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Length
Inches to Millimeters
Convert inches (in) to millimeters (mm). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 in = 25.4 mm
Inches to Millimeters Conversion Table
Common values, ready to copy:
| inches | millimeters |
|---|---|
| 1 in | 25.4 mm |
| 2 in | 50.8 mm |
| 5 in | 127 mm |
| 10 in | 254 mm |
| 25 in | 635 mm |
| 50 in | 1270 mm |
| 100 in | 2540 mm |
| 1,000 in | 25400 mm |
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Formula
millimeters = inches × 25.4
Length conversions use the SI definition: 1 inch is exactly 0.0254 meters and 1 mile is exactly 1,609.344 meters. The factor above is the exact ratio between inch and millimeter.
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