer [km]?
  26. How to convert from kilometer [km] to petameter [Pm]?
  27. How to convert from terameter [Tm] to kilometer [km]?
  28. How to convert from kilometer [km] to terameter [Tm]?
  29. How to convert from gigameter [Gm] to kilometer [km]?
  30. How to convert from kilometer [km] to gigameter [Gm]?
  31. How to convert from megameter [Mm] to kilometer [km]?
  32. How to convert from kilometer [km] to megameter [Mm]?
  33. How to convert from hectometer [hm] to kilometer [km]?
  34. How to convert from kilometer [km] to hectometer [hm]?
  35. How to convert from dekameter [dam] to kilometer [km]?
  36. How to convert from kilometer [km] to dekameter [dam]?
  37. How to convert from micron [µ] to kilometer [km]?
  38. How to convert from kilometer [km] to micron [µ]?
  39. How to convert from picometer [pm] to kilometer [km]?
  40. How to convert from kilometer [km] to picometer [pm]?
  41. How to convert from femtometer [fm] to kilometer [km]?
  42. How to convert from kilometer [km] to femtometer [fm]?
  43. How to convert from attometer [am] to kilometer [km]?
  44. How to convert from kilometer [km] to attometer [am]?
  45. How to convert from megaparsec [Mpc] to kilometer [km]?
  46. How to convert from kilometer [km] to megaparsec [Mpc]?
  47. How to convert from kiloparsec [kpc] to kilometer [km]?
  48. How to convert from kilometer [km] to kiloparsec [kpc]?
  49. How to convert from parsec [pc] to kilometer [km]?
  50. How to convert from kilometer [km] to parsec [pc]?
  51. How to convert from astronomical unit [AU, UA] to kilometer [km]?
  52. How to convert from kilometer [km] to astronomical unit [AU, UA]?
  53. How to convert from league [lea] to kilometer [km]?
  54. How to convert from kilometer [km] to league [lea]?
  55. How to convert from nautical league (UK) to kilometer [km]?
  56. How to convert from kilometer [km] to nautical league (UK)?
  57. How to convert from nautical league (int.) to kilometer [km]?
  58. How to convert from kilometer [km] to nautical league (int.)?
  59. How to convert from league (statute) [st.league] to kilometer [km]?
  60. How to convert from kilometer [km] to league (statute) [st.league]?
  61. How to convert from nautical mile (UK) [NM (UK)] to kilometer [km]?
  62. How to convert from kilometer [km] to nautical mile (UK) [NM (UK)]?
  63. How to convert from nautical mile (international) to kilometer [km]?
  64. How to convert from kilometer [km] to nautical mile (international)?
  65. How to convert from mile (statute) [mi, mi (US)] to kilometer [km]?
  66. How to convert from kilometer [km] to mile (statute) [mi, mi (US)]?
  67. How to convert from mile (US survey) [mi] to kilometer [km]?
  68. How to convert from kilometer [km] to mile (US survey) [mi]?
  69. How to convert from mile (Roman) to kilometer [km]?
  70. How to convert from kilometer [km] to mile (Roman)?
  71. How to convert from kiloyard [kyd] to kilometer [km]?
  72. How to convert from kilometer [km] to kiloyard [kyd]?
  73. How to convert from furlong [fur] to kilometer [km]?
  74. How to convert from kilometer [km] to furlong [fur]?
  75. How to convert from furlong (US survey) [fur] to kilometer [km]?
  76. How to convert from kilometer [km] to furlong (US survey) [fur]?
  77. How to convert from chain [ch] to kilometer [km]?
  78. How to convert from kilometer [km] to chain [ch]?
  79. How to convert from chain (US survey) [ch] to kilometer [km]?
  80. How to convert from kilometer [km] to chain (US survey) [ch]?
  81. How to convert from rope to kilometer [km]?
  82. How to convert from kilometer [km] to rope?
  83. How to convert from rod [rd] to kilometer [km]?
  84. How to convert from kilometer [km] to rod [rd]?
  85. How to convert from rod (US survey) [rd] to kilometer [km]?
  86. How to convert from kilometer [km] to rod (US survey) [rd]?
  87. How to convert from perch to kilometer [km]?
  88. How to convert from kilometer [km] to perch?
  89. How to convert from pole to kilometer [km]?
  90. How to convert from kilometer [km] to pole?
  91. How to convert from fathom [fath] to kilometer [km]?
  92. How to convert from kilometer [km] to fathom [fath]?
  93. How to convert from fathom (US survey) [fath] to kilometer [km]?
  94. How to convert from kilometer [km] to fathom (US survey) [fath]?
  95. How to convert from ell to kilometer [km]?
  96. How to convert from kilometer [km] to ell?
  97. How to convert from foot (US survey) [ft] to kilometer [km]?
  98. How to convert from kilometer [km] to foot (US survey) [ft]?
  99. How to convert from link [li] to kilometer [km]?
  100. How to convert from kilometer [km] to link [li]?
  101. How to convert from link (US survey) [li] to kilometer [km]?
  102. How to convert from kilometer [km] to link (US survey) [li]?
  103. How to convert from cubit (UK) to kilometer [km]?
  104. How to convert from kilometer [km] to cubit (UK)?
  105. How to convert from hand to kilometer [km]?
  106. How to convert from kilometer [km] to hand?
  107. How to convert from span (cloth) to kilometer [km]?
  108. How to convert from kilometer [km] to span (cloth)?
  109. How to convert from finger (cloth) to kilometer [km]?
  110. How to convert from kilometer [km] to finger (cloth)?
  111. How to convert from nail (cloth) to kilometer [km]?
  112. How to convert from kilometer [km] to nail (cloth)?
  113. How to convert from inch (US survey) [in] to kilometer [km]?
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  115. How to convert from barleycorn to kilometer [km]?
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  119. How to convert from microinch to kilometer [km]?
  120. How to convert from kilometer [km] to microinch?
  121. How to convert from angstrom [A] to kilometer [km]?
  122. How to convert from kilometer [km] to angstrom [A]?
  123. How to convert from a.u. of length [a.u., b] to kilometer [km]?
  124. How to convert from kilometer [km] to a.u. of length [a.u., b]?
  125. How to convert from X-unit [X] to kilometer [km]?
  126. How to convert from kilometer [km] to X-unit [X]?
  127. How to convert from fermi [F, f] to kilometer [km]?
  128. How to convert from kilometer [km] to fermi [F, f]?
  129. How to convert from arpent to kilometer [km]?
  130. How to convert from kilometer [km] to arpent?
  131. How to convert from pica to kilometer [km]?
  132. How to convert from kilometer [km] to pica?
  133. How to convert from point to kilometer [km]?
  134. How to convert from kilometer [km] to point?
  135. How to convert from twip to kilometer [km]?
  136. How to convert from kilometer [km] to twip?
  137. How to convert from aln to kilometer [km]?
  138. How to convert from kilometer [km] to aln?
  139. How to convert from famn to kilometer [km]?
  140. How to convert from kilometer [km] to famn?
  141. How to convert from caliber [cl] to kilometer [km]?
  142. How to convert from kilometer [km] to caliber [cl]?
  143. How to convert from centiinch [cin] to kilometer [km]?
  144. How to convert from kilometer [km] to centiinch [cin]?
  145. How to convert from ken to kilometer [km]?
  146. How to convert from kilometer [km] to ken?
  147. How to convert from Russian archin to kilometer [km]?
  148. How to convert from kilometer [km] to Russian archin?
  149. How to convert from Roman actus to kilometer [km]?
  150. How to convert from kilometer [km] to Roman actus?
  151. How to convert from vara de tarea to kilometer [km]?
  152. How to convert from kilometer [km] to vara de tarea?
  153. How to convert from vara conuquera to kilometer [km]?
  154. How to convert from kilometer [km] to vara conuquera?
  155. How to convert from vara castellana to kilometer [km]?
  156. How to convert from kilometer [km] to vara castellana?
  157. How to convert from cubit (Greek) to kilometer [km]?
  158. How to convert from kilometer [km] to cubit (Greek)?
  159. How to convert from long reed to kilometer [km]?
  160. How to convert from kilometer [km] to long reed?
  161. How to convert from reed to kilometer [km]?
  162. How to convert from kilometer [km] to reed?
  163. How to convert from long cubit to kilometer [km]?
  164. How to convert from kilometer [km] to long cubit?
  165. How to convert from handbreadth to kilometer [km]?
  166. How to convert from kilometer [km] to handbreadth?
  167. How to convert from fingerbreadth to kilometer [km]?
  168. How to convert from kilometer [km] to fingerbreadth?
  169. How to convert from Planck length to kilometer [km]?
  170. How to convert from kilometer [km] to Planck length?
  171. How to convert from Electron radius (classical) to kilometer [km]?
  172. How to convert from kilometer [km] to Electron radius (classical)?
  173. How to convert from Bohr radius [b, a.u.] to kilometer [km]?
  174. How to convert from kilometer [km] to Bohr radius [b, a.u.]?
  175. How to convert from Earth's equatorial radius to kilometer [km]?
  176. How to convert from kilometer [km] to Earth's equatorial radius?
  177. How to convert from Earth's polar radius to kilometer [km]?
  178. How to convert from kilometer [km] to Earth's polar radius?
  179. How to convert from Earth's distance from sun to kilometer [km]?
  180. How to convert from kilometer [km] to Earth's distance from sun?
  181. How to convert from Sun's radius to kilometer [km]?
  182. How to convert from kilometer [km] to Sun's radius?

What Is This Tool?

This converter allows you to change length measurements from kilometers to astronomical units (AU). Kilometers are commonly used for terrestrial distances, while astronomical units are ideal for expressing vast distances within the Solar System.

How to Use This Tool?

  • Enter the distance value in kilometers.
  • Select kilometers as the source unit and astronomical units as the target unit.
  • Click on convert to see the result in astronomical units.

Key Features

  • Converts kilometers to astronomical units precisely.
  • Suitable for astronomy, space mission planning, and astrophysics contexts.
  • Displays results using scientific notation for small values.
  • Browser-based and easy to use without requiring installation.

Examples

  • 1000 kilometers converts to approximately 6.6845871226706e-6 astronomical units.
  • 500,000 kilometers converts to about 0.0033422935613353 astronomical units.

Common Use Cases

  • Translating Earth-based distances into scales suitable for space and astronomy.
  • Planning spacecraft trajectories and missions within the Solar System.
  • Reporting and comparing planetary orbital distances and exoplanet separations.

Tips & Best Practices

  • Use the converter to easily handle very small decimal values typical in AU conversions.
  • Remember that kilometers are preferred for everyday terrestrial measurements.
  • Apply astronomical units when dealing with planetary and orbital distances for clarity.

Limitations

  • The astronomical unit’s exact length makes it less suitable for small or terrestrial distance measurements.
  • Conversion results often require scientific notation due to extremely small decimal values.
  • Not intended for measurements outside of astronomical or large-scale space contexts.

Frequently Asked Questions

Why convert kilometers to astronomical units?
Because astronomical units provide a convenient scale for expressing vast distances within the Solar System, where kilometers are impractical.

What contexts use astronomical units?
Astronomical units are used in astronomy, planetary science, space mission planning, and astrophysics to describe orbital sizes and distances.

Can I use astronomical units for everyday distances?
No, astronomical units are not suitable for very small or terrestrial distances, which are better expressed in kilometers.

Key Terminology

Kilometer [km]
An SI derived unit equal to 1,000 metres used for regional and geographic distance measurements.
Astronomical unit [AU, UA]
A unit of length equal to exactly 149,597,870,700 metres, commonly used to express distances within the Solar System.
Conversion rate
The factor used to convert kilometers to astronomical units: 1 km = 6.6845871226706e-9 AU.

Quick Knowledge Check

What is the kilometer unit primarily used for?
What is the exact length defined for an astronomical unit?
Which unit is more practical for expressing orbital distances of exoplanets?