Convert inch (in) to millimeter (mm).
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Millimeter to Inch Converter (mm to in)
Convert millimeter (mm) to inch (in).Unit Converter · Length
Quick answer
1 millimeter (mm) is approximately equal to 0.03937008 inches (in). 1 inch (in) is equal to 25.4 millimeters (mm).
To convert mm to in, multiply the value in millimeters by 0.0393700787 (or divide by 25.4). For example, 10 mm = 0.39370079 in, and 100 mm = 3.93700787 in.
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Quick reference — millimeter to inch
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How to convert millimeters to inches
How many inches are in a millimeter? 1 millimeter is about 0.03937008 inches. This free mm to in converter and millimeter to inch calculator gives the answer instantly for any value, and the same conversion is also written as millimetre to inch and mm to inches.
To convert millimeter (mm) to inch (in), multiply the value in millimeters by 0.0393700787, or divide it by 25.4.
in = mm × 0.0393700787
- 1
Take the value in millimeters
For example, 25 mm.
- 2
Multiply by 0.0393700787
25 × 0.0393700787.
- 3
Read the answer in inches
25 mm = 0.98425197 in.
Millimeter to Inch conversion table
Common values from 1 to 1,000 millimeters converted to inches.
| Millimeter (mm) | Inch (in) |
|---|---|
| 1 mm | 0.03937008 in |
| 2 mm | 0.07874016 in |
| 3 mm | 0.11811024 in |
| 4 mm | 0.15748031 in |
| 5 mm | 0.19685039 in |
| 6 mm | 0.23622047 in |
| 7 mm | 0.27559055 in |
| 8 mm | 0.31496063 in |
| 9 mm | 0.35433071 in |
| 10 mm | 0.39370079 in |
| 15 mm | 0.59055118 in |
| 20 mm | 0.78740157 in |
| 25 mm | 0.98425197 in |
| Millimeter (mm) | Inch (in) |
|---|---|
| 30 mm | 1.18110236 in |
| 40 mm | 1.57480315 in |
| 50 mm | 1.96850394 in |
| 60 mm | 2.36220472 in |
| 70 mm | 2.75590551 in |
| 75 mm | 2.95275591 in |
| 80 mm | 3.1496063 in |
| 90 mm | 3.54330709 in |
| 100 mm | 3.93700787 in |
| 250 mm | 9.84251969 in |
| 500 mm | 19.68503937 in |
| 1,000 mm | 39.37007874 in |
About millimeters and inches
Millimeter (mm)
A millimeter (mm) is one thousandth of a meter. It is the smallest division on most rulers and tape measures.
Inch (in)
An inch (in) is defined as exactly 2.54 centimeters, and 12 inches make a foot. It is still widely used for screen sizes and for pipe and tyre dimensions.
mm to in: common questions
- How many inches are in 1 millimeter?
- 1 millimeter (mm) is approximately equal to 0.03937008 inches (in). In short: 1 mm ≈ 0.03937008 in.
- How do I convert millimeters to inches?
- To convert mm to in, multiply the value in millimeters by 0.0393700787 (or divide by 25.4). For example, 5 mm = 0.19685039 in.
- How do I convert inches to millimeters?
- To convert in to mm, multiply the value in inches by 25.4. Or open the Inch to Millimeter converter, which does it for you.
- What is 10 mm in in, and what is 100 mm?
- 10 mm = 0.39370079 in, and 100 mm = 3.93700787 in. The table above lists more values from 1 to 1,000.
- Is this mm to in converter accurate?
- Yes. It uses the exact conversion factor and shows results to as many as 8 decimal places, so you can rely on it for study, work and everyday measuring.
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