You don't need to convert inches to linear inches! "Linear inches" is just another way of saying "inches" when talking about length in a straight line.

Think of it like this:

* Inches: A standard unit of measurement for length.

* Linear inches: Describes a measurement of length along a straight line.

So, "1 inch" is the same as "1 linear inch."

If you're ever unsure, consider the context of the situation. If someone is asking for a measurement of length in a straight line, "linear inches" and "inches" are interchangeable.