mm to Inches Converter
Conversion formula
1 mm = 0.03937 in
Millimeters are used for precise sizes: drill bits, bolts, jewelry, phone thickness, camera lenses and rainfall. US hardware and tape measures are marked in fractions of an inch, so this page also shows the nearest 1/16 inch.
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mm
inches
0.3937 in
Full calculators:Length Converter
How to convert millimeters to inches
- 1
There are 25.4 millimeters in 1 inch, so divide by 25.4.
- 2
Example: 10 ÷ 25.4 = 0.3937 in.
mm to Inches conversion chart
| mm | Inches |
|---|---|
| 1 mm | 0.03937 in |
| 2 mm | 0.07874 in |
| 3 mm | 0.11811 in |
| 5 mm | 0.19685 in |
| 6 mm | 0.23622 in |
| 8 mm | 0.31496 in |
| 10 mm | 0.3937 in |
| 12 mm | 0.47244 in |
| 15 mm | 0.59055 in |
| 20 mm | 0.7874 in |
| 25 mm | 0.98425 in |
| 50 mm | 1.9685 in |
| 100 mm | 3.937 in |
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Frequently asked questions
How do I convert millimeters to inches?
There are 25.4 millimeters in 1 inch, so divide by 25.4. For example, 10 mm = 0.3937 in.
How many inches are in one millimeter?
One millimeter equals 0.03937 inches.
Is this length conversion exact?
Yes. Since 1959 the inch has been defined as exactly 2.54 cm and the foot as exactly 0.3048 m, so imperial and metric lengths convert with exact factors. Results here are rounded only for display.