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Inches to Millimeters Converter
Use this free in to mm converter for exact results: 1 in = 25.4 mm. The conversion table below covers the most common values.
Inches to Millimeters Converter
How to convert inches to millimeters
Multiply the number of inches by 25.4: mm = in × 25.4. For example, 10 in × 25.4 = 254 mm. To go the other way, multiply by 0.0393700787.
Inches to Millimeters conversion table
| Inches | Millimeters |
|---|---|
| 0.1 in | 2.54 mm |
| 0.5 in | 12.7 mm |
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 3 in | 76.2 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 15 in | 381 mm |
| 20 in | 508 mm |
| 25 in | 635 mm |
| 50 in | 1,270 mm |
| 75 in | 1,905 mm |
| 100 in | 2,540 mm |
| 250 in | 6,350 mm |
| 500 in | 12,700 mm |
| 1,000 in | 25,400 mm |
Frequently asked questions
How many millimeters are in a inch?
There are 25.4 millimeters in one inch.
How do I convert millimeters back to inches?
Use the reverse converter: 1 mm = 0.0393700787 in.