1 astronomical units = 0.0057755 light-days 

Astronomical units to Light-days Conversion

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

Length Conversion


= 0.00577552
= 577552 × 10-8
= 577552E-8
= 577552e-8
= 0.00866328
= 866328 × 10-8
= 866328E-8
= 866328e-8
= 0.01155104
= 11551 × 10-6
= 11551E-6
= 11551e-6
= 0.01443880
= 144388 × 10-7
= 144388E-7
= 144388e-7
= 0.01732655
= 173266 × 10-7
= 173266E-7
= 173266e-7

Quick Look: astronomical units to light-days

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-day0.0057755 ly0.0115510 ly0.0173266 ly0.0231021 ly0.0288776 ly0.0346531 ly0.0404286 ly0.0462041 ly0.0519797 ly0.0577552 ly0.0635307 ly0.0693062 ly0.0750817 ly0.0808573 ly0.0866328 ly0.0924083 ly0.0981838 ly0.1039593 ly0.1097348 ly0.1155104 ly0.1212859 ly0.1270614 ly0.1328369 ly0.1386124 ly0.1443880 ly0.1501635 ly0.1559390 ly0.1617145 ly0.1674900 ly0.1732655 ly0.1790411 ly0.1848166 ly0.1905921 ly0.1963676 ly0.2021431 ly0.2079187 ly0.2136942 ly0.2194697 ly0.2252452 ly0.2310207 ly0.2367963 ly0.2425718 ly0.2483473 ly0.2541228 ly0.2598983 ly0.2656738 ly0.2714494 ly0.2772249 ly0.2830004 ly0.2887759 ly0.2945514 ly0.3003270 ly0.3061025 ly0.3118780 ly0.3176535 ly0.3234290 ly0.3292045 ly0.3349801 ly0.3407556 ly0.3465311 ly0.3523066 ly0.3580821 ly0.3638577 ly0.3696332 ly0.3754087 ly0.3811842 ly0.3869597 ly0.3927352 ly0.3985108 ly0.4042863 ly0.4100618 ly0.4158373 ly0.4216128 ly0.4273884 ly0.4331639 ly0.4389394 ly0.4447149 ly0.4504904 ly0.4562659 ly0.4620415 ly0.4678170 ly0.4735925 ly0.4793680 ly0.4851435 ly0.4909191 ly0.4966946 ly0.5024701 ly0.5082456 ly0.5140211 ly0.5197966 ly0.5255722 ly0.5313477 ly0.5371232 ly0.5428987 ly0.5486742 ly0.5544498 ly0.5602253 ly0.5660008 ly0.5717763 ly0.5775518 ly

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-daysastronomical unitslight-days
1≡ 0.0057755183314374≡ 0.023102073325748
1.5≡ 0.00866327749715554.5≡ 0.025989832491466
2≡ 0.0115510366628745≡ 0.028877591657185
2.5≡ 0.0144387958285925.5≡ 0.031765350822903
3≡ 0.0173265549943116≡ 0.034653109988622

The light-day 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 oneday, and is equal to exactly 2.59020683712×1013 metres.

Name of unitSymbolDefinitionRelation to SI unitsUnit System

≡ 24 light-hours

≡ 2.59020683712×1013 m

Science - Astronomy (Length)

conversion table

light-daysastronomical unitslight-daysastronomical units
1≡ 173.144632674244≡ 692.57853069696
1.5≡ 259.716949011364.5≡ 779.15084703408
2≡ 346.289265348485≡ 865.7231633712
2.5≡ 432.86158168565.5≡ 952.29547970832
3≡ 519.433898022726≡ 1038.8677960454

Conversion table

astronomical unitslight-days
1≡ 0.0057755
173.1446327≡ 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 …)