1 millimeter = 0.0393701 inches
Convert millimeters to inches.
Both directions on one page — swap the units and the whole thing runs backwards.
Type a value, or “5cm to in”
1 row could not be read rows could not be read
The formula
in = mm × 0.0393701
Worked through with a real value: 10 millimeters = 0.393701 inches.
Going the other way: mm = in × 25.4, so 1 inch = 25.4 millimeters.
What each unit is
- millimeter mm
- A thousandth of a metre, and the working unit of engineering drawings, rainfall and camera focal lengths.
- inch in
- Exactly 2.54 centimetres since the international agreement of 1959. Screens, pipes, paper and tyres are still sized in them.
Where these come from
- 1 millimeter = 0.001 meters
- 1 inch = 0.0254 meters
Every other number on this page is computed from those, and each category is pinned to conversions worked out by hand from the units' primary definitions before it ships.
Conversion tables
| millimeters (mm) | inches (in) |
|---|---|
| 1 | 0.0393701 |
| 2 | 0.0787402 |
| 3 | 0.11811 |
| 4 | 0.15748 |
| 5 | 0.19685 |
| 6 | 0.23622 |
| 7 | 0.275591 |
| 8 | 0.314961 |
| 9 | 0.354331 |
| 10 | 0.393701 |
| 20 | 0.787402 |
| 25 | 0.984252 |
| 50 | 1.9685 |
| 75 | 2.95276 |
| 100 | 3.93701 |
| inches (in) | millimeters (mm) |
|---|---|
| 1 | 25.4 |
| 2 | 50.8 |
| 3 | 76.2 |
| 4 | 101.6 |
| 5 | 127 |
| 6 | 152.4 |
| 7 | 177.8 |
| 8 | 203.2 |
| 9 | 228.6 |
| 10 | 254 |
| 20 | 508 |
| 25 | 635 |
| 50 | 1270 |
| 75 | 1905 |
| 100 | 2540 |
Questions
How many inches are in a millimeter?
1 millimeter = 0.0393701 inches.
How do I convert millimeters to inches?
Use in = mm × 0.0393701. For example, 10 millimeters = 0.393701 inches.
How many millimeters are in one inch?
1 inch = 25.4 millimeters.
What is 10 millimeters in inches?
10 millimeters = 0.393701 inches.
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