Length and Area
miltoin
Convert mils (mil) to inches (in).
Factor1 mil = 0.001 in
Converter
mil
Accepts numbers or expressions, e.g. 150 + 14.7
Result
in
Rendered to 6 significant figures.
Formula
Formula
in = mil × 0.001
Multiply any value in mils by 0.001 to obtain the value in inches.
Worked example
Convert 1000 mil to in.
- 01Start with 1000 mil.
- 02Multiply by the conversion factor: 1000 × 0.001 = 1 in.
Result1000 mil = 1 in
Conversion table
| mil | in |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 200 | 0.2 |
| 500 | 0.5 |
| 1000 | 1 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mil to in?
1 mil equals 0.001 in. To convert, multiply the value in mils by 0.001.
How do I convert 1 mil to in?
1 mil = 0.001 in. For any value, multiply by 0.001.
How do I convert in back to mil?
Divide by the same factor — or equivalently, multiply by 1000. So 1 in = 1000 mil.
When would I need to convert mil (thousandth of an inch) to inch?
Length conversions appear in piping, layout, and mechanical drawings — particularly when reconciling imperial fittings or instrument lengths with metric plant drawings.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).