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Millimeter to Inch
Convert millimeter (mm) to inch (in) — with the exact factor, a quick-reference table and a free converter that works offline.
1 mm = 0.03937008 in
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Conversion table
| Millimeter (mm) | Inch (in) |
|---|---|
| 1 mm | 0.03937008 in |
| 2 mm | 0.07874016 in |
| 5 mm | 0.1968504 in |
| 10 mm | 0.3937008 in |
| 20 mm | 0.7874016 in |
| 50 mm | 1.968504 in |
| 100 mm | 3.937008 in |
| 500 mm | 19.68504 in |
How the conversion works
Both units measure length. One millimeter equals exactly 0.03937008 in, so multiply by that factor to convert.
FAQ
How many inchs in a millimeter?
1 mm = 0.03937008 in.
How do I convert millimeter to inch?
Multiply the millimeter value by 0.03937008. For example, 10 mm × 0.03937008 = 0.3937008 in.
Where does the factor come from?
The conversion factor is defined in BIPM SI Brochure; both units are length units converted through meter.
Related conversions
Conversion factors: BIPM SI Brochure. Computed by the same engine that powers the app.
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