Millimeter to Inch Converter
1 millimeter is about 0.03937007874 inches. Convert millimeters (mm) to inches (in) below: type a value and the result updates as you type.
mm to in calculator
Result
Millimeter to Inch conversion
1 mm ≈ 0.03937007874 inone millimeter in inches
1 in = 25.4 mmone inch in millimeters
Millimeter (mm): One thousandth of a meter.
Inch (in): Exactly 0.0254 meters (international inch).
Source:Millimeter: SI Brochure, 9th edition (BIPM, 2019); Inch: International yard and pound agreement (1959)
How to convert millimeters to inches
To convert millimeters to inches, divide the number of millimeters by 25.4.
Formula
in = mm ÷ 25.4
Examples
- 5 mm = 5 ÷ 25.4 ≈ 0.1968503937 in
- 25 mm = 25 ÷ 25.4 ≈ 0.9842519685 in
- 100 mm = 100 ÷ 25.4 ≈ 3.937007874 in
Millimeter to Inch conversion table
| Millimeter (mm) | Inch (in) |
|---|---|
| 0.1 mm | 0.003937007874 in |
| 0.5 mm | 0.01968503937 in |
| 1 mm | 0.03937007874 in |
| 2 mm | 0.07874015748 in |
| 3 mm | 0.1181102362 in |
| 5 mm | 0.1968503937 in |
| 10 mm | 0.3937007874 in |
| 20 mm | 0.7874015748 in |
| 25 mm | 0.9842519685 in |
| 50 mm | 1.968503937 in |
| 100 mm | 3.937007874 in |
| 250 mm | 9.842519685 in |
| 500 mm | 19.68503937 in |
| 1000 mm | 39.37007874 in |
Values rounded to 10 significant digits where needed.
Common conversions
Frequently asked questions
- How many inches are in one millimeter?
- One millimeter is about 0.03937007874 inches.
- How do I convert inches to millimeters?
- To convert inches to millimeters, multiply the number of inches by 25.4. The formula is mm = in × 25.4.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 25.4 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a millimeter or a inch?
- A inch is 25.4 times larger than a millimeter. In other words, a millimeter is about 0.03937007874 of a inch.