To convert Inches to Millimeters, We need Conversion factors

conversion factor of 1 Inches (in) = 25.4 Millimeters (mm).

Now, that we have value of 1 Inches in Millimeters, we can convert any value of Inches to Millimeters.

We need to multiply the 25.4 Millimeters by the value of Inches we want to convert.