| 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) |
| astronomical unit | 2.6738348489074 × 10-15 AU | 5.3476696978148 × 10-15 AU | 8.0215045467221 × 10-15 AU | 1.069533939563 × 10-14 AU | 1.3369174244537 × 10-14 AU | 1.6043009093444 × 10-14 AU | 1.8716843942352 × 10-14 AU | 2.1390678791259 × 10-14 AU | 2.4064513640166 × 10-14 AU | 2.6738348489074 × 10-14 AU | 2.9412183337981 × 10-14 AU | 3.2086018186889 × 10-14 AU | 3.4759853035796 × 10-14 AU | 3.7433687884703 × 10-14 AU | 4.0107522733611 × 10-14 AU | 4.2781357582518 × 10-14 AU | 4.5455192431425 × 10-14 AU | 4.8129027280333 × 10-14 AU | 5.080286212924 × 10-14 AU | 5.3476696978148 × 10-14 AU | 5.6150531827055 × 10-14 AU | 5.8824366675962 × 10-14 AU | 6.149820152487 × 10-14 AU | 6.4172036373777 × 10-14 AU | 6.6845871222684 × 10-14 AU | 6.9519706071592 × 10-14 AU | 7.2193540920499 × 10-14 AU | 7.4867375769407 × 10-14 AU | 7.7541210618314 × 10-14 AU | 8.0215045467221 × 10-14 AU | 8.2888880316129 × 10-14 AU | 8.5562715165036 × 10-14 AU | 8.8236550013943 × 10-14 AU | 9.0910384862851 × 10-14 AU | 9.3584219711758 × 10-14 AU | 9.6258054560666 × 10-14 AU | 9.8931889409573 × 10-14 AU | 1.0160572425848 × 10-13 AU | 1.0427955910739 × 10-13 AU | 1.069533939563 × 10-13 AU | 1.096272288052 × 10-13 AU | 1.1230106365411 × 10-13 AU | 1.1497489850302 × 10-13 AU | 1.1764873335192 × 10-13 AU | 1.2032256820083 × 10-13 AU | 1.2299640304974 × 10-13 AU | 1.2567023789865 × 10-13 AU | 1.2834407274755 × 10-13 AU | 1.3101790759646 × 10-13 AU | 1.3369174244537 × 10-13 AU | 1.3636557729428 × 10-13 AU | 1.3903941214318 × 10-13 AU | 1.4171324699209 × 10-13 AU | 1.44387081841 × 10-13 AU | 1.4706091668991 × 10-13 AU | 1.4973475153881 × 10-13 AU | 1.5240858638772 × 10-13 AU | 1.5508242123663 × 10-13 AU | 1.5775625608554 × 10-13 AU | 1.6043009093444 × 10-13 AU | 1.6310392578335 × 10-13 AU | 1.6577776063226 × 10-13 AU | 1.6845159548116 × 10-13 AU | 1.7112543033007 × 10-13 AU | 1.7379926517898 × 10-13 AU | 1.7647310002789 × 10-13 AU | 1.7914693487679 × 10-13 AU | 1.818207697257 × 10-13 AU | 1.8449460457461 × 10-13 AU | 1.8716843942352 × 10-13 AU | 1.8984227427242 × 10-13 AU | 1.9251610912133 × 10-13 AU | 1.9518994397024 × 10-13 AU | 1.9786377881915 × 10-13 AU | 2.0053761366805 × 10-13 AU | 2.0321144851696 × 10-13 AU | 2.0588528336587 × 10-13 AU | 2.0855911821478 × 10-13 AU | 2.1123295306368 × 10-13 AU | 2.1390678791259 × 10-13 AU | 2.165806227615 × 10-13 AU | 2.1925445761041 × 10-13 AU | 2.2192829245931 × 10-13 AU | 2.2460212730822 × 10-13 AU | 2.2727596215713 × 10-13 AU | 2.2994979700603 × 10-13 AU | 2.3262363185494 × 10-13 AU | 2.3529746670385 × 10-13 AU | 2.3797130155276 × 10-13 AU | 2.4064513640166 × 10-13 AU | 2.4331897125057 × 10-13 AU | 2.4599280609948 × 10-13 AU | 2.4866664094839 × 10-13 AU | 2.5134047579729 × 10-13 AU | 2.540143106462 × 10-13 AU | 2.5668814549511 × 10-13 AU | 2.5936198034402 × 10-13 AU | 2.6203581519292 × 10-13 AU | 2.6470965004183 × 10-13 AU | 2.6738348489074 × 10-13 AU |
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 | astronomical units | metric inches | astronomical units |
|---|---|---|---|
| 1 | = 2.6738348489074E-15 | 4 | = 1.069533939563E-14 |
| 1.5 | = 4.0107522733611E-15 | 4.5 | = 1.2032256820083E-14 |
| 2 | = 5.3476696978148E-15 | 5 | = 1.3369174244537E-14 |
| 2.5 | = 6.6845871222684E-15 | 5.5 | = 1.4706091668991E-14 |
| 3 | = 8.0215045467221E-15 | 6 | = 1.6043009093444E-14 |
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 unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| astronomical unit | AU | ≡ 149 597 870 700 m ≈ Distance from Earth to Sun | ≡ 149 597 870 700 m | Science - Astronomy (Length) |
| astronomical units | metric inches | astronomical units | metric inches |
|---|---|---|---|
| 1 | = 3.7399467675E+14 | 4 | = 1.495978707E+15 |
| 1.5 | = 5.60992015125E+14 | 4.5 | = 1.682976045375E+15 |
| 2 | = 7.479893535E+14 | 5 | = 1.86997338375E+15 |
| 2.5 | = 9.34986691875E+14 | 5.5 | = 2.056970722125E+15 |
| 3 | = 1.12198403025E+15 | 6 | = 2.2439680605E+15 |
| metric inches | astronomical units |
|---|---|
| 1 | = 2.6738348489074 × 10-15 |
| 3.7399467675 × 1014 | = 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 …) |