Length and Area
cmtomil
Convert centimetres (cm) to mils (mil).
Factor1 cm = 393.7008 mil
Converter
cm
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mil
Rendered to 6 significant figures.
Formula
Formula
mil = cm × 393.7008
Multiply any value in centimetres by 393.7008 to obtain the value in mils.
Worked example
Convert 1 cm to mil.
- 01Start with 1 cm.
- 02Multiply by the conversion factor: 1 × 393.7008 = 393.701 mil.
Result1 cm = 393.701 mil
Conversion table
| cm | mil |
|---|---|
| 1 | 393.7 |
| 2 | 787.4 |
| 5 | 1968.5 |
| 10 | 3937 |
| 20 | 7874 |
| 50 | 19685 |
| 100 | 39370 |
| 200 | 78740 |
| 500 | 1.9685e+5 |
| 1000 | 3.9370e+5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from cm to mil?
1 cm equals 393.7008 mil. To convert, multiply the value in centimetres by 393.7008.
How do I convert 1 cm to mil?
1 cm = 393.701 mil. For any value, multiply by 393.7008.
How do I convert mil back to cm?
Divide by the same factor — or equivalently, multiply by 0.00254. So 1 mil = 0.00254 cm.
When would I need to convert centimetre 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).