How to convert Millimeters to Inches
To convert millimeters to inches, multiply by 0.039370079. For example, 5 mm × 0.039370079 = 0.19685039 in.
Millimeters to Inches conversion table
| Millimeters (mm) | Inches (in) |
|---|---|
| 0.25 | 0.009843 |
| 0.5 | 0.019685 |
| 1 | 0.03937 |
| 2 | 0.07874 |
| 3 | 0.11811 |
| 5 | 0.19685 |
| 10 | 0.393701 |
| 15 | 0.590551 |
| 20 | 0.787402 |
| 25 | 0.984252 |
| 50 | 1.968504 |
| 75 | 2.952756 |
| 100 | 3.937008 |
| 250 | 9.84252 |
| 500 | 19.685039 |
| 1000 | 39.370079 |
About the units
Millimeters (mm) — one thousandth of a meter, the standard unit in engineering drawings and manufacturing.
Inches (in) — exactly 2.54 centimeters, used for screen sizes, tools and clothing in the US and UK.
Frequently asked questions
How many inches are in one millimeter?
One millimeter equals 0.039370079 inches.
What is the formula to convert millimeters to inches?
Multiply the value in millimeters by 0.039370079. For example, 10 mm × 0.039370079 = 0.39370079 in.
How do I convert inches back to millimeters?
Divide by 0.039370079 — or multiply by 25.4. You can also type directly in the second box of the converter above.
Is this converter accurate?
Yes. It uses the internationally defined conversion factors (for example, 1 inch = 2.54 cm exactly and 1 pound = 0.45359237 kg exactly) and shows up to 10 significant digits.
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