CSS border-radius Property

Description

The border-radius property shorthand sets all four border-*-radius properties. If values are given before and after the slash, then the values before the slash set the horizontal radius and the values after the slash set the vertical radius. If there is no slash, then the values set both radii equally. The four values for each radii are given in the order top-left, top-right, bottom-right, bottom-left. If bottom-left is omitted it is the same as top-right. If bottom-right is omitted it is the same as top-left. If top-right is omitted it is the same as top-left.

Initial value

See individual properties

Applies to

All elements

Inherited

No

Computed value

See individual properties

Animatable

Yes

JavaScript syntax

object.style.borderRadius

Interactive Demo

border-radius: 15px;

border-radius: 5px 20px;

border-radius: 10% 5% 20% 40%;

border-radius: 40% / 10%;

border-radius: 10% 25% / 60% 30%;

Syntax

border-radius: [ <length> | <percentage> ]{1,4} [ / [ <length> | <percentage> ]{1,4} ]?

Values

• <length>Denotes the size of the circle radius or the semi-major and semi-minor axes of the ellipsis. It can be expressed in any unit allowed by the CSS <length> data types. Negative values are invalid.
• <percentage>Denotes the size of the circle radius, or the semi-major and semi-minor axes of the ellipsis, using percentage values. Percentages for the horizontal axe refer to the width of the box, percentages for the vertical axe refer to the height of the box. Negative values are invalid.

Example

<div class="border">This is an example of the border-radius property using a red solid border 2px in width and a 10px radius for top-left, 5px for top-right, 15px for bottom-right and 20px for bottom-left.</div>

.border {
   border: 2px solid red;
   border-radius: 10px 5px 15px 20px;
   margin: 20px;
   padding: 20px;
}

Browser Support

The following table will show you the current browser support for the CSS border-radius property.

Desktop
12	4	4	10.5	5

Tablets / Mobile
18	4	11	4.2	1	37

Last updated by CSSPortal on: 1st January 2024