light-year | 1 ly | 2 ly | 3 ly | 4 ly | 5 ly | 6 ly | 7 ly | 8 ly | 9 ly | 10 ly | 11 ly | 12 ly | 13 ly | 14 ly | 15 ly | 16 ly | 17 ly | 18 ly | 19 ly | 20 ly | 21 ly | 22 ly | 23 ly | 24 ly | 25 ly | 26 ly | 27 ly | 28 ly | 29 ly | 30 ly | 31 ly | 32 ly | 33 ly | 34 ly | 35 ly | 36 ly | 37 ly | 38 ly | 39 ly | 40 ly | 41 ly | 42 ly | 43 ly | 44 ly | 45 ly | 46 ly | 47 ly | 48 ly | 49 ly | 50 ly | 51 ly | 52 ly | 53 ly | 54 ly | 55 ly | 56 ly | 57 ly | 58 ly | 59 ly | 60 ly | 61 ly | 62 ly | 63 ly | 64 ly | 65 ly | 66 ly | 67 ly | 68 ly | 69 ly | 70 ly | 71 ly | 72 ly | 73 ly | 74 ly | 75 ly | 76 ly | 77 ly | 78 ly | 79 ly | 80 ly | 81 ly | 82 ly | 83 ly | 84 ly | 85 ly | 86 ly | 87 ly | 88 ly | 89 ly | 90 ly | 91 ly | 92 ly | 93 ly | 94 ly | 95 ly | 96 ly | 97 ly | 98 ly | 99 ly | 100 ly |
inch | 3.724617482236 × 1017 in | 7.449234964472 × 1017 in | 1.1173852446708 × 1018 in | 1.4898469928944 × 1018 in | 1.862308741118 × 1018 in | 2.2347704893416 × 1018 in | 2.6072322375652 × 1018 in | 2.9796939857888 × 1018 in | 3.3521557340124 × 1018 in | 3.724617482236 × 1018 in | 4.0970792304596 × 1018 in | 4.4695409786832 × 1018 in | 4.8420027269068 × 1018 in | 5.2144644751304 × 1018 in | 5.586926223354 × 1018 in | 5.9593879715776 × 1018 in | 6.3318497198012 × 1018 in | 6.7043114680248 × 1018 in | 7.0767732162484 × 1018 in | 7.449234964472 × 1018 in | 7.8216967126956 × 1018 in | 8.1941584609192 × 1018 in | 8.5666202091428 × 1018 in | 8.9390819573664 × 1018 in | 9.31154370559 × 1018 in | 9.6840054538136 × 1018 in | 1.0056467202037 × 1019 in | 1.0428928950261 × 1019 in | 1.0801390698484 × 1019 in | 1.1173852446708 × 1019 in | 1.1546314194932 × 1019 in | 1.1918775943155 × 1019 in | 1.2291237691379 × 1019 in | 1.2663699439602 × 1019 in | 1.3036161187826 × 1019 in | 1.340862293605 × 1019 in | 1.3781084684273 × 1019 in | 1.4153546432497 × 1019 in | 1.452600818072 × 1019 in | 1.4898469928944 × 1019 in | 1.5270931677168 × 1019 in | 1.5643393425391 × 1019 in | 1.6015855173615 × 1019 in | 1.6388316921838 × 1019 in | 1.6760778670062 × 1019 in | 1.7133240418286 × 1019 in | 1.7505702166509 × 1019 in | 1.7878163914733 × 1019 in | 1.8250625662956 × 1019 in | 1.862308741118 × 1019 in | 1.8995549159404 × 1019 in | 1.9368010907627 × 1019 in | 1.9740472655851 × 1019 in | 2.0112934404074 × 1019 in | 2.0485396152298 × 1019 in | 2.0857857900522 × 1019 in | 2.1230319648745 × 1019 in | 2.1602781396969 × 1019 in | 2.1975243145192 × 1019 in | 2.2347704893416 × 1019 in | 2.272016664164 × 1019 in | 2.3092628389863 × 1019 in | 2.3465090138087 × 1019 in | 2.383755188631 × 1019 in | 2.4210013634534 × 1019 in | 2.4582475382757 × 1019 in | 2.4954937130981 × 1019 in | 2.5327398879205 × 1019 in | 2.5699860627428 × 1019 in | 2.6072322375652 × 1019 in | 2.6444784123875 × 1019 in | 2.6817245872099 × 1019 in | 2.7189707620323 × 1019 in | 2.7562169368546 × 1019 in | 2.793463111677 × 1019 in | 2.8307092864993 × 1019 in | 2.8679554613217 × 1019 in | 2.9052016361441 × 1019 in | 2.9424478109664 × 1019 in | 2.9796939857888 × 1019 in | 3.0169401606111 × 1019 in | 3.0541863354335 × 1019 in | 3.0914325102559 × 1019 in | 3.1286786850782 × 1019 in | 3.1659248599006 × 1019 in | 3.2031710347229 × 1019 in | 3.2404172095453 × 1019 in | 3.2776633843677 × 1019 in | 3.31490955919 × 1019 in | 3.3521557340124 × 1019 in | 3.3894019088347 × 1019 in | 3.4266480836571 × 1019 in | 3.4638942584795 × 1019 in | 3.5011404333018 × 1019 in | 3.5383866081242 × 1019 in | 3.5756327829465 × 1019 in | 3.6128789577689 × 1019 in | 3.6501251325913 × 1019 in | 3.6873713074136 × 1019 in | 3.724617482236 × 1019 in |
The light-year is a unit of length used to express astronomical distances. It is about 9.5 quadrillion metres or 5.9 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days). Because it includes the word "year", the term light-year is sometimes misinterpreted as a unit of time.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
light-year | ly | ≡ Distance light travels in vacuum in 365.25 days | = 9.4607304725808×1015 m | Science - Astronomy (Length) |
light-years | inches | light-years | inches |
---|---|---|---|
1 | = 3.724617482236E+17 | 4 | = 1.4898469928944E+18 |
1.5 | = 5.586926223354E+17 | 4.5 | = 1.6760778670062E+18 |
2 | = 7.449234964472E+17 | 5 | = 1.862308741118E+18 |
2.5 | = 9.31154370559E+17 | 5.5 | = 2.0485396152298E+18 |
3 | = 1.1173852446708E+18 | 6 | = 2.2347704893416E+18 |
The inch (abbreviation: in or ″) is a unit of length in the (British) imperial and United States customary systems of measurement now formally equal to 1⁄36 yard but usually understood as 1⁄12 of a foot. Derived from the Roman uncia ("twelfth"), inch is also sometimes used to translate related units in other measurement systems, usually understood as deriving from the width of the human thumb.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
inch | in | ≡ 2.54 cm ≡ 1⁄36 yd ≡ 1⁄12 ft | ≡ 0.0254 m | Imperial/US |
inches | light-years | inches | light-years |
---|---|---|---|
1 | = 2.6848394627619E-18 | 4 | = 1.0739357851048E-17 |
1.5 | = 4.0272591941428E-18 | 4.5 | = 1.2081777582429E-17 |
2 | = 5.3696789255238E-18 | 5 | = 1.3424197313809E-17 |
2.5 | = 6.7120986569047E-18 | 5.5 | = 1.476661704519E-17 |
3 | = 8.0545183882857E-18 | 6 | = 1.6109036776571E-17 |
light-years | inches |
---|---|
1 | = 3.724617482236 × 1017 |
2.6848394627619 × 10-18 | = 1 |
Symbol | Definition |
---|---|
≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |