| 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) |
| palm | 0.0052493 palm | 0.0104987 palm | 0.0157480 palm | 0.0209974 palm | 0.0262467 palm | 0.0314961 palm | 0.0367454 palm | 0.0419948 palm | 0.0472441 palm | 0.0524934 palm | 0.0577428 palm | 0.0629921 palm | 0.0682415 palm | 0.0734908 palm | 0.0787402 palm | 0.0839895 palm | 0.0892388 palm | 0.0944882 palm | 0.0997375 palm | 0.1049869 palm | 0.1102362 palm | 0.1154856 palm | 0.1207349 palm | 0.1259843 palm | 0.1312336 palm | 0.1364829 palm | 0.1417323 palm | 0.1469816 palm | 0.1522310 palm | 0.1574803 palm | 0.1627297 palm | 0.1679790 palm | 0.1732283 palm | 0.1784777 palm | 0.1837270 palm | 0.1889764 palm | 0.1942257 palm | 0.1994751 palm | 0.2047244 palm | 0.2099738 palm | 0.2152231 palm | 0.2204724 palm | 0.2257218 palm | 0.2309711 palm | 0.2362205 palm | 0.2414698 palm | 0.2467192 palm | 0.2519685 palm | 0.2572178 palm | 0.2624672 palm | 0.2677165 palm | 0.2729659 palm | 0.2782152 palm | 0.2834646 palm | 0.2887139 palm | 0.2939633 palm | 0.2992126 palm | 0.3044619 palm | 0.3097113 palm | 0.3149606 palm | 0.3202100 palm | 0.3254593 palm | 0.3307087 palm | 0.3359580 palm | 0.3412073 palm | 0.3464567 palm | 0.3517060 palm | 0.3569554 palm | 0.3622047 palm | 0.3674541 palm | 0.3727034 palm | 0.3779528 palm | 0.3832021 palm | 0.3884514 palm | 0.3937008 palm | 0.3989501 palm | 0.4041995 palm | 0.4094488 palm | 0.4146982 palm | 0.4199475 palm | 0.4251969 palm | 0.4304462 palm | 0.4356955 palm | 0.4409449 palm | 0.4461942 palm | 0.4514436 palm | 0.4566929 palm | 0.4619423 palm | 0.4671916 palm | 0.4724409 palm | 0.4776903 palm | 0.4829396 palm | 0.4881890 palm | 0.4934383 palm | 0.4986877 palm | 0.5039370 palm | 0.5091864 palm | 0.5144357 palm | 0.5196850 palm | 0.5249344 palm |
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 | palms | metric inches | palms |
|---|---|---|---|
| 1 | = 0.005249343832021 | 4 | = 0.020997375328084 |
| 1.5 | = 0.0078740157480315 | 4.5 | = 0.023622047244094 |
| 2 | = 0.010498687664042 | 5 | = 0.026246719160105 |
| 2.5 | = 0.013123359580052 | 5.5 | = 0.028871391076115 |
| 3 | = 0.015748031496063 | 6 | = 0.031496062992126 |
The palm is an obsolete anthropic unit of length, originally based on the width of the human palm and then variously standardized. The same name is also used for a second, rather larger unit based on the length of the human hand.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| palm | ≡ 3 in | = 0.0762 m | Other (Length) |
| palms | metric inches | palms | metric inches |
|---|---|---|---|
| 1 | = 190.5 | 4 | = 762 |
| 1.5 | = 285.75 | 4.5 | = 857.25 |
| 2 | = 381 | 5 | = 952.5 |
| 2.5 | = 476.25 | 5.5 | = 1047.75 |
| 3 | = 571.5 | 6 | = 1143 |
| metric inches | palms |
|---|---|
| 1 | = 0.0052493 |
| 190.5 | = 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 …) |