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Distance conversions are essential for travel, running or driving distances, and international measurements. Kilometers and meters are the metric standard, while miles, feet, and yards remain the reference in the US and UK for everyday distances and road signs.
The inch is a unit of length used mainly in the United States and the United Kingdom, notably for screen diagonals, pipe diameters, wheel rims, or DIY projects. Its value has been precisely fixed since 1959: 1 inch = 25.4 mm exactly. Here is an inch-to-millimeter conversion table for the most searched values:
| Inch | Millimeter |
|---|---|
| 1 inch | 25.4 mm |
| 2 inch | 50.8 mm |
| 3 inch | 76.2 mm |
| 4 inch | 101.6 mm |
| 5 inch | 127 mm |
| 6 inch | 152.4 mm |
| 7 inch | 177.8 mm |
| 8 inch | 203.2 mm |
| 9 inch | 228.6 mm |
| 10 inch | 254 mm |
| 11 inch | 279.4 mm |
| 12 inch | 304.8 mm |
| 1/4 inch | 6.35 mm |
| 1/2 inch | 12.7 mm |
| 3/4 inch | 19.05 mm |
To convert the other way (millimeter to inch), simply divide the value in mm by 25.4. For an instant conversion with a decimal value (for example 3.5 inch), use the converter above.