Astronomical Units to Kilometers (au → km)
Formula
1 au = 149600000 kmConversion Table
| au | km |
|---|---|
| 0 | 0 |
| 1.0000 | 149,600,000 |
| 2.0000 | 299,200,000 |
| 3.0000 | 448,800,000 |
| 4.0000 | 598,400,000 |
| 5.0000 | 748,000,000 |
| 6.0000 | 897,600,000 |
| 7.0000 | 1,047,200,000 |
| 8.0000 | 1,196,800,000 |
| 9.0000 | 1,346,400,000 |
| 10.000 | 1,496,000,000 |
| 11.000 | 1,645,600,000 |
| 12.000 | 1,795,200,000 |
| 13.000 | 1,944,800,000 |
| 14.000 | 2,094,400,000 |
| 15.000 | 2,244,000,000 |
| 16.000 | 2,393,600,000 |
| 17.000 | 2,543,200,000 |
| 18.000 | 2,692,800,000 |
| 19.000 | 2,842,400,000 |
| au | km |
|---|---|
| 20.000 | 2,992,000,000 |
| 21.000 | 3,141,600,000 |
| 22.000 | 3,291,200,000 |
| 23.000 | 3,440,800,000 |
| 24.000 | 3,590,400,000 |
| 25.000 | 3,740,000,000 |
| 26.000 | 3,889,600,000 |
| 27.000 | 4,039,200,000 |
| 28.000 | 4,188,800,000 |
| 29.000 | 4,338,400,000 |
| 30.000 | 4,488,000,000 |
| 31.000 | 4,637,600,000 |
| 32.000 | 4,787,200,000 |
| 33.000 | 4,936,800,000 |
| 34.000 | 5,086,400,000 |
| 35.000 | 5,236,000,000 |
| 36.000 | 5,385,600,000 |
| 37.000 | 5,535,200,000 |
| 38.000 | 5,684,800,000 |
| 39.000 | 5,834,400,000 |
| au | km |
|---|---|
| 40.000 | 5,984,000,000 |
| 41.000 | 6,133,600,000 |
| 42.000 | 6,283,200,000 |
| 43.000 | 6,432,800,000 |
| 44.000 | 6,582,400,000 |
| 45.000 | 6,732,000,000 |
| 46.000 | 6,881,600,000 |
| 47.000 | 7,031,200,000 |
| 48.000 | 7,180,800,000 |
| 49.000 | 7,330,400,000 |
| 50.000 | 7,480,000,000 |
| 51.000 | 7,629,600,000 |
| 52.000 | 7,779,200,000 |
| 53.000 | 7,928,800,000 |
| 54.000 | 8,078,400,000 |
| 55.000 | 8,228,000,000 |
| 56.000 | 8,377,600,000 |
| 57.000 | 8,527,200,000 |
| 58.000 | 8,676,800,000 |
| 59.000 | 8,826,400,000 |
| au | km |
|---|---|
| 60.000 | 8,976,000,000 |
| 61.000 | 9,125,600,000 |
| 62.000 | 9,275,200,000 |
| 63.000 | 9,424,800,000 |
| 64.000 | 9,574,400,000 |
| 65.000 | 9,724,000,000 |
| 66.000 | 9,873,600,000 |
| 67.000 | 10,023,000,000 |
| 68.000 | 10,173,000,000 |
| 69.000 | 10,322,000,000 |
| 70.000 | 10,472,000,000 |
| 71.000 | 10,622,000,000 |
| 72.000 | 10,771,000,000 |
| 73.000 | 10,921,000,000 |
| 74.000 | 11,070,000,000 |
| 75.000 | 11,220,000,000 |
| 76.000 | 11,370,000,000 |
| 77.000 | 11,519,000,000 |
| 78.000 | 11,669,000,000 |
| 79.000 | 11,818,000,000 |
Astronomical Units to Kilometers Conversion
Converting Astronomical Units (au) to Kilometers (km) is a common length conversion. 1 au equals 149,600,000 km. For example, 100 au is equal to 14,960,000,000 km.
Quick Mental Math: Astronomical Units to Kilometers
Reference a linear anchor between astronomical units and kilometers; use one memorable value.
Why is converting Astronomical Units to Kilometers tricky?
Magnitude or direction confusion between astronomical-units and kilometers is the primary error source.
Quick Reference Values
1 au = 149,600,000 km. 5 au = 748,000,000 km. 10 au = 1,496,000,000 km. 25 au = 3,740,000,000 km. 50 au = 7,480,000,000 km. 100 au = 14,960,000,000 km.
What is Astronomical Units?
Astronomical Units (au) is a unit of length. An astronomical unit (au) is defined as exactly 149,597,870.7 kilometers. It represents the average distance from Earth to the Sun and is used as a standard measure for distances within the solar system [cgpm-resolutions]. The astronomical unit was formally defined by the International Astronomical Union in 2012 to replace earlier approximations and improve measurement precision in celestial mechanics [cgpm-resolutions]. The au is the standard unit of length in astronomy for expressing distances between planets and other solar system bodies. It is used globally by space agencies such as NASA and ESA [nist-cuu].
What is Kilometers?
Kilometers (km) is a unit of length. The kilometer is a metric unit of length equal to 1,000 meters. It is used as a standard measure for distances in the SI system, where one meter is defined by the speed of light in vacuum. The kilometer facilitates expressing larger distances conveniently [bipm-si-brochure]. The kilometer was established in France during the metric system's creation in the late 18th century as 1,000 meters. It was adopted internationally to provide a uniform length measurement for land distances and mapping [bipm-si-brochure]. Kilometers are widely used globally for road distances, geography, and transportation metrics. Countries including Canada, Australia, and most of Europe use kilometers for speed limits and distance signs, following SI conventions [nist-si-guide].
Common Misspellings
People often search for this conversion using these alternate spellings: astronomical unit, au unit, astronomic unit, astronomical unites, kilometres, kilomiter, kilometerss, kilomters. All of these refer to the Astronomical Units to Kilometers conversion.