Inch to Mil/Thou Converter
Convert Inch (in) to Mil/Thou (mil) instantly. 1 in = 1,000 mil.
Length Converter
31 units available
1 in = 1,000 mil
Formula:
mil = in × 1,000With your value: 1 in = 1,000 mil
How big is that?
Everyday references on a logarithmic scale, all expressed in inch so you can sanity-check the result.
Other Inch to Mil/Thou conversions
Inch to Mil/Thou Conversion Table
| Inch (in) | Mil/Thou (mil) |
|---|---|
| 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 |
Mil/Thou to Inch Conversion Table
| Mil/Thou (mil) | Inch (in) |
|---|---|
| 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 |
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.
Inch (in)
Length
1 inch = 25.4 mm exactly, fixed by the 1959 international yard and pound agreement.
Source: International Yard and Pound Agreement of 1959; NIST Federal Register Notice 59-5442
US, UK, Canada, Australia, New Zealand, South Africa · 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 Inch to Mil/Thou
To convert from Inch (in) to Mil/Thou (mil), multiply the value by 1,000.
Formula: mil = in × 1,000
Reverse: in = mil × 0.001
Step-by-Step Example
- Start with your value in Inch. For example: 5 in
- Multiply by the conversion factor: 5 x 1,000
- The result is: 5,000 mil
About Inch
The inch is an imperial unit equal to 1/12 of a foot or 2.54 centimeters. It is widely used in the US and UK for small measurements.
Fun Fact: The inch was historically defined as the width of a man's thumb.
Common uses: screen sizes, construction, clothing.
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 Inch?
There are exactly 1,000 Mil/Thou in 1 Inch. This means the conversion factor from Inch to Mil/Thou is 1,000.
What is the formula to convert Inch to Mil/Thou?
The formula to convert Inch to Mil/Thou is: mil = in × 1,000. For example, to convert 10 Inch to Mil/Thou, you would multiply 10 by 1,000.
What is a Inch?
The inch is an imperial unit equal to 1/12 of a foot or 2.54 centimeters. It is widely used in the US and UK for small measurements.
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 Inch?
The Inch is commonly used in screen sizes, construction, clothing.
Related Length Conversions
Cite this page
UnitConvertLab. (2026). Inch to Mil/Thou converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/inch-to-mil