CSS How to set div height 100% minus nPx

Martijn_40676 0
Viewed 235574

I have a wrapper div which contans 2 divs next to each other. Above this container I have a div that contains my header. The wrapper div must be 100% minus the height of the header. The header is about 60 px. This is fixed. So my question is: how do I set the height my wrapper div to be 100% minus the 60 px?

<div id="header"></div>
<div id="wrapper">
  <div id="left"></div>
  <div id="right"></div>
</div>
height css
11 Answers

Here is a working css, tested under Firefox / IE7 / Safari / Chrome / Opera.

* {margin:0px;padding:0px;overflow:hidden}
div {position:absolute}
div#header {top:0px;left:0px;right:0px;height:60px}
div#wrapper {top:60px;left:0px;right:0px;bottom:0px;}
div#left {top:0px;bottom:0px;left:0px;width:50%;overflow-y:auto}
div#right {top:0px;bottom:0px;right:0px;width:50%;overflow-y:auto}

"overflow-y" is not w3c-approved, but every major browser supports it. Your two divs #left and #right will display a vertical scrollbar if their content is too high.

For this to work under IE7, you have to trigger the standards-compliant mode by adding a DOCTYPE : 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
            "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title></title>
<style type="text/css">
 *{margin:0px;padding:0px;overflow:hidden}
 div{position:absolute}
 div#header{top:0px;left:0px;right:0px;height:60px}
 div#wrapper{top:60px;left:0px;right:0px;bottom:0px;}
 div#left{top:0px;bottom:0px;left:0px;width:50%;overflow-y:auto}
 div#right{top:0px;bottom:0px;right:0px;width:50%;overflow-y:auto}
</style>
</head>
<body>
<div id="header"></div>
<div id="wrapper">
  <div id="left"><div style="height:1000px">high content</div></div>
  <div id="right"></div>
</div>
</body>

user_1191950

If you need to support IE6, use JavaScript so manage the size of the wrapper div (set the position of the element in pixels after reading the window size). If you don't want to use JavaScript, then this can't be done. There are workarounds but expect a week or two to make it work in every case and in every browser.

For other modern browsers, use this css:

position: absolute;
top: 60px;
bottom: 0px;
Aaron_Digulla_340880 
div {
    height: 100%;
    height: -webkit-calc(100% - 60px);
    height: -moz-calc(100% - 60px);
    height: calc(100% - 60px);
}

Make sure while using less 

height: ~calc(100% - 60px);

Otherwise less is no going to compile it correctly

user_83920850

This doesn't exactly answer the question as posed, but it does create the same visual effect that you are trying to achieve.

<style>

body {
  border:0;
  padding:0;
  margin:0;
  padding-top:60px;
}

#header {
  position:absolute;
  top:0;
  height:60px;
  width:100%;
}

#wrapper {
  height:100%;
  width:100%;
}
</style>
Noel_Walters_530300

Use an outer wrapper div set to 100% and then your inner wrapper div 100% should be now relative to that.

I thought for sure this used to work for me, but apparently not:

<html>
<body>
<div id="outerwrapper" style="border : 1px solid red ; height : 100%">
<div id="header" style="border : 1px solid blue ; height : 60px"></div>
<div id="wrapper"  style="border : 1px solid green ; height : 100% ; overflow : scroll ;">
  <div id="left" style="height : 100% ; width : 50% ; overflow : scroll; float : left ; clear : left ;">Some text 

on the left</div>
  <div id="right" style="height : 100% ; width 50% ; overflow : scroll; float : left ;">Some Text on the 

right</div>
</div>
</div>
</body>
</html>
Cade_Roux_182550
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