Millimeter to Inch
1 mm = 0.0393700787 in
How to convert millimeter to inch
Enter the value in millimeter (mm) above and the equivalent in inch (in) updates as you type. This conversion comes up when reading product specs from US websites while living in a metric country (TV sizes, lumber, pipe diameter).
Typical situations: planning road trips in countries that use a different system than your car navigation; DIY and construction: buying metric materials with imperial plans or the other way round; understanding running or cycling distances when following US training plans.
You can also convert in the other direction: Inch to Millimeter
Millimeter to Inch conversion table
| Millimeter (mm) | Inch (in) |
|---|---|
| 1 | 0.03937 |
| 2 | 0.07874 |
| 5 | 0.19685 |
| 10 | 0.393701 |
| 25 | 0.984252 |
| 50 | 1.968504 |
| 100 | 3.937008 |
Watch out for
- Mixing up nautical miles (1,852 m) with statute miles (1,609.344 m); aviation and shipping use nautical miles
- US survey feet differ slightly from international feet; irrelevant for daily life, but matters in land surveying
Frequently asked questions
How many inches is 1 millimeter?
1 millimeter = 0.03937 inches.
What is the formula to convert millimeter to inches?
The formula is: in = mm × 0.03937.
What is 10 millimeters in inches?
10 millimeters = 0.393701 inches.