Millimeters to Inches
Convert millimeters to inches instantly. The relationship is fixed: 1 mm = 0.0394 in (and 1 in = 25.4 mm). To go from millimeters to inches, multiply by 0.0394 (or divide by 25.4).
For example, 10 mm is 0.3937 in. Length conversions like this come up constantly — measuring height, screen and TV sizes, paper, furniture, and anything bought from a country that uses a different measurement system.
1 mm = 0.0394 in
ResultFull conversion table
| mm | in |
|---|---|
| 1 | 0.0394 |
| 2 | 0.0787 |
| 3 | 0.1181 |
| 5 | 0.1969 |
| 10 | 0.3937 |
| 15 | 0.5906 |
| 20 | 0.7874 |
| 25 | 0.9843 |
| 30 | 1.18 |
| 50 | 1.97 |
| 100 | 3.94 |
How to convert millimeters to inches
The formula is: in = mm × 0.0394. Take your amount in millimeters, multiply by 0.0394 (or divide by 25.4), and you have the result in inches. To reverse it, divide by 0.0394 (or multiply by 25.4).
Use the table below for the most common values at a glance, or the calculator for any exact amount.
Frequently asked questions
How many inches are in 1 mm?
1 mm equals 0.0394 in.
How many inches is 10 mm?
10 mm is 0.3937 in.
What's the formula for millimeters to inches?
Multiply millimeters by 0.0394: in = mm × 0.0394.
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