Mil/Thou to Inch Converter
Quick answer
To convert Mil/Thous to inches, multiply by 0.001 (or divide by 1,000). Therefore, 1 Mil/Thou (mil) equals 0.001 inches (in).
Formula: in = mil × 0.001. Worked example: 10 mil = 0.01 in.
Convert Mil/Thou (mil) to Inch (in) online with our free unit converter. In length, 1 mil = 0.001 in. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Mil/Thou to Inch
- Step 1 — start with the formula. in = mil × 0.001
- Step 2 — substitute your figure. 10 mil × 0.001
- Step 3 — read the result. 10 mil = 0.01 in
- Step 4 — check it in reverse. mil = in × 1,000 returns 10 mil, which matches the figure you started with.
Length Converter
31 units available
1 mil = 0.001 in
Formula:
in = mil × 0.001With your value: 1 mil = 0.001 in
How big is that?
Everyday references on a logarithmic scale, all expressed in mil/thou so you can sanity-check the result.
Other Mil/Thou to Inch conversions
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 |
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 |
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.
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
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
How to Convert Mil/Thou to Inch
To convert from Mil/Thou (mil) to Inch (in), multiply the value by 0.001.
Formula: in = mil × 0.001
Reverse: mil = in × 1,000
Step-by-Step Example
- Start with your value in Mil/Thou. For example: 5 mil
- Multiply by the conversion factor: 5 x 0.001
- The result is: 0.005 in
Mil/Thou and Inch Relationship
This calculation facilitates standardized conversion between recognized units of length. Since 1 Mil/Thou represents a fraction of a Inch (1 Inch ≈ 1,000 Mil/Thous), the Inch is the larger measurement interval. Understanding the relationship between Mil/Thou and Inch is essential for accurate calculations in physics, engineering, commerce, and daily applications.
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 of Mil/Thou: plastic film, PCB traces, coating thickness.
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 of Inch: screen sizes, construction, clothing.
Frequently Asked Questions
- How many inches are in 1 Mil/Thou?
- There are exactly 0.001 inches in 1 Mil/Thou. This means the conversion factor from Mil/Thou to Inch is 0.001.
- What is the formula to convert Mil/Thou to Inch?
- The formula to convert Mil/Thou to Inch is: in = mil × 0.001. For example, to convert 10 Mil/Thous to inches, you would multiply 10 by 0.001.
- 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 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 are the common uses of Mil/Thou?
- The Mil/Thou is commonly used in plastic film, PCB traces, coating thickness.
Related Length Conversions
Cite this page
UnitConvertLab. (2026). Mil/Thou to Inch converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/mil-to-inch