Length and Area
intomil
Convert inches (in) to mils (mil).
Factor1 in = 1000 mil
Converter
in
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mil
Rendered to 6 significant figures.
Formula
Formula
mil = in × 1000
Multiply any value in inches by 1000 to obtain the value in mils.
Worked example
Convert 1 in to mil.
- 01Start with 1 in.
- 02Multiply by the conversion factor: 1 × 1000 = 1000 mil.
Result1 in = 1000 mil
Conversion table
| in | mil |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 50 | 50000 |
| 100 | 1.0000e+5 |
| 200 | 2.0000e+5 |
| 500 | 5.0000e+5 |
| 1000 | 1.0000e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from in to mil?
1 in equals 1000 mil. To convert, multiply the value in inches by 1000.
How do I convert 1 in to mil?
1 in = 1000 mil. For any value, multiply by 1000.
How do I convert mil back to in?
Divide by the same factor — or equivalently, multiply by 0.001. So 1 mil = 0.001 in.
When would I need to convert inch to mil (thousandth of an 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).