| 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) |
| x unit | 3,991,617,603.0336 xu | 7,983,235,206.0673 xu | 11,974,852,809.101 xu | 15,966,470,412.135 xu | 19,958,088,015.168 xu | 23,949,705,618.202 xu | 27,941,323,221.235 xu | 31,932,940,824.269 xu | 35,924,558,427.303 xu | 39,916,176,030.336 xu | 43,907,793,633.37 xu | 47,899,411,236.404 xu | 51,891,028,839.437 xu | 55,882,646,442.471 xu | 59,874,264,045.504 xu | 63,865,881,648.538 xu | 67,857,499,251.572 xu | 71,849,116,854.605 xu | 75,840,734,457.639 xu | 79,832,352,060.673 xu | 83,823,969,663.706 xu | 87,815,587,266.74 xu | 91,807,204,869.773 xu | 95,798,822,472.807 xu | 99,790,440,075.841 xu | 103,782,057,678.87 xu | 107,773,675,281.91 xu | 111,765,292,884.94 xu | 115,756,910,487.98 xu | 119,748,528,091.01 xu | 123,740,145,694.04 xu | 127,731,763,297.08 xu | 131,723,380,900.11 xu | 135,714,998,503.14 xu | 139,706,616,106.18 xu | 143,698,233,709.21 xu | 147,689,851,312.24 xu | 151,681,468,915.28 xu | 155,673,086,518.31 xu | 159,664,704,121.35 xu | 163,656,321,724.38 xu | 167,647,939,327.41 xu | 171,639,556,930.45 xu | 175,631,174,533.48 xu | 179,622,792,136.51 xu | 183,614,409,739.55 xu | 187,606,027,342.58 xu | 191,597,644,945.61 xu | 195,589,262,548.65 xu | 199,580,880,151.68 xu | 203,572,497,754.72 xu | 207,564,115,357.75 xu | 211,555,732,960.78 xu | 215,547,350,563.82 xu | 219,538,968,166.85 xu | 223,530,585,769.88 xu | 227,522,203,372.92 xu | 231,513,820,975.95 xu | 235,505,438,578.98 xu | 239,497,056,182.02 xu | 243,488,673,785.05 xu | 247,480,291,388.09 xu | 251,471,908,991.12 xu | 255,463,526,594.15 xu | 259,455,144,197.19 xu | 263,446,761,800.22 xu | 267,438,379,403.25 xu | 271,429,997,006.29 xu | 275,421,614,609.32 xu | 279,413,232,212.35 xu | 283,404,849,815.39 xu | 287,396,467,418.42 xu | 291,388,085,021.45 xu | 295,379,702,624.49 xu | 299,371,320,227.52 xu | 303,362,937,830.56 xu | 307,354,555,433.59 xu | 311,346,173,036.62 xu | 315,337,790,639.66 xu | 319,329,408,242.69 xu | 323,321,025,845.72 xu | 327,312,643,448.76 xu | 331,304,261,051.79 xu | 335,295,878,654.82 xu | 339,287,496,257.86 xu | 343,279,113,860.89 xu | 347,270,731,463.93 xu | 351,262,349,066.96 xu | 355,253,966,669.99 xu | 359,245,584,273.03 xu | 363,237,201,876.06 xu | 367,228,819,479.09 xu | 371,220,437,082.13 xu | 375,212,054,685.16 xu | 379,203,672,288.19 xu | 383,195,289,891.23 xu | 387,186,907,494.26 xu | 391,178,525,097.3 xu | 395,170,142,700.33 xu | 399,161,760,303.36 xu |
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 | x units | metric inches | x units |
|---|---|---|---|
| 1 | ≈ 3991617603.0336 | 4 | ≈ 15966470412.135 |
| 1.5 | ≈ 5987426404.5504 | 4.5 | ≈ 17962279213.651 |
| 2 | ≈ 7983235206.0673 | 5 | ≈ 19958088015.168 |
| 2.5 | ≈ 9979044007.5841 | 5.5 | ≈ 21953896816.685 |
| 3 | ≈ 11974852809.101 | 6 | ≈ 23949705618.202 |
The x unit (symbol xu) is a unit of length approximately equal to 0.1 pm (10−13 m). It is used to quote the wavelength of X-rays and gamma rays.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| x unit | xu | ≈ 1.0021×10−13 m | ≈ 1.0021×10−13 m | Metric system Non-SI |
| x units | metric inches | x units | metric inches |
|---|---|---|---|
| 1 | ≈ 2.50525E-10 | 4 | ≈ 1.0021E-9 |
| 1.5 | ≈ 3.757875E-10 | 4.5 | ≈ 1.1273625E-9 |
| 2 | ≈ 5.0105E-10 | 5 | ≈ 1.252625E-9 |
| 2.5 | ≈ 6.263125E-10 | 5.5 | ≈ 1.3778875E-9 |
| 3 | ≈ 7.51575E-10 | 6 | ≈ 1.50315E-9 |
| metric inches | x units |
|---|---|
| 1 | ≈ 3,991,617,603.0336 |
| 2.50525 × 10-10 | ≈ 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 …) |