Inches to Millimetres Converter
Convert inches to millimetres (in to mm) instantly. 1 inches equals 25.4 millimetres and 1 millimetres equals 0.03937 inches. Use the swap button to convert the other way.
- Free
- No signup
- Private: runs in your browser
- Works on mobile
Inches to Millimetres Converter tool
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Quick conversion table
| Inches | Millimetres |
|---|---|
| 1 | 25.4 |
| 2 | 50.8 |
| 5 | 127 |
| 10 | 254 |
| 25 | 635 |
| 50 | 1,270 |
| 100 | 2,540 |
| 1,000 | 25,400 |
How to use Inches to Millimetres Converter
- Type the value you want to convert.
- Choose the "from" and "to" units, or press Swap units.
- Read the converted value and copy it.
Why use DocConvertPRO?
- Free to use with no signup or watermark.
- Everything runs in your browser. Your input is not uploaded.
- Works on phones, tablets and computers.
- Made for Indian users: rupees, lakh/crore formats and local use cases.
About this tool
Multiply the value in inches by 25.4 to get millimetres.
Frequently asked questions
How many millimetres are in 1 inches?
1 inches = 25.4 millimetres.
How do I convert in to mm?
Multiply the value in inches by 25.4 to get millimetres.
How do I convert mm back to in?
Use the swap button above or open the Millimetres to Inches converter. 1 millimetres = 0.03937 inches.
Is this converter accurate?
It uses exact or internationally standard conversion factors and shows up to 10 significant digits.