Дюйм (русское обозначение: дюйм; международное: inch, in или ″ — двойной штрих; от нидерл. duim — большой палец) — неметрическая единица измерения расстояния и длины в некоторых системах мер. В настоящее время под дюймом обычно подразумевают используемый в США английский дюйм (англ. inch), в точности равный 2,54 см. Подробнее можно почитать в Википедии.
| дюйм | мм | дюйм | мм | |
| 1/32 | 0,7938 | 1-3/4 | 44,45 | |
| 1/16 | 1,5875 | 1-25/32 | 45,2438 | |
| 3/32 | 2,3812 | 1-13/16 | 46,0375 | |
| 1/8 | 3,175 | 1-27/32 | 46,8312 | |
| 5/32 | 3,9688 | 1-7/8 | 47,625 | |
| 3/16 | 4,7625 | 1-29/32 | 48,4188 | |
| 7/32 | 5,5562 | 1-15/16 | 49,2125 | |
| 1/4 | 6,35 | 1-31/32 | 50,0062 | |
| 9/32 | 7,1438 | 2 | 50,8 | |
| 5/16 | 7,9375 | 2-1/32 | 51,594 | |
| 11/32 | 8,7312 | 2-1/16 | 52,388 | |
| 3/8 | 9,525 | 2-3/32 | 53,181 | |
| 13/32 | 10,3188 | 2-1/8 | 53,975 | |
| 7/16 | 11,1125 | 2-5/32 | 54,769 | |
| 15/32 | 11,9062 | 2-3/16 | 55,563 | |
| 1/2 | 12,7 | 2-7/32 | 56,356 | |
| 17/32 | 13,4938 | 2-1/4 | 53,15 | |
| 9/16 | 14,2875 | 2-9/32 | 57,944 | |
| 19/32 | 15,0812 | 2-5/16 | 58,738 | |
| 5/8 | 15,875 | 2-11/32 | 59,531 | |
| 21/32 | 16,6688 | 2-3/8 | 60,325 | |
| 11/16 | 17,4625 | 2-13/32 | 61,119 | |
| 23/32 | 18,2562 | 2-7/16 | 61,9125 | |
| 3/4 | 19,05 | 2-15/32 | 62,7062 | |
| 25/32 | 19,8438 | 2-1/2 | 63,5 | |
| 13/16 | 20,6375 | 2-17/32 | 64,2938 | |
| 27/32 | 21,4312 | 2-9/16 | 65,0875 | |
| 7/8 | 22,225 | 2-19/32 | 65,8812 | |
| 29/32 | 23,0188 | 2-5/8 | 66,675 | |
| 15/16 | 23,8125 | 2-21/32 | 67,4688 | |
| 31/32 | 24,6062 | 2-11/16 | 68,2625 | |
| 1 | 25,4 | 2-23/32 | 69,0562 | |
| 1-1/32 | 26,1938 | 2-3/4 | 69,85 | |
| 1-1/16 | 26,9875 | 2-25/32 | 70,6438 | |
| 1-3/32 | 27,7812 | 2-13/16 | 71,4375 | |
| 1-1/8 | 28,575 | 2-27/32 | 72,2312 | |
| 1-5/32 | 29,3688 | 2-7/8 | 73,025 | |
| 1-3/16 | 30,1625 | 2-29/32 | 73,8188 | |
| 1-7/32 | 30,9562 | 2-15/16 | 74,6125 | |
| 1-1/4 | 31,75 | 2-31/32 | 75,4062 | |
| 1-9/32 | 32,5438 | 3 | 76,2 | |
| 1-5/16 | 33,3375 | 3-1/32 | 76,9938 | |
| 1-11/32 | 34,1312 | 3-1/16 | 77,7875 | |
| 1-3/8 | 34,925 | 3-3/32 | 7835812 | |
| 1-13/32 | 35,7188 | 3-1/8 | 79,375 | |
| 1-7/16 | 36,5125 | 3-5/32 | 80,1688 | |
| 1-15/32 | 37,3062 | 3-3/16 | 80,9625 | |
| 1-1/2 | 38,1 | 3-7/32 | 81,7562 | |
| 1-17/32 | 38,8938 | 3-1/4 | 82,55 | |
| 1-9/16 | 39,6875 | 3-9/32 | 83,3438 | |
| 1-19/32 | 40,4812 | 3-5/16 | 84,1375 | |
| 1-5/8 | 41,275 | 3-11/32 | 84,9312 | |
| 1-21/32 | 42,0688 | 3-3/8 | 85,725 | |
| 1-11/16 | 42,8625 | 3-13/32 | 86,5188 | |
| 1-23/32 | 43,6562 | 3-7/16 | 87,31,25 |