Millimeter to Inch Converter
Convert millimeters to inches with this free length converter. The exact relationship used on this page is 1 millimeter = 0.0393700787402 inches. Type any number — the result updates instantly, works on phones and desktops, and is ready to copy into homework, a spec sheet, or a shopping list.
Formula: Inch = Millimeter × 0.0393700787402
How to convert millimeters to inches
- Enter the value in millimeters in the converter.
- Read the equivalent amount in inches.
- Use the swap link if you need inch to millimeter instead.
- Check the table for common values without typing.
Worked examples
- 1 mm = 0.03937007874 in
- 5 mm = 0.1968503937 in
- 10 mm = 0.3937007874 in
- 25 mm = 0.9842519685 in
Conversion table
Common millimeters values converted to inches.
| mm | in |
|---|---|
| 1 | 0.03937007874 |
| 2 | 0.07874015748 |
| 3 | 0.1181102362 |
| 4 | 0.157480315 |
| 5 | 0.1968503937 |
| 6 | 0.2362204724 |
| 7 | 0.2755905512 |
| 8 | 0.3149606299 |
| 9 | 0.3543307087 |
| 10 | 0.3937007874 |
| 20 | 0.7874015748 |
| 50 | 1.968503937 |
| 100 | 3.937007874 |
| 250 | 9.842519685 |
| 500 | 19.68503937 |
| 1,000 | 39.37007874 |
About this conversion
Millimeter (mm) and Inch (in) are both length units. Length conversion is one of the most searched measurement tasks online. Bookmark this URL when you convert millimeters to inches often, then explore related pairs in the same category if you need a different target unit.
Need the other direction? Open the inch to millimeter converter.
FAQ
How many inches are in 1 millimeter?+
1 millimeter equals 0.0393700787402 inches.
What is the formula to convert millimeters to inches?+
Inch = Millimeter × 0.0393700787402
How do I convert millimeters to inches by hand?+
Multiply the millimeter value by 0.0393700787402. Example: 10 millimeters × 0.0393700787402 = 0.393700787402 inches.
Is this mm to in converter accurate?+
Yes. Linear conversions use internationally agreed factors relative to SI. Temperature and inverse fuel units use the standard offset or reciprocal formulas, not a guessed scale factor.