Thou (Mils) to Nanometers (th → nm)
Formula
1 th = 25400 nmConversion Table
| th | nm |
|---|---|
| 0 | 0 |
| 1.0000 | 25,400 |
| 2.0000 | 50,800 |
| 3.0000 | 76,200 |
| 4.0000 | 101,600 |
| 5.0000 | 127,000 |
| 6.0000 | 152,400 |
| 7.0000 | 177,800 |
| 8.0000 | 203,200 |
| 9.0000 | 228,600 |
| 10.000 | 254,000 |
| 11.000 | 279,400 |
| 12.000 | 304,800 |
| 13.000 | 330,200 |
| 14.000 | 355,600 |
| 15.000 | 381,000 |
| 16.000 | 406,400 |
| 17.000 | 431,800 |
| 18.000 | 457,200 |
| 19.000 | 482,600 |
| th | nm |
|---|---|
| 20.000 | 508,000 |
| 21.000 | 533,400 |
| 22.000 | 558,800 |
| 23.000 | 584,200 |
| 24.000 | 609,600 |
| 25.000 | 635,000 |
| 26.000 | 660,400 |
| 27.000 | 685,800 |
| 28.000 | 711,200 |
| 29.000 | 736,600 |
| 30.000 | 762,000 |
| 31.000 | 787,400 |
| 32.000 | 812,800 |
| 33.000 | 838,200 |
| 34.000 | 863,600 |
| 35.000 | 889,000 |
| 36.000 | 914,400 |
| 37.000 | 939,800 |
| 38.000 | 965,200 |
| 39.000 | 990,600 |
| th | nm |
|---|---|
| 40.000 | 1,016,000 |
| 41.000 | 1,041,400 |
| 42.000 | 1,066,800 |
| 43.000 | 1,092,200 |
| 44.000 | 1,117,600 |
| 45.000 | 1,143,000 |
| 46.000 | 1,168,400 |
| 47.000 | 1,193,800 |
| 48.000 | 1,219,200 |
| 49.000 | 1,244,600 |
| 50.000 | 1,270,000 |
| 51.000 | 1,295,400 |
| 52.000 | 1,320,800 |
| 53.000 | 1,346,200 |
| 54.000 | 1,371,600 |
| 55.000 | 1,397,000 |
| 56.000 | 1,422,400 |
| 57.000 | 1,447,800 |
| 58.000 | 1,473,200 |
| 59.000 | 1,498,600 |
| th | nm |
|---|---|
| 60.000 | 1,524,000 |
| 61.000 | 1,549,400 |
| 62.000 | 1,574,800 |
| 63.000 | 1,600,200 |
| 64.000 | 1,625,600 |
| 65.000 | 1,651,000 |
| 66.000 | 1,676,400 |
| 67.000 | 1,701,800 |
| 68.000 | 1,727,200 |
| 69.000 | 1,752,600 |
| 70.000 | 1,778,000 |
| 71.000 | 1,803,400 |
| 72.000 | 1,828,800 |
| 73.000 | 1,854,200 |
| 74.000 | 1,879,600 |
| 75.000 | 1,905,000 |
| 76.000 | 1,930,400 |
| 77.000 | 1,955,800 |
| 78.000 | 1,981,200 |
| 79.000 | 2,006,600 |
Thou (Mils) to Nanometers Conversion
Converting Thou (Mils) (th) to Nanometers (nm) is a common length conversion. 1 th equals 25,400 nm. For example, 100 th is equal to 2,540,000 nm.
Quick Mental Math: Thou (Mils) to Nanometers
Reference a linear anchor between thou and nanometers; use one memorable value.
Why is converting Thou (Mils) to Nanometers tricky?
Magnitude or direction confusion between thou and nanometers is the primary error source.
Quick Reference Values
1 th = 25,400 nm. 5 th = 127,000 nm. 10 th = 254,000 nm. 25 th = 635,000 nm. 50 th = 1,270,000 nm. 100 th = 2,540,000 nm.
What is Thou (Mils)?
Thou (Mils) (th) is a unit of length. A thou is a unit of length equal to one thousandth of an inch (0.001 in). It corresponds to exactly 25.4 micrometers (µm) in SI units. The thou is widely used in engineering and manufacturing for precise measurements of thickness and diameter [nist-si-guide]. The thou emerged in the 19th century in British engineering as a convenient subdivision of the inch. Its use was formalized to provide accuracy in machining and toolmaking, reflecting industrial measurement needs [nist-si-guide]. The thou remains common in the United States, Canada, and the UK for mechanical engineering and machining tolerances. It is frequently used in the automotive and aerospace industries for component specifications [nist-si-guide].
What is Nanometers?
Nanometers (nm) is a unit of length. The nanometer is a unit of length equal to one billionth of a meter (10⁻⁹ m). It measures dimensions at the atomic and molecular scale and is defined precisely within the International System of Units (SI). Nanometers are essential in fields such as optics, semiconductor manufacturing, and nanotechnology [bipm-si-brochure]. The nanometer was introduced during the 20th century with advances in microscopy and quantum physics. It became standardized as an SI submultiple to measure extremely small lengths for scientific and industrial applications [bipm-si-brochure]. Nanometers are used globally in semiconductor fabrication, optics, and material science. Industries such as computer chip manufacturing specify process nodes in nanometers, reflecting international standards [nist-cuu].
Common Misspellings
People often search for this conversion using these alternate spellings: thow, thouh, thous, nanometer, nanometre, nanomiter, nanomiter. All of these refer to the Thou (Mils) to Nanometers conversion.