Inches to Millimeters
1 inch = 25.4 millimeters
Converter Calculator
1 Inches = 25.4 Millimeters
Explanation
Multiply inches by 25.4 because the international inch equals exactly 25.4 millimeters.
Common Conversion Values
| Inches | Millimeters |
|---|---|
| 0.1 | 2.54 |
| 0.25 | 6.35 |
| 0.5 | 12.7 |
| 1 | 25.4 |
| 2 | 50.8 |
| 5 | 127 |
| 10 | 254 |
| 25 | 635 |
| 50 | 1,270 |
| 100 | 2,540 |
How to use this hub
- Choose a converter family.
- If converting to/from grams from a volume unit, select an ingredient.
- For pure unit changes (volume↔volume or weight↔weight), use universal conversions.
If your conversion includes grams, you’ll choose an ingredient; otherwise you won’t.
Frequently Asked Questions
What defines this conversion?
The ratio follows the official international definitions.
Is the reverse conversion available?
Yes. Use the switch button or open the Millimeters to Inches hub to see the inverse output.
Can I use decimals?
Decimal inputs stay precise so fractional lengths remain accurate for calculators or reference tables.