Understanding CSS Absolute and Relative Units
CSS Absolute Units
The absolute length units are fixed in relation to each other. These units are used when the output format is already known. Following are some of the Absolute Length Units −
| Sr.No | Unit & Description |
|---|
| 1 | cm
centimeters
|
| 2 | mm
millimeters
|
| 3 | in
inches (1in = 96px = 2.54cm)
|
| 4 | px *
pixels (1px = 1/96th of 1in)
|
| 5 | pt
points (1pt = 1/72 of 1in)
|
| 6 | pc
picas (1pc = 12 pt) |
Example
Let us now see an example −
Live Demo
<!DOCTYPE html>
<html>
<head>
<style>
.demo {
text-decoration: overline underline;
text-decoration-color: blue;
font-size: 0.3in;
}
</style>
</head>
<body>
<h1>Details</h1>
<p class="demo">Examination Center near ABC College.</p>
<p class="demo2">Exam begins at 9AM.</p>
</body>
</html>Output
CSS Relative Units
Relative length units in CSS is used to specify a length relative to another length property.
Relative to the x-height of the current font
| Sr.no | Unit & Description |
|---|
| 1 | em
Relative to the font-size of the element i.e 4em means 4 times the size of the current font.
|
| 2 | ex
Relative to the x-height of the current font
|
| 3 | ch
Relative to width of the 0
|
| 4 | rem
Relative to font-size of the root element
|
| 5 | vw
Relative to 1% of the width of the viewport*
|
| 6 | vh
Relative to 1% of the height of the viewport*
|
| 7 | vmin
Relative to 1% of viewport's* smaller dimension
|
| 8 | vmax
Relative to 1% of viewport's* larger dimension
|
| 9 | %
Relative to the parent element
|
Example
Let us see an example using Relative Length Units −
Live Demo
<!DOCTYPE html>
<html>
<head>
<style>
.demo {
text-decoration: overline underline;
text-decoration-color: blue;
font-size: 1.4em;
}
</style>
</head>
<body>
<h1>Details</h1>
<p class="demo">Examination Center near ABC College.</p>
<p class="demo2">Exam begins at 9AM.</p>
</body>
</html>Output
Published on 30-Dec-2019 15:46:08
