Live Demo - CSS Relative Units

Source Code

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>CSS Units</title>
    <style type="text/css">
      #topParaContent {
        font-size: 2.5em; /* 40px/16=2.5em */
      }
      #secondParaContent {
        font-size: 1.875em; /* 30px/16=1.875em */
      }
      #thirdParaContent {
        font-size: 0.875em; /* 14px/16=0.875em */
      }
    </style>
  </head>
  <body>
    <div class="container mt-5">
      <h1>CSS Unit Example</h1>
      <p id="topParaContent">First paragraph text content.</p>
      <p id="secondParaContent">Second paragraph text content</p>
      <p id="thirdParaContent">Third Paragraph text content.</p>
    </div>
    <!--/container-->
  </body>
</html>
Source Code

Source Code Output :Running
