W3.CSS - Grids

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W3.CSS provides a 12 column fluid responsive grid.

It uses the w3-row and w3-col style classes to define rows and columns respectively.

Sr. No. Class Name & Description
1

w3-row

Specifies a padding-less container to be used for responsive columns. This class is mandatory for responsive classes to be fully responsive.
2

w3-col

Specifies a column with sub-classes

w3-col has several sub-classes meant for different types of screens.

Columns for Small Screen Devices

Here is a list of column-level styles for small screen devices, typically smartphones.

Sr. No. Class Name & Description
1

s1

Defines 1 of 12 columns with width as 08.33%.
2

s2

Defines 2 of 12 columns with width as 16.66%.
3

s3

Defines 3 of 12 columns with width as 25.00%.
4

s4

Defines 4 of 12 columns with width as 33.33%.
5

s12

Defines 12 of 12 columns with width as 100%. Default class for small screen phones.

Columns for Medium Screen Devices

Here is a list of column-level styles for medium screen devices, typically tablets.

Sr. No. Class Name & Description
1

m1

Defines 1 of 12 columns with width as 08.33%.
2

m2

Defines 2 of 12 columns with width as 16.66%.
3

m3

Defines 3 of 12 columns with width as 25.00%.
4

m4

Defines 4 of 12 columns with width as 33.33%.
5

m12

Defines 12 of 12 columns with width as 100%. Default class for medium screen phones.

Columns for Large Screen Devices

Here is a list of column-level styles for large screen devices, typically laptops.

Sr. No. Class Name & Description
1

|1

Defines 1 of 12 columns with width as 08.33%.
2

|2

Defines 2 of 12 columns with width as 16.66%.
3

|3

Defines 3 of 12 columns with width as 25.00%.
4

|4

Defines 4 of 12 columns with width as 33.33%.
5

|12

Defines 12 of 12 columns with width as 100%. Default class for large screen devices.

Usage

Each subclass determines the number of columns of the grid to be used based on the type of a device. Consider the following HTML snippet.

<div class = "w3-row">
   <div class = "w3-col s2 m4 l3">
      <p>This text will use 2 columns on a small screen, 4 on a medium screen, and 3 on a large screen.</p>
   </div>
</div>

Default columns to be used are 12 on a device if a sub-class is not mentioned in the class attribute of an HTML element.

Example

w3css_grids.htm

Live Demo 
<html>
   <head>
      <title>The W3.CSS Grids</title>
      <meta name = "viewport" content="width = device-width, initial-scale = 1">
      <link rel = "stylesheet" href = "https://www.w3schools.com/lib/w3.css">
   </head>

   <body>
      <header class = "w3-container w3-teal">
         <h2>Mobile First Design Demo</h2>
         <p class = "w3-large">Resize the window to see the effect!</p>
      </header>
      <div class = "w3-row">
         <div class = "w3-col m1 w3-center w3-grey">1</div>
         <div class = "w3-col m1 w3-center">2</div>
         <div class = "w3-col m1 w3-center w3-grey">3</div>
         <div class = "w3-col m1 w3-center">4</div>
      
         <div class = "w3-col m1 w3-center w3-grey">5</div>
         <div class = "w3-col m1 w3-center">6</div>
         <div class = "w3-col m1 w3-center w3-grey">7</div>
         <div class = "w3-col m1 w3-center">8</div>
      
         <div class = "w3-col m1 w3-center w3-grey">9</div>
         <div class = "w3-col m1 w3-center">10</div>
         <div class = "w3-col m1 w3-center w3-grey">11</div>
         <div class = "w3-col m1 w3-center">12</div>
      </div>
      
      <div class = "w3-row">
         <div class = "w3-col w3-container m4 l3 w3-yellow">
            <p>This text will use 12 columns on a small screen, 4 on a medium screen (m4), and 3 on a large screen (l3).</p>
         </div>
      
         <div class = "w3-col w3-container s4 m8 l9">
            <p>This text will use 4 columns on a small screen (s4), 8 on a medium screen (m8), and 9 on a large screen (l9).</p>
         </div>
      </div>
   </body>
</html>

Result

Verify the result.

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