| 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) |
| line | 0.1889764 ln | 0.3779528 ln | 0.5669291 ln | 0.7559055 ln | 0.9448819 ln | 1.1338583 ln | 1.3228346 ln | 1.5118110 ln | 1.7007874 ln | 1.8897638 ln | 2.0787402 ln | 2.2677165 ln | 2.4566929 ln | 2.6456693 ln | 2.8346457 ln | 3.0236220 ln | 3.2125984 ln | 3.4015748 ln | 3.5905512 ln | 3.7795276 ln | 3.9685039 ln | 4.1574803 ln | 4.3464567 ln | 4.5354331 ln | 4.7244094 ln | 4.9133858 ln | 5.1023622 ln | 5.2913386 ln | 5.4803150 ln | 5.6692913 ln | 5.8582677 ln | 6.0472441 ln | 6.2362205 ln | 6.4251969 ln | 6.6141732 ln | 6.8031496 ln | 6.9921260 ln | 7.1811024 ln | 7.3700787 ln | 7.5590551 ln | 7.7480315 ln | 7.9370079 ln | 8.1259843 ln | 8.3149606 ln | 8.5039370 ln | 8.6929134 ln | 8.8818898 ln | 9.0708661 ln | 9.2598425 ln | 9.4488189 ln | 9.6377953 ln | 9.8267717 ln | 10.0157480 ln | 10.2047244 ln | 10.3937008 ln | 10.5826772 ln | 10.7716535 ln | 10.9606299 ln | 11.1496063 ln | 11.3385827 ln | 11.5275591 ln | 11.7165354 ln | 11.9055118 ln | 12.0944882 ln | 12.2834646 ln | 12.4724409 ln | 12.6614173 ln | 12.8503937 ln | 13.0393701 ln | 13.2283465 ln | 13.4173228 ln | 13.6062992 ln | 13.7952756 ln | 13.9842520 ln | 14.1732283 ln | 14.3622047 ln | 14.5511811 ln | 14.7401575 ln | 14.9291339 ln | 15.1181102 ln | 15.3070866 ln | 15.4960630 ln | 15.6850394 ln | 15.8740157 ln | 16.0629921 ln | 16.2519685 ln | 16.4409449 ln | 16.6299213 ln | 16.8188976 ln | 17.0078740 ln | 17.1968504 ln | 17.3858268 ln | 17.5748031 ln | 17.7637795 ln | 17.9527559 ln | 18.1417323 ln | 18.3307087 ln | 18.5196850 ln | 18.7086614 ln | 18.8976378 ln |
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 | lines | metric inches | lines |
|---|---|---|---|
| 1 | = 0.18897637795276 | 4 | = 0.75590551181102 |
| 1.5 | = 0.28346456692913 | 4.5 | = 0.8503937007874 |
| 2 | = 0.37795275590551 | 5 | = 0.94488188976378 |
| 2.5 | = 0.47244094488189 | 5.5 | = 1.0393700787402 |
| 3 | = 0.56692913385827 | 6 | = 1.1338582677165 |
The line (abbreviated L or l) was a small English unit of length, variously reckoned as 1⁄10, 1⁄12, 1⁄16, or 1⁄40 of an inch. It was not included among the units authorized as the British Imperial system in 1824.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| line | ln | ≡ 1⁄12 in | = 0.002116 m | Imperial/US |
| lines | metric inches | lines | metric inches |
|---|---|---|---|
| 1 | = 5.2916666666667 | 4 | = 21.166666666667 |
| 1.5 | = 7.9375 | 4.5 | = 23.8125 |
| 2 | = 10.583333333333 | 5 | = 26.458333333333 |
| 2.5 | = 13.229166666667 | 5.5 | = 29.104166666667 |
| 3 | = 15.875 | 6 | = 31.75 |
| metric inches | lines |
|---|---|
| 1 | = 0.1889764 |
| 5.2916667 | = 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 …) |