1 astronomical units = 499.0047838 light-seconds 

Astronomical units to Light-seconds Conversion

Astronomical unit to light-second conversion allow you make a conversion between astronomical unit and light-second easily. You can find the tool in the following.

Length Conversion


= 499.00478384
= 4.99005 × 102
= 4.99005E2
= 4.99005e2
= 748.50717575
= 7.48507 × 102
= 7.48507E2
= 7.48507e2
= 998.00956767
= 9.9801 × 102
= 9.9801E2
= 9.9801e2
= 1,247.51195959
= 12.4751 × 102
= 12.4751E2
= 12.4751e2
= 1,497.01435151
= 14.9701 × 102
= 14.9701E2
= 14.9701e2

Quick Look: astronomical units to light-seconds

astronomical unit1 AU2 AU3 AU4 AU5 AU6 AU7 AU8 AU9 AU10 AU11 AU12 AU13 AU14 AU15 AU16 AU17 AU18 AU19 AU20 AU21 AU22 AU23 AU24 AU25 AU26 AU27 AU28 AU29 AU30 AU31 AU32 AU33 AU34 AU35 AU36 AU37 AU38 AU39 AU40 AU41 AU42 AU43 AU44 AU45 AU46 AU47 AU48 AU49 AU50 AU51 AU52 AU53 AU54 AU55 AU56 AU57 AU58 AU59 AU60 AU61 AU62 AU63 AU64 AU65 AU66 AU67 AU68 AU69 AU70 AU71 AU72 AU73 AU74 AU75 AU76 AU77 AU78 AU79 AU80 AU81 AU82 AU83 AU84 AU85 AU86 AU87 AU88 AU89 AU90 AU91 AU92 AU93 AU94 AU95 AU96 AU97 AU98 AU99 AU100 AU
light-second499.0047838 light-second998.0095677 light-second1,497.0143515 light-second1,996.0191353 light-second2,495.0239192 light-second2,994.0287030 light-second3,493.0334869 light-second3,992.0382707 light-second4,491.0430545 light-second4,990.0478384 light-second5,489.0526222 light-second5,988.0574060 light-second6,487.0621899 light-second6,986.0669737 light-second7,485.0717575 light-second7,984.0765414 light-second8,483.0813252 light-second8,982.0861091 light-second9,481.0908929 light-second9,980.0956767 light-second10,479.1004606 light-second10,978.1052444 light-second11,477.1100282 light-second11,976.1148121 light-second12,475.1195959 light-second12,974.1243797 light-second13,473.1291636 light-second13,972.1339474 light-second14,471.1387312 light-second14,970.1435151 light-second15,469.1482989 light-second15,968.1530828 light-second16,467.1578666 light-second16,966.1626504 light-second17,465.1674343 light-second17,964.1722181 light-second18,463.1770019 light-second18,962.1817858 light-second19,461.1865696 light-second19,960.1913534 light-second20,459.1961373 light-second20,958.2009211 light-second21,457.2057050 light-second21,956.2104888 light-second22,455.2152726 light-second22,954.2200565 light-second23,453.2248403 light-second23,952.2296241 light-second24,451.2344080 light-second24,950.2391918 light-second25,449.2439756 light-second25,948.2487595 light-second26,447.2535433 light-second26,946.2583272 light-second27,445.2631110 light-second27,944.2678948 light-second28,443.2726787 light-second28,942.2774625 light-second29,441.2822463 light-second29,940.2870302 light-second30,439.2918140 light-second30,938.2965978 light-second31,437.3013817 light-second31,936.3061655 light-second32,435.3109494 light-second32,934.3157332 light-second33,433.3205170 light-second33,932.3253009 light-second34,431.3300847 light-second34,930.3348685 light-second35,429.3396524 light-second35,928.3444362 light-second36,427.3492200 light-second36,926.3540039 light-second37,425.3587877 light-second37,924.3635715 light-second38,423.3683554 light-second38,922.3731392 light-second39,421.3779231 light-second39,920.3827069 light-second40,419.3874907 light-second40,918.3922746 light-second41,417.3970584 light-second41,916.4018422 light-second42,415.4066261 light-second42,914.4114099 light-second43,413.4161937 light-second43,912.4209776 light-second44,411.4257614 light-second44,910.4305453 light-second45,409.4353291 light-second45,908.4401129 light-second46,407.4448968 light-second46,906.4496806 light-second47,405.4544644 light-second47,904.4592483 light-second48,403.4640321 light-second48,902.4688159 light-second49,401.4735998 light-second49,900.4783836 light-second

The astronomical unit (symbol: au or ua) is a unit of length, roughly the distance from Earth to the Sun. However, that distance varies as Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally conceived as the average of Earth's aphelion and perihelion, it is now defined as exactly 149 597 870 700 metres (about 150 million kilometres, or 93 million miles). The astronomical unit is used primarily as a convenient yardstick for measuring distances within the Solar System or around other stars. However, it is also a fundamental component in the definition of another unit of astronomical length, the parsec.

Name of unitSymbolDefinitionRelation to SI unitsUnit System
astronomical unitAU

≡ 149 597 870 700 m ≈ Distance from Earth to Sun

≡ 149 597 870 700 m

Science - Astronomy (Length)

conversion table

astronomical unitslight-secondsastronomical unitslight-seconds
1≡ 499.004783836164≡ 1996.0191353446
1.5≡ 748.507175754234.5≡ 2245.5215272627
2≡ 998.009567672315≡ 2495.0239191808
2.5≡ 1247.51195959045.5≡ 2744.5263110989
3≡ 1497.01435150856≡ 2994.0287030169

The light-second is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space in onesecond, and is equal to exactly 299792458 metres (just over 186282 miles).

Name of unitSymbolDefinitionRelation to SI unitsUnit System

≡ Distance light travels in one second in vacuum

≡ 299 792 458 m

Science - Astronomy (Length)

conversion table

light-secondsastronomical unitslight-secondsastronomical units
1≡ 0.00200398880414≡ 0.0080159552164
1.5≡ 0.003005983206154.5≡ 0.00901794961845
2≡ 0.00400797760825≡ 0.0100199440205
2.5≡ 0.005009972010255.5≡ 0.01102193842255
3≡ 0.00601196641236≡ 0.0120239328246

Conversion table

astronomical unitslight-seconds
1≡ 499.0047838
0.0020040≡ 1


exactly equal
approximately equal to
=equal to
digitsindicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …)