Microinch to Mil/Thou Converter
Convert Microinch (µin) to Mil/Thou (mil) instantly. 1 µin = 0.001 mil.
Length Converter
31 units available
1 µin = 0.001 mil
Formula:
mil = µin × 0.001With your value: 1 µin = 0.001 mil
How big is that?
Everyday references on a logarithmic scale, all expressed in microinch so you can sanity-check the result.
Other Microinch to Mil/Thou conversions
Microinch to Mil/Thou Conversion Table
| Microinch (µin) | Mil/Thou (mil) |
|---|---|
| 0.5 | 0.0005 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 15 | 0.015 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
Mil/Thou to Microinch Conversion Table
| Mil/Thou (mil) | Microinch (µin) |
|---|---|
| 0.5 | 500 |
| 1 | 1,000 |
| 2 | 2,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 15 | 15,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
| 1000 | 1,000,000 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Microinch (µin)
Length
Traceable to the metre, defined by fixing the speed of light in vacuum at 299 792 458 m/s. Imperial lengths derive from the 1959 international yard (0.9144 m exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Mil/Thou (mil)
Length
Traceable to the metre, defined by fixing the speed of light in vacuum at 299 792 458 m/s. Imperial lengths derive from the 1959 international yard (0.9144 m exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Microinch to Mil/Thou
To convert from Microinch (µin) to Mil/Thou (mil), multiply the value by 0.001.
Formula: mil = µin × 0.001
Reverse: µin = mil × 1,000
Step-by-Step Example
- Start with your value in Microinch. For example: 5 µin
- Multiply by the conversion factor: 5 x 0.001
- The result is: 0.005 mil
About Microinch
The microinch (µin) is a unit of distance and length. One microinch equals 2.540000 × 10^-8 metres. UnitConvertLab converts it against every other length unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
Common uses: length calculations, engineering and science, education.
About Mil/Thou
A mil (or thou) is one thousandth of an inch, 25.4 micrometres. US manufacturing uses it for sheet, film and coating thickness.
Common uses: plastic film, PCB traces, coating thickness.
Frequently Asked Questions
How many Mil/Thou are in 1 Microinch?
There are exactly 0.001 Mil/Thou in 1 Microinch. This means the conversion factor from Microinch to Mil/Thou is 0.001.
What is the formula to convert Microinch to Mil/Thou?
The formula to convert Microinch to Mil/Thou is: mil = µin × 0.001. For example, to convert 10 Microinch to Mil/Thou, you would multiply 10 by 0.001.
What is a Microinch?
The microinch (µin) is a unit of distance and length. One microinch equals 2.540000 × 10^-8 metres. UnitConvertLab converts it against every other length unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.
What is a Mil/Thou?
A mil (or thou) is one thousandth of an inch, 25.4 micrometres. US manufacturing uses it for sheet, film and coating thickness.
What are the common uses of Microinch?
The Microinch is commonly used in length calculations, engineering and science, education.
Related Length Conversions
Cite this page
UnitConvertLab. (2026). Microinch to Mil/Thou converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/microinch-to-mil