# F11 overlay: What do the parenthesis numbers of L= latency, T= mean?

**URL:** <https://forums.ageofempires.com/t/f11-overlay-what-do-the-parenthesis-numbers-of-l-latency-t-mean/290195>\
**Category:** II - Ask for Help\
**Created:** [October 2, 2026, 6:09pm UTC](https://forums.ageofempires.com/t/f11-overlay-what-do-the-parenthesis-numbers-of-l-latency-t-mean/290195 "2026-10-02T18:09:48Z")\
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**Author:** ![Aziz](https://forums.ageofempires.com/user_avatar/forums.ageofempires.com/aziz/32/215228_2.png) [@Aziz](https://forums.ageofempires.com/u/Aziz)\
**Post date:** [October 2, 2026, 6:09pm UTC](https://forums.ageofempires.com/t/f11-overlay-what-do-the-parenthesis-numbers-of-l-latency-t-mean/290195/1 "2026-10-02T18:09:48Z")

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Hi all,

I’m trying to understand the numbers shown by the F11 debug overlay. I don’t understand what the numbers in parentheses mean, or what `T=` means.

 ![image](https://forums.ageofempires.com/uploads/default/original/3X/2/7/279f2e714d990de3deb109caeae778eef53c80aa.png)

During a match, it shows something like:  
`x, 14, 8, 1`  
Only `x` fluctuates; the other three values stay the same.

After the match, on the return to map / post-game screen, it shows:  
`7, 7, 15, 1`

In skirmish, `T=` appears to represent the actual realtime clock, and `L=` is always `L=0`, for example:  
`(0, 1, 62, 1)`

Could someone explain:  
What each number in parentheses represents?

- What T= and L= stand for? Is L= latency?
- Why L= is always 0 in skirmish?
- Why the values differ during the match vs. after the match?

Also, I’d like to know how FPS is calculated — is it an averaged sampling rate over a certain period? What is its sample duration and interval? And how is ping calculated, and how often is this overlay refreshed?

Thanks!