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Set how much a flex item will grow relative to the rest of the flex items with CSS
The CSS flex-grow property controls how much a flex item will grow relative to the rest of the flex items inside a flex container. When there's extra space available, this property determines how that space is distributed among flex items.
Syntax
selector {
flex-grow: number;
}
Possible Values
| Value | Description |
|---|---|
0 |
Default value. Item will not grow. |
number |
A positive number that defines the growth factor relative to other flex items. |
Example: Basic Flex Grow
The following example demonstrates how flex-grow distributes extra space. The third item (Q3) has a higher grow value, making it larger than other items −
<!DOCTYPE html>
<html>
<head>
<style>
.mycontainer {
display: flex;
background-color: orange;
padding: 10px;
gap: 5px;
}
.mycontainer > div {
background-color: white;
text-align: center;
line-height: 40px;
font-size: 20px;
min-width: 50px;
border-radius: 5px;
}
</style>
</head>
<body>
<h2>Quiz Items with Flex Grow</h2>
<div class="mycontainer">
<div style="flex-grow: 1">Q1</div>
<div style="flex-grow: 1">Q2</div>
<div style="flex-grow: 3">Q3</div>
<div style="flex-grow: 1">Q4</div>
<div style="flex-grow: 1">Q5</div>
</div>
</body>
</html>
An orange container with five white rounded boxes labeled Q1-Q5. The Q3 box is noticeably larger than the others, taking up three times more space due to its flex-grow: 3 value.
Example: Equal Distribution
When all items have the same flex-grow value, they grow equally to fill the available space −
<!DOCTYPE html>
<html>
<head>
<style>
.equal-container {
display: flex;
background-color: #f0f0f0;
padding: 10px;
gap: 5px;
margin-top: 20px;
}
.equal-container > div {
background-color: #4CAF50;
color: white;
text-align: center;
line-height: 40px;
flex-grow: 1;
border-radius: 5px;
}
</style>
</head>
<body>
<div class="equal-container">
<div>Item 1</div>
<div>Item 2</div>
<div>Item 3</div>
<div>Item 4</div>
</div>
</body>
</html>
Four green boxes of equal width labeled "Item 1" through "Item 4" fill the container evenly, each taking up exactly 25% of the available space.
Conclusion
The flex-grow property is essential for creating flexible layouts where items can expand to fill available space. Use higher values to make items grow larger relative to their siblings.
Updated on: 2026-03-15T13:23:49+05:30
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