Terraria NPC Happiness Calculator Plus by GammaRaul, with help from MinerofMillions, fork of a project by McjMzn
Information and Images from each mod's respective wiki, or from their communities if the wiki is missing or otherwise limited. The calculator assumes that towns are at least 240 tiles away from each other. Displayed percentages are shop price modifiers, so the lower, the better. Pylons are sold at 90% and below. The site currently has 81 NPCs and 13 Biomes from 8 Mods (Counting Vanilla).