How to make an element width: 100% minus padding?

Question

I have an html input.

The input has padding: 5px 10px; I want it to be 100% of the parent div\'s width(which is fluid).

However using widt

Answer 1

Here is the recommendation from codeontrack.com, which has good solution examples:

Instead of setting the width of the div to 100%, set it to auto, and be sure, that the

is set to display: block (default for

).