Encounter Balancer
Rate a d20-system combat encounter by comparing the adjusted monster XP against your party’s easy, medium, hard and deadly thresholds. Calculates in your browser.
Difficulty
-
Show the math
Total monster XP is multiplied by a factor based on how many monsters there are (more enemies act more often, so the encounter is harder), then compared to the party's XP thresholds.
adjusted XP = (Σ monster XP) × count multiplier
A planning aid, not a guarantee, terrain, tactics and party composition matter. All math runs locally in your browser.
What this does
An encounter balancer rates a d20-system combat encounter by comparing adjusted monster XP against your party’s easy, medium, hard, and deadly thresholds.
How to use it
- Enter party size and levels.
- Add the monsters and their XP.
- Read the adjusted XP.
- See the difficulty rating.
How it works
More monsters act more often, so total XP is scaled up before comparing to your budget. It is a planning aid, not a guarantee.
adjusted XP = total monster XP × count multiplier
Understanding your result
The adjusted XP scales total monster XP up by a multiplier for numbers, because more creatures act more often and concentrate damage, which is why a swarm of weak foes is deadlier than its raw XP suggests. Treat the easy-to-deadly rating as a planning aid, not a guarantee: terrain, party tactics, and luck swing real fights well beyond the budget.
Example
Four monsters multiply their combined XP by 2 before rating.
Sources & methodology
Last updated .
Frequently asked questions
Why is the XP adjusted upward?
More monsters act more often, so total monster XP is multiplied by a factor based on the number of enemies before comparing to your budget.
Is the rating a guarantee?
No, it is a planning aid. Terrain, tactics and party makeup can shift an encounter’s real difficulty.
Is my data kept?
No. Everything is computed locally in your browser.
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