Inches to Millimeters (mm) Conversion Calculator
Convert inches to millimeters instantly with our online calculator, formula, and conversion table.
Inch to Millimeter Conversion
Converted Value
0Formula: 1 inch = 25.4 mm
Convert Inches to Millimeter (mm)
Both inches and millimeters are units of length. The inch system is most commonly used in the United States, Canada, and the United Kingdom. While the metric system is used in most other parts of the world. To make it easier, we have created this free inch to mm conversion tool so you can make the calculation online.
In general, we use the formula to convert inches to millimeters:
Formula:
- 1 inch = 25.4 mm
- Millimeters = Inches × 25.4
Example #1: Convert 5 inches to mm:
5 in = 5 in × 25.4 mm/in = 127 mm
Example #2: Convert 15 inches to mm:
15 in = 15 in × 25.4 mm/in = 381 mm
Download the Inch to MM Conversion PDF Chart
We also prepared a printable PDF conversion chart so you can print and keep it on your desk for quick reference.
Common Inch to Millimeter Conversion Table
| Inch (Fraction) | Inch (Decimal) | Milimeters (mm) |
|---|---|---|
| 1/8″ | 0.1250 | 3.18 mm |
| 1/4″ | 0.2500 | 6.35 mm |
| 1/2″ | 0.5000 | 12.70 mm |
| 3/4″ | 0.7500 | 19.05 mm |
| 7/8″ | 0.8750 | 22.23 mm |
| 15/16″ | 0.9375 | 23.81 mm |
| 1″ | 1.0000 | 25.40 mm |
| 1 1/2″ | 1.50 | 38.10 mm |
| 2″ | 2.0000 | 50.80 mm |
| 2 1/4″ | 2.2500 | 57.15 mm |
| 3″ | 3.0000 | 76.20 mm |
| 3 1/8″ | 3.1250 | 79.38 mm |
| 4″ | 4.0000 | 101.60 mm |
| 4 3/8″ | 4.3750 | 111.13 mm |
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