I&#39;m using this function to convert a file size in bytes to a human-readable file size:

	function getReadableFileSizeString(fileSizeInBytes) {
		var i = -1;
		var byteUnits = [&#39; kB&#39;, &#39; MB&#39;, &#39; GB&#39;, &#39; TB&#39;, &#39;PB&#39;, &#39;EB&#39;, &#39;ZB&#39;, &#39;YB&#39;];
		do {
			fileSizeInBytes = fileSizeInBytes / 1024;
			i++;
		} while (fileSizeInBytes &gt; 1024);

		return Math.max(fileSizeInBytes, 0.1).toFixed(1) + byteUnits[i];
	};

However, it seems like this isn&#39;t 100% accurate. For example:

    getReadableFileSizeString(1551859712); // output is &quot;1.4 GB&quot;

Shouldn&#39;t this be `&quot;1.5 GB&quot;`? It seems like the division by 1024 is losing precision. Am I totally misunderstanding something or is there a better way to do this?

Converting file size in bytes to human-readable string

A function to return human readable size from bytes size:

    &gt;&gt;&gt; human_readable(2048)
    &#39;2 kilobytes&#39;
    &gt;&gt;&gt;

How to do this?

Get human readable version of file size?

For instance, I have a large filesystem that is filling up faster than I expected. So I look for what&#39;s being added:

    find /rapidly_shrinking_drive/ -type f -mtime -1 -ls | less

And I find, well, lots of stuff. Thousands of files of six-seven types. I can single out a type and count them:

    find /rapidly_shrinking_drive/ -name &quot;*offender1*&quot; -mtime -1 -ls | wc -l

but what I&#39;d really like is to be able to get the total size on disk of these files:

    find /rapidly_shrinking_drive/ -name &quot;*offender1*&quot; -mtime -1 | howmuchspace

I&#39;m open to a Perl one-liner for this, if someone&#39;s got one, but I&#39;m not going to use any solution that involves a multi-line script, or File::Find.



total size of group of files selected with &#39;find&#39;

In my site host, I have seen (via phpinfo) that 

 - post_max_size = 8Mb
 - upload_max_filesize = 16Mb

This led me to think that I should be able to upload as file as big as 16Mb.
However, when I do this through a post method (as normal), post_max_size takes over and declares that I sent too much.

What is the method which permits sending a file as big as 16Mb ?
GET - PUT - other ?

Hope someone can clarify this for me.

Simon

PHP post_max_size overrides upload_max_filesize

While googling, I see that using [`java.io.File#length()`][1] can be slow.
[`FileChannel`][2] has a [`size()`][3] method that is available as well.

Is there an efficient way in java to get the file size?


  [1]: http://docs.oracle.com/javase/6/docs/api/java/io/File.html#length%28%29
  [2]: http://docs.oracle.com/javase/6/docs/api/java/nio/channels/FileChannel.html
  [3]: http://docs.oracle.com/javase/6/docs/api/java/nio/channels/FileChannel.html#size%28%29

java get file size efficiently

How can I figure out the size of a file, in bytes?

    #include &lt;stdio.h&gt;
    
    unsigned int fsize(char* file){
      //what goes here?
    }

How do you determine the size of a file in C?

Let&#39;s create a complementary question to [this one][1].
What is the most common way to get the file size in C++?
Before answering, make sure it is portable (may be executed on Unix, Mac and Windows),
reliable, easy to understand and without library dependencies (no boost or qt, but for instance glib is ok since it is portable library).

  [1]: https://stackoverflow.com/questions/238603/how-can-i-get-a-files-size-in-c

How can I get a file&#39;s size in C++?

How can I convert the output of PHP&#39;s `filesize()` function to a nice format with MegaBytes, KiloBytes etc?

like:

- if the size is less than 1 MB, show the size in KB
- if it&#39;s between 1 MB - 1 GB show it in MB
- if it&#39;s larger - in GB


PHP filesize MB/KB conversion

I am using a library that reads a file and returns its size in bytes.

This file size is then displayed to the end user; to make it easier for them to understand it, I am explicitly converting the file size to `MB` by dividing it by `1024.0 * 1024.0`. Of course this works, but I am wondering is there a better way to do this in Python?

By better, I mean perhaps a stdlib function that can manipulate sizes according to the type I want. Like if I specify `MB`, it automatically divides it by `1024.0 * 1024.0`. Somethign on these lines.

Better way to convert file sizes in Python

Are there pitfalls for specific operating systems, I should know of?

There are many duplicates ([1][1], [2][2], [3][3], [4][4], [5][5]) of this question but they were answered decades ago. The very high voted answers in many of these questions are wrong today.   

Methods from other (old QA&#39;s) on .sx
------------------------------
 * [stat.h][6] (wrapper [sprintstatf][7]), uses syscall

 * [tellg()][8], returns per definition a **position** but **not necessarily bytes**. The return type is not `int`. 



  [1]: https://stackoverflow.com/questions/5840148/how-can-i-get-a-files-size-in-c
  [2]: https://stackoverflow.com/questions/22984956/tellg-function-give-wrong-size-of-file
  [3]: https://stackoverflow.com/questions/2641639/fstreams-tellg-seekg-returning-higher-value-than-expected
  [4]: https://stackoverflow.com/questions/54237341/how-can-i-determine-the-current-size-of-the-file-opened-by-stdofstream
  [5]: https://stackoverflow.com/questions/32057750/how-to-get-the-filesize-for-large-files-in-c
  [6]: http://pubs.opengroup.org/onlinepubs/009695399/functions/stat.html
  [7]: https://github.com/hpc/sprintstatf
  [8]: https://en.cppreference.com/w/cpp/io/basic_istream/tellg

How to get the file size in bytes with C++17

Is there any way to find out the file size before uploading the file using AJAX / PHP in change event of input file?

Get file size before uploading

I&#39;m sure I&#39;ve just missed this in the manual, but how do you determine the size of a file (in bytes) using C++&#39;s `istream` class from the `fstream` header?

Using C++ filestreams (fstream), how can you determine the size of a file?

    var length = new System.IO.FileInfo(path).Length;

This gives the logical size of the file, not the size on the disk. 

I wish to get the size of a file on the disk in C# (preferably without *interop*) as would be reported by Windows Explorer.

It should give the correct size, including for:

  - A compressed file
  - A sparse file
  - A fragmented file


Get size of file on disk

I have a zip file on a server.

How can I check if the file size is larger than 27 MB?

    File file = new File(&quot;U:\intranet_root\intranet\R1112B2.zip&quot;);
    if (file &gt; 27) {
       //do something
    }

 

How to get the size of a file in MB (Megabytes)?

Is it possible to show the total file size difference between two commits? Something like:

    $ git file-size-diff 7f3219 bad418 # I wish this worked :)
    -1234 bytes

I’ve tried:

    $ git diff --patch-with-stat

And that shows the file size difference for each _binary_ file in the diff — but not for text files, and not the total file size difference.

Any ideas?

Git: show total file size difference between two commits?

Is there a way to get the size of a remote file like

    http://api.twitter.com/1/statuses/public_timeline.json

in shell script?

How to get remote file size from a shell script?

I need a way to get the size of a file using C#, and not the size on disk. How is this possible?

Currently I have this loop

    foreach (FileInfo file in downloadedMessageInfo.GetFiles())
    {
        //file.Length (will this work)
    }

Will this return the size or the size on disk?


How do you get the file size in C#?

Is there any easy way to create a class that uses **IFormatProvider** that writes out a user-friendly file-size?

    public static string GetFileSizeString(string filePath)
    {
        FileInfo info = new FileInfo(@&quot;c:\windows\notepad.exe&quot;);
        long size = info.Length;
        string sizeString = size.ToString(FileSizeFormatProvider); // This is where the class does its magic...
    }

It should result in strings formatted something like &quot;*2,5 MB*&quot;, &quot;*3,9 GB*&quot;, &quot;*670 bytes*&quot; and so on.

File-size format provider

I want to have a batch file which checks what the `filesize` is of a file.

If it is bigger than `%somany% kbytes,` it should redirect with GOTO to somewhere else.

Example:

    [check for filesize]
    IF %file% [filesize thing Bigger than] GOTO No
    echo Great! Your filesize is smaller than %somany% kbytes.
    pause
    exit
    :no
    echo Um... You have a big filesize.
    pause
    exit


How can I check the size of a file in a Windows batch script?

Is there a way to find the size of a file object that is currently open?

Specifically, I am working with the tarfile module to create tarfiles, but I don&#39;t want my tarfile to exceed a certain size.  As far as I know, tarfile objects are file-like objects, so I imagine a generic solution would work.

Size of an open file object

I&#39;m looking for the smallest (in terms of filesize) transparent 1 pixel image.

Currently I have a gif of 49 bytes which seems to be the most popular.

But I remember many years ago having one which was less than 40 bytes. Could have been 32 bytes.

Can anyone do better? Graphics format is no concern as long as modern web browsers can display it and respect the transparency.

**UPDATE**: OK, I&#39;ve found a 42 byte transparent single pixel gif:
[http://bignosebird.com/docs/h3.shtml][1]


  [1]: http://bignosebird.com/docs/h3.shtml


**UPDATE2**: Looks like anything less than 43 bytes might be unstable in some clients. Can&#39;t be having that.



smallest filesize for transparent single pixel image

What&#39;s a simple way to find the size of my Git repository?

And I don&#39;t mean `du -h` on the root directory of my repository. I have a lot of ignored files, so that size would be different from my total repository size. I essentially want to know how much data would be transferred upon cloning my repository.


Find size of Git repository

In my iPhone app I am using the following code to find a file&#39;s size. Even though the file exists, I am seeing zero for the size. Can anyone help me? Thanks in advance.

    
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *URL = [documentsDirectory stringByAppendingPathComponent:@&quot;XML/Extras/Approval.xml&quot;];
	
    NSLog(@&quot;URL:%@&quot;,URL);
    NSError *attributesError = nil;
    NSDictionary *fileAttributes = [[NSFileManager defaultManager] attributesOfItemAtPath:URL error:&amp;attributesError];
	
    int fileSize = [fileAttributes fileSize];

Finding file&#39;s size

How do I get a human-readable file size in bytes abbreviation using .NET?

**Example**:
Take input 7,326,629 and display 6.98 MB

All Filesize Solutions on Gang of Coders

Total of 24 Filesize Solutions