CSS border-top-right-radius Property

The CSS border-top-right-radius defines the round shape of the top right corner of the element.

This property is one of the CSS3 properties.

There are three kinds of rounding. It can be a circle or an ellipse, or the value is 0, the corner is square. If you use background image or color, it will be clipped at the border. The process of clipping is defined by the value of background-clip property.

The property has two values: length and percentage. The border-top-right-radius property specifies the horizontal and vertical radii that define the rounded upper-right corner for a border box. When only one value is given, that value specifies both horizontal and vertical radius of the ellipse. If there are two values, the first one sets the horizontal radius and the second one sets the vertical radius. Percentages for the horizontal radii refer to the width of the box, percentages for the vertical radius refer to the height of the box. Negative values are not allowed.

Initial Value 0
Applies to All elements. It also applies to ::first-letter.
Inherited No.
Animatable Yes. Top right border is animatable.
Version CSS3
DOM Syntax object.style.borderTopRightRadius = "25px";

Syntax

border-top-right-radius: length | % | initial | inherit;

Let’s try an example where only one value is used. It defines both top border and right border of the ellipse.

Example of the border-top-right-radius property:

<!DOCTYPE html>
<html>
  <head>
    <title>Title of the document</title>
    <style>
      div {
        height: 40px;
        background: #666;
        border: 4px solid #000000;
        border-top-right-radius: 35px;
      }
    </style>
  </head>
  <body>
    <h2>Border-top-right-radius example.</h2>
    <div></div>
  </body>
</html>

In the following example, the first one defines the top border of the ellipse, and the second one represents the right border of the ellipse.

Result

CSS border-top-right-radius Property

Example of the border-top-right-radius property with two values:

<!DOCTYPE html>
<html>
  <head>
    <title>Title of the document</title>
    <style>
      div {
        height: 40px;
        background: #666;
        border: 4px solid #000000;
        border-top-right-radius: 35px 10px;
      }
    </style>
  </head>
  <body>
    <h2>Border-top-right-radius example.</h2>
    <div></div>
  </body>
</html>

Example of the border-top-right-radius property in percentages:

<!DOCTYPE html>
<html>
  <head>
    <title>Title of the document</title>
    <style>
      div {
        height: 40px;
        background: #1c87c9;
        border: 4px solid #000000;
        border-top-right-radius: 60% 30%;
      }
    </style>
  </head>
  <body>
    <h2>Border-top-right-radius example.</h2>
    <div></div>
  </body>
</html>

Values

Value Description Play it
length Defines the round shape of the top-left corner. Play it »
% Defines the round shape of the top-left corner in %. Play it »
initial Sets the property to its default value. Play it »
inherit Inherits the property from its parent element.

Browser support

chrome firefox safari opera
4.0+ 4.0+ 5.0+ 10.5+

Practice Your Knowledge

What does the CSS property 'border-top-right-radius' do?

Quiz Time: Test Your Skills!

Ready to challenge what you've learned? Dive into our interactive quizzes for a deeper understanding and a fun way to reinforce your knowledge.

Do you find this helpful?