Convert Inch (in) to Millimeter (mm)
Please provide values below to convert Inch (in) to Millimeter (mm).Length Converter
Convert from
Convert to
**Formula:
Discover Other Unit Converters
Try Other Length Converters
Angstrom to CentimeterAngstrom to FootAngstrom to InchAngstrom to KilometerAngstrom to MeterAngstrom to MicrometerAngstrom to MillimeterAngstrom to NanometerAngstrom to PicometerAstronomical Unit to AngstromAstronomical Unit to CentimeterAstronomical Unit to FootAstronomical Unit to KilometerAstronomical Unit to Light YearAstronomical Unit to MeterAstronomical Unit to Mile
Updated on September 1, 2025
You can use our Inch (in) to Millimeter (mm) conversion calculator as a reliable and efficient tool to simplify length conversions. It is designed for professionals, students, and anyone who needs a quick and accurate result. Conversion of Inch (in) to Millimeter (mm) is crucial in Distance related measurements. You can avoid the risk of manual calculation errors and save valuable time using our Inch (in) to Millimeter (mm) converter.About Inch (in) to Millimeter (mm) Conversion Calculator
Written By
Nadiba Rahman
Reviewed by
Mrinmoy Roy
Share This Post
URL copied!
Relation Between Inch (in) and Millimeter (mm)
Let me explain to you about the relation between Inch in and Millimeter (mm) first before moving to the conversion process. Because it’s essential to grasp what these units represent.What is Inch (in)?
An inch is a unit of length equal to 1/12 of a foot or 2.54 centimeters. Inch (in) is a unit of length measurement which is commonly used in Distance. Commonly used in the Imperial system for measuring small objects, screens, and textiles. Widely accepted in the US, UK, and Canada. Convenient for personal and industrial use..What is Millimeter (mm)?
Inch (in) is another unit of length measurement that is used in Nanoengineering. A millimeter is a unit of length equal to 10−3 meters.. Commonly used in the Imperial system for measuring small objects, screens, and textiles. Widely accepted in the US, UK, and Canada. Convenient for personal and industrial use..How to Convert Millimeter (mm)?
The conversion between Inch (in) and Millimeter (mm) follows a simple formula:Inch = Inch × 25.4
Where, 25.4 is the value that allows you to convert between Inch (in) and Millimeter (mm).
So,
1 Millimeter = 25.4 Inch
And, 1 Inch = 1/25.4 Millimeter
Examples of Converting Inch (in) to Millimeter (mm)
To convert any value from Inch (in) to Millimeter (mm), simply multiply the amount of Inch (in) by the conversion factor:1 Millimeter = 25.4 Inch
For example, if you want to convert 5 Inch into Millimeter and the conversion factor is 25.4, then:
5 Inch = 5 x 25.4 Millimeter
Inch (in) to Millimeter (mm) Conversion Chart
Here’s a quick reference chart for common conversions between Inch (in) and Millimeter (mm)| Inch (in) | Millimeter (mm) |
|---|---|
| 2 Inch (in) | 50.8 Millimeter (mm) |
| 2.5 Inch (in) | 63.5 Millimeter (mm) |
| 3 Inch (in) | 76.19999999999999 Millimeter (mm) |
| 3.5 Inch (in) | 88.89999999999999 Millimeter (mm) |
| 4 Inch (in) | 101.6 Millimeter (mm) |
| 4.5 Inch (in) | 114.3 Millimeter (mm) |
| 5 Inch (in) | 127 Millimeter (mm) |
| 5.5 Inch (in) | 139.7 Millimeter (mm) |
| 6 Inch (in) | 152.39999999999998 Millimeter (mm) |
| 6.5 Inch (in) | 165.1 Millimeter (mm) |
How 1 Inch (in) Converts to Other length Units
See the relation between Inch (in) and other length related measurement units:| 1 Inch(in) | 254000000.000000 Angstrom (Å) |
| 1 Inch(in) | 0.000000 Astronomical Unit (au) |
| 1 Inch(in) | 0.000137 Cables |
| 1 Inch(in) | 2.540000 Centimeter (cm) |
| 1 Inch(in) | 0.254000 Decimeter (dm) |
| 1 Inch(in) | 0.022222 Ells (ells) |
| 1 Inch(in) | 21.945600 Ems (ems) |
| 1 Inch(in) | 0.013889 Fathom |
| 1 Inch(in) | 0.083333 Foot (ft) |
| 1 Inch(in) | 0.000126 Furlong |
| 1 Inch(in) | 0.250000 Hand |
| 1 Inch(in) | 0.000254 Hectometer (hm) |
| 1 Inch(in) | 0.000025 Kilometer (km) |
| 1 Inch(in) | 0.000000 Light Year (ly) |
| 1 Inch(in) | 0.025400 Meter (m) |
| 1 Inch(in) | 25400.000000 Micrometer (µm) |
| 1 Inch(in) | 1000.000000 Mil (mil) |
| 1 Inch(in) | 0.000016 Mile (mi) |
| 1 Inch(in) | 25400000.000000 Nanometer (nm) |
| 1 Inch(in) | 0.000000 Parsec (pc) |
| 1 Inch(in) | 25400000000.000000 Picometer (pm) |
| 1 Inch(in) | 1000.000000 Thou |
| 1 Inch(in) | 0.027778 Yard (yd) |
Features of Our Inch (in) to Millimeter (mm) Conversion Calculator
Our Inch in to Millimeter (mm) converter is more than just a basic converter. Here's what makes it stand out:Output Precision Control
You can control how precise your conversion results are. From settings, you can adjust decimal places from 0 to 12 places.Customizable Rounding Options
You can control the output rounding options based on your necessity. You can turn the rounding mode on or off, and select between Ceiling or Floor rounding to match your needs.Multiple Number Formats
Display your results the way you want:- Standard format (e.g. 12.345245)
- Scientific notation (e.g. 1.23452e+1)
- Engineering format (e.g. 1.23452 × 10^1)