Convert millimeters to inches
1 mm = 0.03937008 in. Change the amount below, or read the formula and the reference table further down.
1 millimeter equals
inches
1 mm = 0.03937008 in
The formula
Millimeters and inches both measure length from the same zero, so a single multiplier does the job.
in = mm × 0.0393700787
Going the other way? Convert inches to millimeters.
Millimeters to inches table
Common values, rounded for reading.
| Millimeters (mm) | Inches (in) |
|---|---|
| 1 | 0.03937 |
| 2 | 0.07874 |
| 3 | 0.11811 |
| 4 | 0.15748 |
| 5 | 0.19685 |
| 6 | 0.23622 |
| 7 | 0.275591 |
| 8 | 0.314961 |
| 9 | 0.354331 |
| 10 | 0.393701 |
| 15 | 0.590551 |
| 20 | 0.787402 |
| 25 | 0.984252 |
| 30 | 1.1811 |
| 40 | 1.5748 |
| 50 | 1.9685 |
| 75 | 2.9528 |
| 100 | 3.937 |
| 250 | 9.8425 |
| 500 | 19.685 |
| 1,000 | 39.3701 |
Questions people ask
- How many inches are in a millimeter?
- One millimeter equals 0.0393700787 inches.
- How do I convert millimeters to inches by hand?
- Multiply the number of millimeters by 0.0393700787. For a rough check, 0.039 is close enough for most everyday use.
- What is 1 millimeter in inches?
- 1 millimeter is 0.03937008 inches.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.