There is no formula. It's 161 numbers typed by hand.

From 40 XP at level 1 to 390,958,368 at level 150. On a log scale the curve looks almost straight — and that is the trap. What matters is not the climb, it's how much it slows down and then speeds back up.

This is the chart that tells the story. The relative cost drops fast, bottoms out at 1.047× at level 132 — and then climbs again, reaching 1.15× by 150.

That U is a deliberate endgame wall. It is also why no simple equation works: the local exponent of the curve runs from n^2.3 at level 5 to n^23.5 at 158. No single power covers both.

Reaching level 150 costs 4,815,446,173 XP in total. The first 75 levels add up to 91,392,439 — less than a single level in the 140s.

All 150 playable levels, straight from the client.

• The server sends the XP inside your current level, which resets every time you level. It never sends the size of the level.
• The client is what draws the percentage bar. To divide, it needs the denominator — so the table has to be in there.
• It is: an array of 161 32-bit integers in sharedassets0.assets. Searching for the values gave 177,000 false positives; what identified it was the structure — in an array indexed by level, level 22 sits one element after 21, and 33 sits eight after 25. Requiring the hits at the right distances left exactly one candidate.
• It matches 18 independent measurements, taken by reading the game's own progress bar and cross-referencing it with the XP in the packets — a route that never touched the client files.
• One table serves class and job: measured at the same level, the two agree to 0.08%.