Millimeters to Inches formula
inches = millimeters × 0.0393701
Multiply the number of millimeters by 0.0393701 to get inches. To go the other way, multiply by 25.4 instead, or use the inches to mm converter.
Millimeters to Inches conversion table
Common mm to inches values, rounded for reading. The converter above keeps full precision.
| Millimeters | Inches |
|---|---|
| 1 mm | 0.0393701 in |
| 2 mm | 0.0787402 in |
| 3 mm | 0.11811 in |
| 4 mm | 0.15748 in |
| 5 mm | 0.19685 in |
| 10 mm | 0.393701 in |
| 15 mm | 0.590551 in |
| 20 mm | 0.787402 in |
| 25 mm | 0.984252 in |
| 50 mm | 1.9685 in |
| 75 mm | 2.95276 in |
| 100 mm | 3.93701 in |
| 250 mm | 9.84252 in |
| 500 mm | 19.685 in |
| 1,000 mm | 39.3701 in |
Worked example
To convert 10 mm to inches, multiply by 0.0393701: the result is 0.393701 in. International inch, foot, yard and mile definitions are exact. One inch equals exactly 2.54 centimeters.
Frequently asked questions
How many inches are in a millimeter?
One millimeter equals 0.0393701 inches (1 mm = 0.0393701 in).
What is 10 millimeters in inches?
10 mm converts to 0.393701 in. Enter any other value in the converter above to see it recalculated instantly.
How do I convert inches back to millimeters?
Reverse the calculation: one inch equals 25.4 millimeters. You can also swap the units in the converter or open the inches to mm page.
Related length conversions
Need a different pair? Open the full length converter to choose any two units.