Comparing em to Pixels : measurement « Style Basics « HTML / CSS






  1. HTML / CSS
  2. Style Basics
  3. measurement

Comparing em to Pixels

  
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
                      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en'>
    <head>
        <meta http-equiv='Content-Type' content='text/html; charset=UTF-8' />
        <title>Em Measurement Comparison to Pixels</title>
        <style type='text/css'>
            p {
                background: pink;
                border: 1px solid black;
            }
            p#em-measurement {
                width: 12em;
                padding: 1em;
            }
            p#px-measurement {
                width: 192px;
                padding: 16px;
            }
        </style>
    </head>
    <body>
        <p id='em-measurement'>
            This paragraph is 12em wide, with a 1em padding.
        </p>
        <p id='px-measurement'>
            This paragraph is 192 pixels wide, with 16 pixels of
            padding.
        </p>
    </body>
</html>








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6.Different measures
7.em is relative to the font size
8.Relative size font-size: .75em
9.width: size an element by assigning pixels, ems, a percentage, or another fixed measurement to width.
10.Percentages are more flexible because they can scale to the viewport.
11.width:100% stretches an element to the width of its parent.
12.Units of Length and Percentage
13.Absolute vs. Relative Measurements
14.one inch tall
15.inch measurement
16.font-size with various measurements
17.This font is 24 pixels tall and this div is 3 ems tall
18.The body's border is 1em thick
19.font-size: 1in
20.inch vs pixel
21.percentage measurement width
22.A negative margin
23.This paragraph has a 1 pixel thick, solid black border around it.
24.This font is 1.2 smaller than the default size, or pixels.
25.em measurement
26.ex measurement
27.inch measurement 2
28.inch vs pixels
29.Em Measurement Comparison to Pixels
30.percentage measurement
31.12 pixel base