What is the maximum HP in Terraria?

The maximum HP in Terraria is 500 because as the player progresses and defeats bosses, they gain access to more powerful equipment and accessories that increase their maximum health. The game provides methods to increase health incrementally, such as using Life Crystals which raise HP by 20 each, and certain boss drops like the Life Fruits that boost HP by 5 each. While the base HP limit starts at 100, it can be further enhanced with equipment like the Lifeforce Potion that temporarily boosts maximum HP by 100, allowing players to reach the ultimate maximum of 500 health. This cap ensures that players have a challenging progression while still providing a satisfying sense of achievement and survivability.