D&D Encounter XP Calculator
Add up monster XP, apply the encounter multiplier for the group size, and compare it to your party's difficulty thresholds.
How it works
Building a fair fight in D&D 5e starts with the monsters' XP values, but you can't just add them up. A pack of enemies is more dangerous than the same XP in one big creature because more attacks land each round, so the rules multiply the total based on how many monsters there are.
That multiplier climbs in steps: one monster stays at ×1, two jump to ×1.5, groups of three to six are ×2, and it keeps rising up to ×4 for a swarm of fifteen or more. This tool applies the right factor automatically once you enter the monster count.
Then it compares the adjusted XP to your party's thresholds for easy, medium, hard, and deadly, scaled by each character's level and how many players you have. The result tells you roughly how tough the encounter should feel before anyone rolls a die.
Frequently asked questions
Why multiply the monster XP?
Numbers matter in combat. Several weaker monsters get more attacks and actions than a single strong one of equal XP, so the multiplier accounts for that action economy. Two monsters get ×1.5, three to six get ×2, and so on up to ×4.
How are the party thresholds set?
Each character contributes an XP budget for easy, medium, hard, and deadly based on their level, straight from the DMG tables. The tool adds up those budgets for your whole party to get the totals shown.
Is the difficulty rating exact?
Treat it as a guide, not a guarantee. Terrain, magic items, clever tactics, and the specific monsters all shift the real difficulty. The XP math gives you a solid starting point to tune from.