Open Dungeons RPG™

Encounter Formula Calculator

Party Stats
Enter the total hit points of the party
Enter the number of actions the party takes per round
Monsters in Encounter Stats
Enter the total hit points of the monsters
Enter the number of actions the monsters take per round

Note: Encounter difficulty primarily measures combat duration and party exposure time. Remember that fragile classes (Wizards, Thieves) remain vulnerable to focused attacks and critical hits regardless of encounter rating, monster numbers, or monster hit points - even a weak foe can endanger lives with a single solid attack.

Step 2: Action Check (automatic)
  • Drop 1 step when Monsters has fewer actions than party’s total.
  • Raise 1 step if Monsters has more actions (multiattacks) per round than party’s total.

Current Action Check: Enter Party/Monster actions above.

Step 3: Spice Bump

Adjust difficulty based on tactical advantages or disadvantages: