# length tag in the filename
**URL:** https://community.mp3tag.de/t/length-tag-in-the-filename/6657
**Category:** Support
**Created:** [April 18, 2008, 5:02pm UTC](https://community.mp3tag.de/t/length-tag-in-the-filename/6657 "2008-04-18T17:02:02Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@pavlos](https://community.mp3tag.de/u/pavlos)
#### Post date: [April 18, 2008, 5:02pm UTC](https://community.mp3tag.de/t/length-tag-in-the-filename/6657/1 "2008-04-18T17:02:02Z")
Hi,
Can someone please tell me what's the format string to use in the Tag-Filename window in order to get printed the length of the wma file after the filename. For instance:
the file A.wma which has a length of 20 seconds would became A 000020.wma
the file B.wma which has a length of 41:28 would became A 004128.wma
we always need to have 6 digits for the time field.
Regards,
pavlos
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### Author:  [@DetlevD](https://community.mp3tag.de/u/DetlevD)
#### Post date: [April 18, 2008, 5:40pm UTC](https://community.mp3tag.de/t/length-tag-in-the-filename/6657/2 "2008-04-18T17:40:28Z")
> [@pavlos](#):
>
> ... what's the format string to use in the Tag-Filename window in order to get printed the length of the wma file after the filename. For instance:
> the file A.wma which has a length of 20 seconds would became A 000020.wma
> the file B.wma which has a length of 41:28 would became A 004128.wma
> we always need to have 6 digits for the time field. ...
This should work:
$right(00$replace(%_length%,_,),6)
DD.20080418.2140.CEST
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### Author:  [@pavlos](https://community.mp3tag.de/u/pavlos)
#### Post date: [April 18, 2008, 6:22pm UTC](https://community.mp3tag.de/t/length-tag-in-the-filename/6657/3 "2008-04-18T18:22:55Z")
It works! Thank you very much DetlevD!!
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:20pm UTC](https://community.mp3tag.de/t/length-tag-in-the-filename/6657/4 "2026-02-09T12:20:54Z")