Caculating Mob Levels

Hi, wondering if anyone knows a web resource that will give you the level of a mob based on the exp you get for killing it ?
I noticed that a lot of the newer mobs listed on the FFXI Wiki don't have levels so I was wondering if there is some way of working this out.
Thanks in advance for any help guys and gals.

If you use windower the add-on battlemod will tell you the exact level of an enemy when you check it.

It says something to the tune of:
The enemy appears to be level 110 and is Decent Challenge.

There is a lot of math on this page, it should/could be of use to you
http://wiki.ffxiclopedia.org/wiki/Experience_Points

Thanks for that Valli i'll look into it.

The maths on that page was a little over my head, but the battlemod was exactly what I was looking for thanks Valli.

Dude you and me both. FFXI math is unlike any other math in the universe. It's just weird.