Enter either your total XP (as displayed in-game when receiving XP)
or your Level 50 XP (as displayed on your profile after reaching level 50)
to calculate your Extended Collector Level.

This is calculated in the same way levels 18-50 are calculated in-game,
and is just for fun to see how high your level would be if it continued infinitely.

Note: the page may freeze or hang if you put ridiculously large values in (9+ digit values). So maybe don't do that. 😛