get_dirsize()WP 3.0.0

Gets the size of a directory in bytes. The result is cached to a transient option (or object cache).

The cache is stored in get_transient( 'dirsize_cache' ) as array keyed by folder name.

It is a helper function that is used primarily to check whether multisite blog has exceeded its allowed uploads space.

The function is defined only for Multisite WordPress installation. In order to make it available for the single website installation, you need to include this file:

require_once ABSPATH . WPINC .'/ms-functions.php';

No Hooks.


Int|false|null. Size of the directory in bytes. False if the directory doesn't exist.


get_dirsize( $directory, $max_execution_time );
$directory(string) (required)
Full path of a directory.
Maximum time to run before giving up. In seconds. The timeout is global and is measured from the moment WordPress started to load.
Default: null



#1 Get the full size of uploads directory

$upload_dir = wp_upload_dir();

// include necessary functions
require_once ABSPATH . WPINC .'/ms-functions.php';

$mb = get_dirsize( $upload_dir['basedir'] );

echo number_format( $mb / (1024*1024), 1 ) .' MB'; // output: 93.2 MB


Since 3.0.0 Introduced.
Since 5.2.0 $max_execution_time parameter added.

get_dirsize() code WP 6.5.2

function get_dirsize( $directory, $max_execution_time = null ) {

	 * Exclude individual site directories from the total when checking the main site of a network,
	 * as they are subdirectories and should not be counted.
	if ( is_multisite() && is_main_site() ) {
		$size = recurse_dirsize( $directory, $directory . '/sites', $max_execution_time );
	} else {
		$size = recurse_dirsize( $directory, null, $max_execution_time );

	return $size;