MM to Inches Converter
Convert millimeters to inches instantly: 1 in = 25.4 mm exactly. Formula, fraction tips and a mm to inches chart for tools, screws and drawings.
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How to use it
- Type a value in the millimetres box.
- The result in inches appears instantly.
- Type in the second box to convert the other way.
Formula
in = mm ÷ 25.4. Type in either box — the conversion works both ways.
MM to Inches: chart
| Millimetres (mm) | Inches (in) |
|---|---|
| 1 mm | 0.0394 in |
| 2 mm | 0.0787 in |
| 3 mm | 0.1181 in |
| 5 mm | 0.1969 in |
| 6 mm | 0.2362 in |
| 8 mm | 0.315 in |
| 10 mm | 0.3937 in |
| 12 mm | 0.4724 in |
| 15 mm | 0.5906 in |
| 20 mm | 0.7874 in |
| 25 mm | 0.9843 in |
| 25.4 mm | 1 in |
| 30 mm | 1.18 in |
| 50 mm | 1.97 in |
| 100 mm | 3.94 in |
Frequently asked questions
How many inches is 1 mm?
1 mm is 0.03937 inches. One inch is exactly 25.4 mm.
What is 10 mm in inches?
10 mm is 0.3937 in — slightly more than 3/8 in (0.375 in).
What is 6 mm in inches?
6 mm is 0.2362 in, close to 1/4 in (6.35 mm).
How do I convert mm to cm?
Divide by 10: 25.4 mm = 2.54 cm.