Convert Millimeters to Inches
20 mm = 0.787402 in
in = mm ÷ 25.4Convert millimeters to inches instantly — type in either box and it works both ways.
How to convert millimeters to inches
To convert millimeters to inches, divide the number of millimeters by 25.4.
in = mm ÷ 25.4
Example: convert 20 mm to in
- 20 ÷ 25.4 = 0.787402
- 20 mm = 0.787402 in
1 mm = 0.03937 in and 1 in = 25.4 mm.
Millimeters to Inches conversion chart
| Millimeters (mm) | Inches (in) |
|---|---|
| 1 mm | 0.03937 in |
| 2 mm | 0.07874 in |
| 5 mm | 0.19685 in |
| 10 mm | 0.393701 in |
| 12 mm | 0.472441 in |
| 20 mm | 0.787402 in |
| 25 mm | 0.984252 in |
| 50 mm | 1.9685 in |
| 100 mm | 3.937 in |
| 500 mm | 19.685 in |
| 1,000 mm | 39.3701 in |
Frequently asked questions
How do you convert millimeters to inches?
To convert millimeters to inches, divide the number of millimeters by 25.4. The formula is in = mm ÷ 25.4.
How many inches are in one millimeter?
1 mm = 0.03937 in.
How do I convert inches back to millimeters?
Use the reverse formula: mm = in × 25.4. For example 1 in = 25.4 mm.
Is this converter free and accurate?
Yes. It is free, uses exact internationally defined conversion factors, and runs in your browser — nothing you type is sent anywhere.
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