| metric inch | 1 in (metric) | 2 in (metric) | 3 in (metric) | 4 in (metric) | 5 in (metric) | 6 in (metric) | 7 in (metric) | 8 in (metric) | 9 in (metric) | 10 in (metric) | 11 in (metric) | 12 in (metric) | 13 in (metric) | 14 in (metric) | 15 in (metric) | 16 in (metric) | 17 in (metric) | 18 in (metric) | 19 in (metric) | 20 in (metric) | 21 in (metric) | 22 in (metric) | 23 in (metric) | 24 in (metric) | 25 in (metric) | 26 in (metric) | 27 in (metric) | 28 in (metric) | 29 in (metric) | 30 in (metric) | 31 in (metric) | 32 in (metric) | 33 in (metric) | 34 in (metric) | 35 in (metric) | 36 in (metric) | 37 in (metric) | 38 in (metric) | 39 in (metric) | 40 in (metric) | 41 in (metric) | 42 in (metric) | 43 in (metric) | 44 in (metric) | 45 in (metric) | 46 in (metric) | 47 in (metric) | 48 in (metric) | 49 in (metric) | 50 in (metric) | 51 in (metric) | 52 in (metric) | 53 in (metric) | 54 in (metric) | 55 in (metric) | 56 in (metric) | 57 in (metric) | 58 in (metric) | 59 in (metric) | 60 in (metric) | 61 in (metric) | 62 in (metric) | 63 in (metric) | 64 in (metric) | 65 in (metric) | 66 in (metric) | 67 in (metric) | 68 in (metric) | 69 in (metric) | 70 in (metric) | 71 in (metric) | 72 in (metric) | 73 in (metric) | 74 in (metric) | 75 in (metric) | 76 in (metric) | 77 in (metric) | 78 in (metric) | 79 in (metric) | 80 in (metric) | 81 in (metric) | 82 in (metric) | 83 in (metric) | 84 in (metric) | 85 in (metric) | 86 in (metric) | 87 in (metric) | 88 in (metric) | 89 in (metric) | 90 in (metric) | 91 in (metric) | 92 in (metric) | 93 in (metric) | 94 in (metric) | 95 in (metric) | 96 in (metric) | 97 in (metric) | 98 in (metric) | 99 in (metric) | 100 in (metric) |
| light-day | 1.54427821851 × 10-17 ly | 3.0885564370199 × 10-17 ly | 4.6328346555299 × 10-17 ly | 6.1771128740399 × 10-17 ly | 7.7213910925498 × 10-17 ly | 9.2656693110598 × 10-17 ly | 1.080994752957 × 10-16 ly | 1.235422574808 × 10-16 ly | 1.389850396659 × 10-16 ly | 1.54427821851 × 10-16 ly | 1.698706040361 × 10-16 ly | 1.853133862212 × 10-16 ly | 2.007561684063 × 10-16 ly | 2.1619895059139 × 10-16 ly | 2.3164173277649 × 10-16 ly | 2.4708451496159 × 10-16 ly | 2.6252729714669 × 10-16 ly | 2.7797007933179 × 10-16 ly | 2.9341286151689 × 10-16 ly | 3.0885564370199 × 10-16 ly | 3.2429842588709 × 10-16 ly | 3.3974120807219 × 10-16 ly | 3.5518399025729 × 10-16 ly | 3.7062677244239 × 10-16 ly | 3.8606955462749 × 10-16 ly | 4.0151233681259 × 10-16 ly | 4.1695511899769 × 10-16 ly | 4.3239790118279 × 10-16 ly | 4.4784068336789 × 10-16 ly | 4.6328346555299 × 10-16 ly | 4.7872624773809 × 10-16 ly | 4.9416902992319 × 10-16 ly | 5.0961181210829 × 10-16 ly | 5.2505459429339 × 10-16 ly | 5.4049737647849 × 10-16 ly | 5.5594015866359 × 10-16 ly | 5.7138294084869 × 10-16 ly | 5.8682572303379 × 10-16 ly | 6.0226850521889 × 10-16 ly | 6.1771128740399 × 10-16 ly | 6.3315406958908 × 10-16 ly | 6.4859685177418 × 10-16 ly | 6.6403963395928 × 10-16 ly | 6.7948241614438 × 10-16 ly | 6.9492519832948 × 10-16 ly | 7.1036798051458 × 10-16 ly | 7.2581076269968 × 10-16 ly | 7.4125354488478 × 10-16 ly | 7.5669632706988 × 10-16 ly | 7.7213910925498 × 10-16 ly | 7.8758189144008 × 10-16 ly | 8.0302467362518 × 10-16 ly | 8.1846745581028 × 10-16 ly | 8.3391023799538 × 10-16 ly | 8.4935302018048 × 10-16 ly | 8.6479580236558 × 10-16 ly | 8.8023858455068 × 10-16 ly | 8.9568136673578 × 10-16 ly | 9.1112414892088 × 10-16 ly | 9.2656693110598 × 10-16 ly | 9.4200971329108 × 10-16 ly | 9.5745249547618 × 10-16 ly | 9.7289527766128 × 10-16 ly | 9.8833805984638 × 10-16 ly | 1.0037808420315 × 10-15 ly | 1.0192236242166 × 10-15 ly | 1.0346664064017 × 10-15 ly | 1.0501091885868 × 10-15 ly | 1.0655519707719 × 10-15 ly | 1.080994752957 × 10-15 ly | 1.0964375351421 × 10-15 ly | 1.1118803173272 × 10-15 ly | 1.1273230995123 × 10-15 ly | 1.1427658816974 × 10-15 ly | 1.1582086638825 × 10-15 ly | 1.1736514460676 × 10-15 ly | 1.1890942282527 × 10-15 ly | 1.2045370104378 × 10-15 ly | 1.2199797926229 × 10-15 ly | 1.235422574808 × 10-15 ly | 1.2508653569931 × 10-15 ly | 1.2663081391782 × 10-15 ly | 1.2817509213633 × 10-15 ly | 1.2971937035484 × 10-15 ly | 1.3126364857335 × 10-15 ly | 1.3280792679186 × 10-15 ly | 1.3435220501037 × 10-15 ly | 1.3589648322888 × 10-15 ly | 1.3744076144739 × 10-15 ly | 1.389850396659 × 10-15 ly | 1.4052931788441 × 10-15 ly | 1.4207359610292 × 10-15 ly | 1.4361787432143 × 10-15 ly | 1.4516215253994 × 10-15 ly | 1.4670643075845 × 10-15 ly | 1.4825070897696 × 10-15 ly | 1.4979498719547 × 10-15 ly | 1.5133926541398 × 10-15 ly | 1.5288354363249 × 10-15 ly | 1.54427821851 × 10-15 ly |
A metric inch is a nickname for a preferred 1⁄4 subdivision of an ISO 2848 basic module, or 1⁄12 of a metric foot measuring 25 millimetres (0.984 in). A metric inch is 0.4 millimetres (0.016 in) shorter than an inch.
The term was similarly used to refer to the historical Soviet Bloc practice of spacing integrated circuit pins at 1⁄10 of a 25 mm "metric inch" length, instead of the western practice of 1⁄10 of an imperial inch.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| metric inch | in (metric) | = 0.016 in | = 0.0004 m | Metric system SI |
| metric inches | light-days | metric inches | light-days |
|---|---|---|---|
| 1 | = 1.54427821851E-17 | 4 | = 6.1771128740399E-17 |
| 1.5 | = 2.3164173277649E-17 | 4.5 | = 6.9492519832948E-17 |
| 2 | = 3.0885564370199E-17 | 5 | = 7.7213910925498E-17 |
| 2.5 | = 3.8606955462749E-17 | 5.5 | = 8.4935302018048E-17 |
| 3 | = 4.6328346555299E-17 | 6 | = 9.2656693110598E-17 |
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 unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| light-day | ly | ≡ 24 light-hours | ≡ 2.59020683712×1013 m | Science - Astronomy (Length) |
| light-days | metric inches | light-days | metric inches |
|---|---|---|---|
| 1 | = 6.4755170928E+16 | 4 | = 2.59020683712E+17 |
| 1.5 | = 9.7132756392E+16 | 4.5 | = 2.91398269176E+17 |
| 2 | = 1.29510341856E+17 | 5 | = 3.2377585464E+17 |
| 2.5 | = 1.6188792732E+17 | 5.5 | = 3.56153440104E+17 |
| 3 | = 1.94265512784E+17 | 6 | = 3.88531025568E+17 |
| metric inches | light-days |
|---|---|
| 1 | = 1.54427821851 × 10-17 |
| 6.4755170928 × 1016 | = 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 …) |