Inches to Millimeters
変換 inches to mm (in to mm) directly in your browser. Type a value and get the result instantly — no rounding surprises, no data leaves your device.
How to convert inches to mm
One inch equals 25.4 millimeters. To convert, multiply the number of inches by 25.4:
mm = inches × 25.4 例: 1 in = 25.4 mm
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Inches to Millimeters conversion table
| Inches | Millimeters |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 3 in | 76.2 mm |
| 4 in | 101.6 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 20 in | 508 mm |
| 25 in | 635 mm |
| 50 in | 1270 mm |
| 100 in | 2540 mm |
よくある質問
How many mm are in a inch?
One inch is exactly 25.4 millimeters.
What is the formula to convert inches to mm?
Multiply the value in inches by 25.4 to get the result in mm.
Is this converter free and private?
Yes. It is free, needs no signup, and runs entirely in your browser.