| 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) |
| cubit | 0.0008 cubit | 0.0016 cubit | 0.0024 cubit | 0.0032 cubit | 0.004 cubit | 0.0048 cubit | 0.0056 cubit | 0.0064 cubit | 0.0072 cubit | 0.008 cubit | 0.0088 cubit | 0.0096 cubit | 0.0104 cubit | 0.0112 cubit | 0.012 cubit | 0.0128 cubit | 0.0136 cubit | 0.0144 cubit | 0.0152 cubit | 0.016 cubit | 0.0168 cubit | 0.0176 cubit | 0.0184 cubit | 0.0192 cubit | 0.02 cubit | 0.0208 cubit | 0.0216 cubit | 0.0224 cubit | 0.0232 cubit | 0.024 cubit | 0.0248 cubit | 0.0256 cubit | 0.0264 cubit | 0.0272 cubit | 0.028 cubit | 0.0288 cubit | 0.0296 cubit | 0.0304 cubit | 0.0312 cubit | 0.032 cubit | 0.0328 cubit | 0.0336 cubit | 0.0344 cubit | 0.0352 cubit | 0.036 cubit | 0.0368 cubit | 0.0376 cubit | 0.0384 cubit | 0.0392 cubit | 0.04 cubit | 0.0408 cubit | 0.0416 cubit | 0.0424 cubit | 0.0432 cubit | 0.044 cubit | 0.0448 cubit | 0.0456 cubit | 0.0464 cubit | 0.0472 cubit | 0.048 cubit | 0.0488 cubit | 0.0496 cubit | 0.0504 cubit | 0.0512 cubit | 0.052 cubit | 0.0528 cubit | 0.0536 cubit | 0.0544 cubit | 0.0552 cubit | 0.056 cubit | 0.0568 cubit | 0.0576 cubit | 0.0584 cubit | 0.0592 cubit | 0.06 cubit | 0.0608 cubit | 0.0616 cubit | 0.0624 cubit | 0.0632 cubit | 0.064 cubit | 0.0648 cubit | 0.0656 cubit | 0.0664 cubit | 0.0672 cubit | 0.068 cubit | 0.0688 cubit | 0.0696 cubit | 0.0704 cubit | 0.0712 cubit | 0.072 cubit | 0.0728 cubit | 0.0736 cubit | 0.0744 cubit | 0.0752 cubit | 0.076 cubit | 0.0768 cubit | 0.0776 cubit | 0.0784 cubit | 0.0792 cubit | 0.08 cubit |
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 | cubit | metric inches | cubit |
|---|---|---|---|
| 1 | ≈ 0.0008 | 4 | ≈ 0.0032 |
| 1.5 | ≈ 0.0012 | 4.5 | ≈ 0.0036 |
| 2 | ≈ 0.0016 | 5 | ≈ 0.004 |
| 2.5 | ≈ 0.002 | 5.5 | ≈ 0.0044 |
| 3 | ≈ 0.0024 | 6 | ≈ 0.0048 |
The cubit is an ancient unit based on the forearm length from the tip of the middle finger to the bottom of the elbow. Cubits of various lengths were employed in many parts of the world in antiquity, during the Middle Ages and as recently as Early Modern Times. The term is still used in hedge laying, the length of the forearm being frequently used to determine the interval between stakes placed within the hedge.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| cubit | ≡ Distance from fingers to elbow ≈ 18 in | ≈ 0.5 m | Other (Length) |
| cubit | metric inches | cubit | metric inches |
|---|---|---|---|
| 1 | ≈ 1250 | 4 | ≈ 5000 |
| 1.5 | ≈ 1875 | 4.5 | ≈ 5625 |
| 2 | ≈ 2500 | 5 | ≈ 6250 |
| 2.5 | ≈ 3125 | 5.5 | ≈ 6875 |
| 3 | ≈ 3750 | 6 | ≈ 7500 |
| metric inches | cubit |
|---|---|
| 1 | ≈ 0.0008 |
| 1 250 | ≈ 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 …) |