| mile (US Survey) | 1 mi (US) | 2 mi (US) | 3 mi (US) | 4 mi (US) | 5 mi (US) | 6 mi (US) | 7 mi (US) | 8 mi (US) | 9 mi (US) | 10 mi (US) | 11 mi (US) | 12 mi (US) | 13 mi (US) | 14 mi (US) | 15 mi (US) | 16 mi (US) | 17 mi (US) | 18 mi (US) | 19 mi (US) | 20 mi (US) | 21 mi (US) | 22 mi (US) | 23 mi (US) | 24 mi (US) | 25 mi (US) | 26 mi (US) | 27 mi (US) | 28 mi (US) | 29 mi (US) | 30 mi (US) | 31 mi (US) | 32 mi (US) | 33 mi (US) | 34 mi (US) | 35 mi (US) | 36 mi (US) | 37 mi (US) | 38 mi (US) | 39 mi (US) | 40 mi (US) | 41 mi (US) | 42 mi (US) | 43 mi (US) | 44 mi (US) | 45 mi (US) | 46 mi (US) | 47 mi (US) | 48 mi (US) | 49 mi (US) | 50 mi (US) | 51 mi (US) | 52 mi (US) | 53 mi (US) | 54 mi (US) | 55 mi (US) | 56 mi (US) | 57 mi (US) | 58 mi (US) | 59 mi (US) | 60 mi (US) | 61 mi (US) | 62 mi (US) | 63 mi (US) | 64 mi (US) | 65 mi (US) | 66 mi (US) | 67 mi (US) | 68 mi (US) | 69 mi (US) | 70 mi (US) | 71 mi (US) | 72 mi (US) | 73 mi (US) | 74 mi (US) | 75 mi (US) | 76 mi (US) | 77 mi (US) | 78 mi (US) | 79 mi (US) | 80 mi (US) | 81 mi (US) | 82 mi (US) | 83 mi (US) | 84 mi (US) | 85 mi (US) | 86 mi (US) | 87 mi (US) | 88 mi (US) | 89 mi (US) | 90 mi (US) | 91 mi (US) | 92 mi (US) | 93 mi (US) | 94 mi (US) | 95 mi (US) | 96 mi (US) | 97 mi (US) | 98 mi (US) | 99 mi (US) | 100 mi (US) |
| light-year | 1.7011176861643 × 10-13 ly | 3.4022353723286 × 10-13 ly | 5.1033530584929 × 10-13 ly | 6.8044707446572 × 10-13 ly | 8.5055884308215 × 10-13 ly | 1.0206706116986 × 10-12 ly | 1.190782380315 × 10-12 ly | 1.3608941489314 × 10-12 ly | 1.5310059175479 × 10-12 ly | 1.7011176861643 × 10-12 ly | 1.8712294547807 × 10-12 ly | 2.0413412233971 × 10-12 ly | 2.2114529920136 × 10-12 ly | 2.38156476063 × 10-12 ly | 2.5516765292464 × 10-12 ly | 2.7217882978629 × 10-12 ly | 2.8919000664793 × 10-12 ly | 3.0620118350957 × 10-12 ly | 3.2321236037122 × 10-12 ly | 3.4022353723286 × 10-12 ly | 3.572347140945 × 10-12 ly | 3.7424589095614 × 10-12 ly | 3.9125706781779 × 10-12 ly | 4.0826824467943 × 10-12 ly | 4.2527942154107 × 10-12 ly | 4.4229059840272 × 10-12 ly | 4.5930177526436 × 10-12 ly | 4.76312952126 × 10-12 ly | 4.9332412898764 × 10-12 ly | 5.1033530584929 × 10-12 ly | 5.2734648271093 × 10-12 ly | 5.4435765957257 × 10-12 ly | 5.6136883643422 × 10-12 ly | 5.7838001329586 × 10-12 ly | 5.953911901575 × 10-12 ly | 6.1240236701914 × 10-12 ly | 6.2941354388079 × 10-12 ly | 6.4642472074243 × 10-12 ly | 6.6343589760407 × 10-12 ly | 6.8044707446572 × 10-12 ly | 6.9745825132736 × 10-12 ly | 7.14469428189 × 10-12 ly | 7.3148060505065 × 10-12 ly | 7.4849178191229 × 10-12 ly | 7.6550295877393 × 10-12 ly | 7.8251413563557 × 10-12 ly | 7.9952531249722 × 10-12 ly | 8.1653648935886 × 10-12 ly | 8.335476662205 × 10-12 ly | 8.5055884308215 × 10-12 ly | 8.6757001994379 × 10-12 ly | 8.8458119680543 × 10-12 ly | 9.0159237366707 × 10-12 ly | 9.1860355052872 × 10-12 ly | 9.3561472739036 × 10-12 ly | 9.52625904252 × 10-12 ly | 9.6963708111365 × 10-12 ly | 9.8664825797529 × 10-12 ly | 1.0036594348369 × 10-11 ly | 1.0206706116986 × 10-11 ly | 1.0376817885602 × 10-11 ly | 1.0546929654219 × 10-11 ly | 1.0717041422835 × 10-11 ly | 1.0887153191451 × 10-11 ly | 1.1057264960068 × 10-11 ly | 1.1227376728684 × 10-11 ly | 1.1397488497301 × 10-11 ly | 1.1567600265917 × 10-11 ly | 1.1737712034534 × 10-11 ly | 1.190782380315 × 10-11 ly | 1.2077935571766 × 10-11 ly | 1.2248047340383 × 10-11 ly | 1.2418159108999 × 10-11 ly | 1.2588270877616 × 10-11 ly | 1.2758382646232 × 10-11 ly | 1.2928494414849 × 10-11 ly | 1.3098606183465 × 10-11 ly | 1.3268717952081 × 10-11 ly | 1.3438829720698 × 10-11 ly | 1.3608941489314 × 10-11 ly | 1.3779053257931 × 10-11 ly | 1.3949165026547 × 10-11 ly | 1.4119276795164 × 10-11 ly | 1.428938856378 × 10-11 ly | 1.4459500332396 × 10-11 ly | 1.4629612101013 × 10-11 ly | 1.4799723869629 × 10-11 ly | 1.4969835638246 × 10-11 ly | 1.5139947406862 × 10-11 ly | 1.5310059175479 × 10-11 ly | 1.5480170944095 × 10-11 ly | 1.5650282712711 × 10-11 ly | 1.5820394481328 × 10-11 ly | 1.5990506249944 × 10-11 ly | 1.6160618018561 × 10-11 ly | 1.6330729787177 × 10-11 ly | 1.6500841555794 × 10-11 ly | 1.667095332441 × 10-11 ly | 1.6841065093026 × 10-11 ly | 1.7011176861643 × 10-11 ly |
≡ 5280 US Survey feet ≡ (5280 × 1200⁄3937) m
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| mile (US Survey) | mi (US) | ≡ 5280 US Survey feet ≡ (5280 × 1200⁄3937) m | ≈ 1609.347219 m | Imperial/US |
| miles (US Survey) | light-years | miles (US Survey) | light-years |
|---|---|---|---|
| 1 | ≈ 1.7011176861643E-13 | 4 | ≈ 6.8044707446572E-13 |
| 1.5 | ≈ 2.5516765292464E-13 | 4.5 | ≈ 7.6550295877393E-13 |
| 2 | ≈ 3.4022353723286E-13 | 5 | ≈ 8.5055884308215E-13 |
| 2.5 | ≈ 4.2527942154107E-13 | 5.5 | ≈ 9.3561472739036E-13 |
| 3 | ≈ 5.1033530584929E-13 | 6 | ≈ 1.0206706116986E-12 |
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 | miles (US Survey) | light-years | miles (US Survey) |
|---|---|---|---|
| 1 | ≈ 5878488056019.3 | 4 | ≈ 23513952224077 |
| 1.5 | ≈ 8817732084029 | 4.5 | ≈ 26453196252087 |
| 2 | ≈ 11756976112039 | 5 | ≈ 29392440280097 |
| 2.5 | ≈ 14696220140048 | 5.5 | ≈ 32331684308106 |
| 3 | ≈ 17635464168058 | 6 | ≈ 35270928336116 |
| miles (US Survey) | light-years |
|---|---|
| 1 | ≈ 1.7011176861643 × 10-13 |
| 5,878,488,056,019.3 | ≈ 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 …) |