Convert millimeters to inches (fraction) instantly. Enter a value below, or use the formula and reference table further down the page.
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How to convert millimeters to inches (fraction)
Multiply the value by 0.03937007874.
in = mm × 0.03937007874Example: 10 mm = 0.3937 in.
Millimeters to Inches (fraction) conversion table
| Millimeters (mm) | Inches (fraction) (in) |
|---|---|
| 1 mm | 0.0394 in |
| 2 mm | 0.0787 in |
| 3 mm | 0.1181 in |
| 4 mm | 0.1575 in |
| 5 mm | 0.1969 in |
| 10 mm | 0.3937 in |
| 15 mm | 0.5906 in |
| 20 mm | 0.7874 in |
| 25 mm | 0.9843 in |
| 50 mm | 1.9685 in |
| 100 mm | 3.937 in |
Frequently asked questions
How many inches (fraction) is 1 millimeter?
1 millimeter equals 0.0394 inches (fraction).
What is the formula to convert mm to in?
To convert mm to in, multiply the value by 0.03937007874. The full formula is: in = mm × 0.03937007874.
How do I convert inches (fraction) back to millimeters?
Use the same calculator above and type your value into the inches (fraction) field instead — it converts in both directions. Or use the reverse formula: mm = in ÷ 0.03937007874.
Is the mm to in conversion exact?
The conversion factor used here (0.03937007874) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.