| thou | 1 th | 2 th | 3 th | 4 th | 5 th | 6 th | 7 th | 8 th | 9 th | 10 th | 11 th | 12 th | 13 th | 14 th | 15 th | 16 th | 17 th | 18 th | 19 th | 20 th | 21 th | 22 th | 23 th | 24 th | 25 th | 26 th | 27 th | 28 th | 29 th | 30 th | 31 th | 32 th | 33 th | 34 th | 35 th | 36 th | 37 th | 38 th | 39 th | 40 th | 41 th | 42 th | 43 th | 44 th | 45 th | 46 th | 47 th | 48 th | 49 th | 50 th | 51 th | 52 th | 53 th | 54 th | 55 th | 56 th | 57 th | 58 th | 59 th | 60 th | 61 th | 62 th | 63 th | 64 th | 65 th | 66 th | 67 th | 68 th | 69 th | 70 th | 71 th | 72 th | 73 th | 74 th | 75 th | 76 th | 77 th | 78 th | 79 th | 80 th | 81 th | 82 th | 83 th | 84 th | 85 th | 86 th | 87 th | 88 th | 89 th | 90 th | 91 th | 92 th | 93 th | 94 th | 95 th | 96 th | 97 th | 98 th | 99 th | 100 th |
| meter | 2.54 × 10-5 m | 5.08 × 10-5 m | 7.62 × 10-5 m | 0.0001016 m | 0.000127 m | 0.0001524 m | 0.0001778 m | 0.0002032 m | 0.0002286 m | 0.000254 m | 0.0002794 m | 0.0003048 m | 0.0003302 m | 0.0003556 m | 0.000381 m | 0.0004064 m | 0.0004318 m | 0.0004572 m | 0.0004826 m | 0.000508 m | 0.0005334 m | 0.0005588 m | 0.0005842 m | 0.0006096 m | 0.000635 m | 0.0006604 m | 0.0006858 m | 0.0007112 m | 0.0007366 m | 0.000762 m | 0.0007874 m | 0.0008128 m | 0.0008382 m | 0.0008636 m | 0.000889 m | 0.0009144 m | 0.0009398 m | 0.0009652 m | 0.0009906 m | 0.001016 m | 0.0010414 m | 0.0010668 m | 0.0010922 m | 0.0011176 m | 0.001143 m | 0.0011684 m | 0.0011938 m | 0.0012192 m | 0.0012446 m | 0.00127 m | 0.0012954 m | 0.0013208 m | 0.0013462 m | 0.0013716 m | 0.001397 m | 0.0014224 m | 0.0014478 m | 0.0014732 m | 0.0014986 m | 0.001524 m | 0.0015494 m | 0.0015748 m | 0.0016002 m | 0.0016256 m | 0.001651 m | 0.0016764 m | 0.0017018 m | 0.0017272 m | 0.0017526 m | 0.001778 m | 0.0018034 m | 0.0018288 m | 0.0018542 m | 0.0018796 m | 0.001905 m | 0.0019304 m | 0.0019558 m | 0.0019812 m | 0.0020066 m | 0.002032 m | 0.0020574 m | 0.0020828 m | 0.0021082 m | 0.0021336 m | 0.002159 m | 0.0021844 m | 0.0022098 m | 0.0022352 m | 0.0022606 m | 0.002286 m | 0.0023114 m | 0.0023368 m | 0.0023622 m | 0.0023876 m | 0.002413 m | 0.0024384 m | 0.0024638 m | 0.0024892 m | 0.0025146 m | 0.00254 m |
A thousandth of an inch is a derived unit of length in an inch-based system of units. Equal to 0.001 inches, it is normally referred to as a thou /ˈθaʊ/, a thousandth, or (particularly in the United States) a mil.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| thou | th | ≡ 1×10−3 in | ≡ 2.54×10−5 m | Imperial/US |
| thous | meters | thous | meters |
|---|---|---|---|
| 1 | ≡ 2.54E-5 | 4 | ≡ 0.0001016 |
| 1.5 | ≡ 3.81E-5 | 4.5 | ≡ 0.0001143 |
| 2 | ≡ 5.08E-5 | 5 | ≡ 0.000127 |
| 2.5 | ≡ 6.35E-5 | 5.5 | ≡ 0.0001397 |
| 3 | ≡ 7.62E-5 | 6 | ≡ 0.0001524 |
The metre (international spelling) or meter (American spelling) (from the Greek noun μέτρον, "measure") is the base unit of length in the International System of Units (SI). The SI unit symbol is m. The metre is defined as the length of the path travelled by light in a vacuum in 1/299 792 458 seconds.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| meter | m | ≡ Distance light travels in 1⁄299792458 of a second in vacuum. | ≡ 1 m | Metric system SI |
| meters | thous | meters | thous |
|---|---|---|---|
| 1 | ≡ 39370.078740157 | 4 | ≡ 157480.31496063 |
| 1.5 | ≡ 59055.118110236 | 4.5 | ≡ 177165.35433071 |
| 2 | ≡ 78740.157480315 | 5 | ≡ 196850.39370079 |
| 2.5 | ≡ 98425.196850394 | 5.5 | ≡ 216535.43307087 |
| 3 | ≡ 118110.23622047 | 6 | ≡ 236220.47244094 |
| thous | meters |
|---|---|
| 1 | ≡ 2.54 × 10-5 |
| 39,370.0787402 | ≡ 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 …) |