📏 in to mm — Inch to Millimeter Converter
Convert length units instantly — meters, feet, inches, centimeters, kilometers, miles, and more.
All Inch conversions
| Unit | Name | Value |
|---|---|---|
| m | Meter | 0.0254 |
| km | Kilometer | 0.0000254 |
| cm | Centimeter | 2.54 |
| mm | Millimeter | 25.4 |
| ft | Foot | 0.083333333 |
| yd | Yard | 0.027777778 |
| mi | Mile | 0.000015782828 |
| nmi | Nautical Mile | 0.000013714903 |
Related Length conversions
About Inch to Millimeter Conversion
The Inch (in) and the Millimeter (mm) are both units of length. Converting between them is straightforward using the formula above.
Formula: 1 in = 25.4 mm
This converter uses internationally recognized conversion factors. All calculations are performed client-side in your browser — no data is sent to any server.
Frequently Asked Questions
How do I convert Inch to Millimeter?
Use the converter above — enter your value in Inch and the result appears instantly in Millimeter. The formula is: 1 in = 25.4 mm
How many Millimeter are in 100 Inch?
100 in = 2540 mm
What is 1 Inch in Millimeter?
1 in = 25.4 mm
Is this Inch to Millimeter converter free?
Yes — Unitafy is completely free, requires no signup, and works instantly in your browser.