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Convert inches to millimeters with our free online converter. Simply enter the value in in and instantly get the result in mm. One inch equals 25.4 millimeters. This tool runs entirely in your browser — no signup, no upload, no tracking.
1 in = 25.4 mm
Conversion Formula
in × 25.4 = mm
| inches (in) | millimeters (mm) |
|---|---|
| 1 | 25.4 |
| 5 | 127 |
| 10 | 254 |
| 25 | 635 |
| 50 | 1270 |
| 100 | 2540 |
| 500 | 12700 |
| 1000 | 25400 |
Convert inches to millimeters with our free online converter. Simply enter the value in in and instantly get the result in mm. One inch equals 25.4 millimeters. This tool runs entirely in your browser — no signup, no upload, no tracking.
The conversion factor from inch to millimeter is 25.4. This means that to convert any value from inches to millimeters, you simply multiply the value by 25.4. For example, 5 in equals 127 mm, and 100 in equals 2540 mm.
This converter is part of AHX's free online tools collection. All conversions are performed instantly in your browser — no data is sent to any server, no signup is required, and the tool works offline once the page has loaded.
1 inch equals 25.4 millimeters.
Multiply the value in in by 25.4. For example, 10 in × 25.4 = 254 mm.
Yes, this converter uses precise conversion factors and performs calculations in your browser for instant, accurate results.