Converters
Inches to Millimeters Converter
Convert Inches (in) to Millimeters (mm) instantly — with formula and table.
Inches → Millimeters
Millimeters (mm)
25.4
Convert Inches to Millimeters
To convert inches to millimeters, multiply the inches value by 25.4. For example, 1 in = 25.4 mm.
Inches to Millimeters conversion table
| in | mm |
|---|---|
| 1 | 25.4 |
| 2 | 50.8 |
| 5 | 127 |
| 10 | 254 |
| 20 | 508 |
| 50 | 1,270 |
| 100 | 2,540 |
Frequently asked questions
How many millimeters in 1 inches?
1 in = 25.4 mm.
What is the formula to convert in to mm?
To convert inches to millimeters, multiply the inches value by 25.4.
Is this in to mm converter free and private?
Yes — it's free, needs no sign-up, and runs entirely in your browser.