Inch to Millimeter Converter
1 Inch = 25.4 Millimeter
To convert inchs to millimeters, multiply by 25.4.
Converting inches to millimeters is essential in machining, industrial design, and woodworking to adapt imperial measurements to global metric standards.
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Formula
mm = in × 25.399999994
To convert Inch to Millimeter, use the formula displayed above.
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Inch to Millimeter: Quick Reference Table
| Inch (in) | Millimeter (mm) |
|---|---|
| 0.001 | 0.0254 |
| 0.01 | 0.254 |
| 0.1 | 2.54 |
| 0.5 | 12.7 |
| 1 | 25.4 |
| 2 | 50.8 |
| 5 | 127 |
| 10 | 254 |
| 25 | 635 |
| 50 | 1270 |
| 100 | 2539.999999 |
| 250 | 6349.999998 |
| 500 | 12699.999997 |
| 1000 | 25399.999994 |
in to mm Formula and Examples
Direct Formula
mm = in × 25.399999994 Inverse Formula
in = mm × 0.03937 Mental Math Shortcut
Multiply the value by roughly 25.4 to calculate the equivalent amount in your head.
Common Inch to Millimeter Calculations
- 5 in = 127 mm
- 10 in = 254 mm
- 50 in = 1270 mm
- 100 in = 2539.999999 mm
- 500 in = 12699.999997 mm
How to Convert Inch to Millimeter
How many millimeters are in a inch?
1 Inch (in) is equal to 25.4 Millimeter (mm). To convert inchs to millimeters, multiply your value by 25.4.
How do I convert inch to millimeter?
To convert Inch to Millimeter, use the formula: Millimeter = Inch × 25.4. For example, 5 in = 127 mm.
What is the formula for in to mm?
The formula is: mm = in × 25.4. This is based on the exact SI conversion factor. Use our calculator above to convert any value instantly.