For Doodle World , it looks like the max storage costs 800 Robux to reach the cap of 30 storages, based on a public video discussing the upgrade cost.

If you meant Roblox account Robux balance in general, there isn’t a normal “max out” spending point tied to the currency itself; one source says the balance cap is extremely high, while another explains Robux is sold in fixed packages rather than a single unlimited purchase amount.

Quick Scoop

  • Doodle World max storage: 800 Robux.
  • Robux balance overall: effectively not something most players will ever reach the cap for.
  • Buying Robux: Roblox sells it in preset bundles like 500, 1,000, 2,000, 5,250, 11,000, and 24,000 Robux.

If you meant a different game’s “max out,” send the game name and I’ll pin it down.