Convert inches to millimeters instantly. Free, fast, and accurate.
To convert inches to millimeters, use the formula: mm = in × 25.4. This is the standard conversion ratio used worldwide.
| Inches (in) | Millimeters (mm) |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 20 in | 508 mm |
| 50 in | 1270 mm |
| 100 in | 2540 mm |
| 500 in | 12700 mm |
| 1000 in | 25400 mm |
The inches and millimeters are units used to measure length. This converter provides accurate, instant results based on internationally recognized conversion standards.
Use the formula: mm = in × 25.4. Or simply type a value in the calculator above for instant results.
Click the swap button (⇄) between the two input fields. The units will instantly switch positions, allowing you to convert in the opposite direction without leaving the page.
Yes, our converter uses internationally standardized conversion ratios for accurate results to multiple decimal places.