Millimeters to Inches
Convert millimeters to inches instantly. The formula is in = mm × 0.03937008, and the reference table below covers the values people look up most.
1 mm equals
0.03937 in
in = mm × 0.03937008
Formula
in = mm × 0.03937008
Millimeters to Inches table
| Millimeters | Inches |
|---|---|
| 1 mm | 0.03937 in |
| 2 mm | 0.07874 in |
| 5 mm | 0.19685 in |
| 10 mm | 0.39370 in |
| 20 mm | 0.78740 in |
| 50 mm | 1.96850 in |
| 100 mm | 3.93701 in |
| 200 mm | 7.87402 in |
| 500 mm | 19.68504 in |
| 1,000 mm | 39.37008 in |
Frequently asked questions
How many inches are in a millimeter?
One millimeter equals 0.03937 inches. The conversion is a single multiplication, so 10 mm is 0.39370 in.
What is the formula to convert millimeters to inches?
in = mm × 0.03937008. Enter any value above and the result updates as you type, with no rounding until the final display.
How do I convert inches back to millimeters?
Use the reverse conversion: divide instead of multiplying, or open the inches to millimeters page for the same tool the other way round.
Is this millimeters to inches conversion exact?
The underlying factor is the internationally defined one, so the only rounding happens when the result is displayed. The table below shows values rounded to 5 decimal places.