Is there a numerical overview over your XP progression?
Solution 1:
In Borderlands 2, it is possible to view your experience in 2 places. The first is the large EXP bar that is at the very bottom of the HUD:
The other place to view your experience, and also the only place that will display the exact numerical amount, is on the left-most menu page, shown here:
The experience is represented as:
Total Experience Earned / Total Experience to Next Level
Solution 2:
Its under the My Missions tab, at the bottom. See this screenshot: