inches to mm Converter
Convert inches to mm instantly: 1 inches = 25.4 mm. Free converter with the formula, a reference table and FAQs — no sign-up.
| inches | mm |
|---|
How to convert inches to mm
Enter your value
Type the number of inches you want to convert into the left box. The result in mm appears instantly in the right box. You can also type into the right box to convert in the other direction.
Use the swap button
Click the ⇄ Swap button to reverse the conversion — mm to inches. Your current value carries across so you don't have to re-enter anything.
About inches and mm
inches and mm are common print measurements.
Worked examples: inches to mm
Multiply the inches value by 25.4 to get mm. A few quick examples:
- 5 inches × 25.4 = 127 mm
- 25 inches × 25.4 = 635 mm
- 250 inches × 25.4 = 6,350 mm
Related conversions
| inches | mm |
|---|---|
| 0.039 | 0.9906 |
| 0.1 | 2.54 |
| 0.25 | 6.35 |
| 0.5 | 12.7 |
| 1 | 25.4 |
| 2 | 50.8 |
Frequently asked questions
How do I convert inches to mm?
To convert inches to mm, multiply by 25.4. Or use the calculator above for instant results.
How many mm are in 1 inches?
1 inches equals 25.4 mm.
Is the inches to mm converter free?
Yes, the inches to mm converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.