1 mm = 0.039370078740157 in
1 Millimeter (mm) = 0.039370078740157 Inch (in).
If you want to reverse convert, use Inch → Millimeter. 1 in = 25.4 mm. You can also explore the full Length converter page for more cross conversions.
Conversion formula
Millimeter to Inch formula: value in in = value in mm × 0.039370078740157.
Inch to Millimeter formula: value in mm = value in in × 25.4.
How to convert Millimeter to Inch
To convert Millimeter to Inch, multiply the value in mm by 0.039370078740157. This gives the result in in.
For example, 1 mm = 0.039370078740157 in and 10 mm = 0.39370078740157 in.
What is Millimeter?
Millimeter (mm): One thousandth of a metre. Screw diameters, sheet thicknesses and small dimensions on technical drawings commonly use this finer scale. 1 mm = 0.1 cm = 0.001 m.
What is Inch?
Inch (in): Used for screen diagonals, pipe sizes and component dimensions. A screen’s inch size refers to its diagonal rather than its width. 1 in = 2.54 cm = 25.4 mm.
FAQ
How many inch are in 1 millimeter?
There are 0.039370078740157 in in 1 mm.
Why can conversion results differ slightly?
Check the unit definition and rounding. US and imperial measures can differ; rounding intermediate values can also change the final digits.
How do I convert millimeter to inch?
Multiply the value in mm by 0.039370078740157 to get the value in in.
Millimeter → other Length units
- 1 millimeter → meter = 0.001 meter
- 1 millimeter = 1.0E-6 kilometer
- 1 millimeter → decimeter = 0.01 decimeter
- 1 millimeter → centimeter = 0.1 centimeter
- 1 millimeter → micrometer = 1000 micrometer
- 1 millimeter = 1000000 nanometer
- 1 millimeter = 1000000000 picometer
- 1 millimeter = 5.3995680345572E-7 nautical mile
- 1 millimeter = 6.2137119223733E-7 mile
- 1 millimeter → fathom = 0.00054680664916885 fathom
- 1 millimeter → yard = 0.0010936132983377 yard
- 1 millimeter → feet = 0.0032808398950131 feet
- 1 millimeter → inch = 0.039370078740157 inch
- 1 millimeter → hand = 0.0098425196850394 hand
- 1 millimeter = 6.6845871222684E-15 astronomical unit
- 1 millimeter = 1.0570008340246E-19 lightyear
- 1 millimeter = 3.2407792894443E-20 parsec
Millimeter → Inch Table
The table below shows common values from Millimeter to Inch and the reverse direction for quick reference.
| mm | in | Rounded |
|---|---|---|
| 1 mm | 0.039370078740157 in | 0.0394 |
| 2 mm | 0.078740157480315 in | 0.0787 |
| 3 mm | 0.11811023622047 in | 0.1181 |
| 4 mm | 0.15748031496063 in | 0.1575 |
| 5 mm | 0.19685039370079 in | 0.1969 |
| 10 mm | 0.39370078740157 in | 0.3937 |
| 12 mm | 0.47244094488189 in | 0.4724 |
| 15 mm | 0.59055118110236 in | 0.5906 |
| 20 mm | 0.78740157480315 in | 0.7874 |
| 25 mm | 0.98425196850394 in | 0.9843 |
| 30 mm | 1.1811023622047 in | 1.1811 |
| 40 mm | 1.5748031496063 in | 1.5748 |
| 50 mm | 1.9685039370079 in | 1.9685 |
| 75 mm | 2.9527559055118 in | 2.9528 |
| 100 mm | 3.9370078740157 in | 3.9370 |
| 200 mm | 7.8740157480315 in | 7.8740 |
| 250 mm | 9.8425196850394 in | 9.8425 |
| 500 mm | 19.685039370079 in | 19.6850 |
| 750 mm | 29.527559055118 in | 29.5276 |
| 1000 mm | 39.370078740157 in | 39.3701 |
| 2500 mm | 98.425196850394 in | 98.4252 |
| 5000 mm | 196.85039370079 in | 196.8504 |
| 10000 mm | 393.70078740157 in | 393.7008 |
Inch → Millimeter Table
| in | mm | Rounded |
|---|---|---|
| 1 in | 25.4 mm | 25.4000 |
| 2 in | 50.8 mm | 50.8000 |
| 3 in | 76.2 mm | 76.2000 |
| 4 in | 101.6 mm | 101.6000 |
| 5 in | 127 mm | 127.0000 |
| 10 in | 254 mm | 254.0000 |
| 12 in | 304.8 mm | 304.8000 |
| 15 in | 381 mm | 381.0000 |
| 20 in | 508 mm | 508.0000 |
| 25 in | 635 mm | 635.0000 |
| 30 in | 762 mm | 762.0000 |
| 40 in | 1016 mm | 1016.0000 |
| 50 in | 1270 mm | 1270.0000 |
| 75 in | 1905 mm | 1905.0000 |
| 100 in | 2540 mm | 2540.0000 |
| 200 in | 5080 mm | 5080.0000 |
| 250 in | 6350 mm | 6350.0000 |
| 500 in | 12700 mm | 12700.0000 |
| 750 in | 19050 mm | 19050.0000 |
| 1000 in | 25400 mm | 25400.0000 |
| 2500 in | 63500 mm | 63500.0000 |
| 5000 in | 127000 mm | 127000.0000 |
| 10000 in | 254000 mm | 254000.0000 |
Inch → Millimeter
The reverse value is 1 in = 25.4 mm.