Spell Attack Bonus Formula:
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The Spell Attack Bonus is a key mechanic in Dungeons & Dragons 5th Edition that determines how effectively a spellcaster can hit targets with their spells. It combines your character's training (proficiency bonus) and natural magical talent (spellcasting ability modifier).
The calculator uses the standard D&D 5e formula:
Where:
Explanation: This bonus is added to your d20 roll when making a spell attack against a target's AC.
Details: Your spell attack bonus determines how likely your attack roll spells (like Firebolt or Guiding Bolt) are to hit their targets. A higher bonus means you're more likely to successfully hit with your spells.
Tips:
Q1: How do I find my proficiency bonus?
A: It's based on character level: +2 (levels 1-4), +3 (5-8), +4 (9-12), +5 (13-16), +6 (17-20).
Q2: Which ability modifier do I use?
A: Depends on your class: Wizard (Int), Sorcerer/Warlock/Bard/Paladin (Cha), Cleric/Druid/Ranger (Wis).
Q3: Does this apply to all spells?
A: No, only spells that require an attack roll (not saving throw spells).
Q4: What's a good spell attack bonus?
A: At level 1, +4 to +5 is typical. By level 20, +10 to +11 is common for optimized characters.
Q5: Do magic items affect this?
A: Yes, items like +X wands or the Rod of the Pact Keeper add to your spell attack bonus.