| 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) |
| barleycorn | 0.0472813 barleycorn | 0.0945626 barleycorn | 0.1418440 barleycorn | 0.1891253 barleycorn | 0.2364066 barleycorn | 0.2836879 barleycorn | 0.3309693 barleycorn | 0.3782506 barleycorn | 0.4255319 barleycorn | 0.4728132 barleycorn | 0.5200946 barleycorn | 0.5673759 barleycorn | 0.6146572 barleycorn | 0.6619385 barleycorn | 0.7092199 barleycorn | 0.7565012 barleycorn | 0.8037825 barleycorn | 0.8510638 barleycorn | 0.8983452 barleycorn | 0.9456265 barleycorn | 0.9929078 barleycorn | 1.0401891 barleycorn | 1.0874704 barleycorn | 1.1347518 barleycorn | 1.1820331 barleycorn | 1.2293144 barleycorn | 1.2765957 barleycorn | 1.3238771 barleycorn | 1.3711584 barleycorn | 1.4184397 barleycorn | 1.4657210 barleycorn | 1.5130024 barleycorn | 1.5602837 barleycorn | 1.6075650 barleycorn | 1.6548463 barleycorn | 1.7021277 barleycorn | 1.7494090 barleycorn | 1.7966903 barleycorn | 1.8439716 barleycorn | 1.8912530 barleycorn | 1.9385343 barleycorn | 1.9858156 barleycorn | 2.0330969 barleycorn | 2.0803783 barleycorn | 2.1276596 barleycorn | 2.1749409 barleycorn | 2.2222222 barleycorn | 2.2695035 barleycorn | 2.3167849 barleycorn | 2.3640662 barleycorn | 2.4113475 barleycorn | 2.4586288 barleycorn | 2.5059102 barleycorn | 2.5531915 barleycorn | 2.6004728 barleycorn | 2.6477541 barleycorn | 2.6950355 barleycorn | 2.7423168 barleycorn | 2.7895981 barleycorn | 2.8368794 barleycorn | 2.8841608 barleycorn | 2.9314421 barleycorn | 2.9787234 barleycorn | 3.0260047 barleycorn | 3.0732861 barleycorn | 3.1205674 barleycorn | 3.1678487 barleycorn | 3.2151300 barleycorn | 3.2624113 barleycorn | 3.3096927 barleycorn | 3.3569740 barleycorn | 3.4042553 barleycorn | 3.4515366 barleycorn | 3.4988180 barleycorn | 3.5460993 barleycorn | 3.5933806 barleycorn | 3.6406619 barleycorn | 3.6879433 barleycorn | 3.7352246 barleycorn | 3.7825059 barleycorn | 3.8297872 barleycorn | 3.8770686 barleycorn | 3.9243499 barleycorn | 3.9716312 barleycorn | 4.0189125 barleycorn | 4.0661939 barleycorn | 4.1134752 barleycorn | 4.1607565 barleycorn | 4.2080378 barleycorn | 4.2553191 barleycorn | 4.3026005 barleycorn | 4.3498818 barleycorn | 4.3971631 barleycorn | 4.4444444 barleycorn | 4.4917258 barleycorn | 4.5390071 barleycorn | 4.5862884 barleycorn | 4.6335697 barleycorn | 4.6808511 barleycorn | 4.7281324 barleycorn |
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 | barleycorns | metric inches | barleycorns |
|---|---|---|---|
| 1 | ≈ 0.047281323877069 | 4 | ≈ 0.18912529550827 |
| 1.5 | ≈ 0.070921985815603 | 4.5 | ≈ 0.21276595744681 |
| 2 | ≈ 0.094562647754137 | 5 | ≈ 0.23640661938534 |
| 2.5 | ≈ 0.11820330969267 | 5.5 | ≈ 0.26004728132388 |
| 3 | ≈ 0.14184397163121 | 6 | ≈ 0.28368794326241 |
The barleycorn is a small English unit of length equal to 1⁄3 of an inch (i.e., close to 0.8467 cm) still used in Great Britain and Ireland as a determiner of shoe sizes.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| barleycorn | = 1⁄3 in | ≈ 8.46×10−3 m | Imperial/US |
| barleycorns | metric inches | barleycorns | metric inches |
|---|---|---|---|
| 1 | ≈ 21.15 | 4 | ≈ 84.6 |
| 1.5 | ≈ 31.725 | 4.5 | ≈ 95.175 |
| 2 | ≈ 42.3 | 5 | ≈ 105.75 |
| 2.5 | ≈ 52.875 | 5.5 | ≈ 116.325 |
| 3 | ≈ 63.45 | 6 | ≈ 126.9 |
| metric inches | barleycorns |
|---|---|
| 1 | ≈ 0.0472813 |
| 21.15 | ≈ 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 …) |