Mils to Inches
Convert mils to inches instantly. 1 mil = 0.001 in. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert mils to inches
To convert mils to inches, divide by 1,000 (multiply by 0.001). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
in = mil × 0.001
Mils to Inches conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Mils | Inches |
|---|---|
| 1 mil | 0.001 in |
| 2 mil | 0.002 in |
| 3 mil | 0.003 in |
| 5 mil | 0.005 in |
| 10 mil | 0.01 in |
| 20 mil | 0.02 in |
| 25 mil | 0.025 in |
| 50 mil | 0.05 in |
| 100 mil | 0.1 in |
| 500 mil | 0.5 in |
| 1,000 mil | 1 in |
What is a mil?
One thousandth of an inch. Standard for PCB traces, foil and coating thickness.
What is a inch?
Exactly 25.4 mm since the 1959 international yard and pound agreement.
The formula
in = mil × 0.001
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Mils to Inches
- Type the number of mils you want to convert.
- Read the result in inches straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked inches to mils page.
Mils to Inches — frequently asked questions
How many inches are in a mil?
One mil equals 0.001 in. in = mil × 0.001
What is the formula to convert mils to inches?
The formula is in = mil × 0.001. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert inches back to mils?
Divide instead of multiplying: one inch is 1,000 mil. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this mils to inches free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the mils to inches.
- mils to inches
- how many inches in a mil
- mil2in
- mils in inches
- mils to inches converter
- convert mils to inches
- mils to inch
- mils to in
About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error