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Kordu Tools
Gaming Runs in browser Updated 30 Mar 2026

Encounter Calculator

Build and balance D&D 5e encounters instantly. Set party size and level, add monsters by CR, and see real-time difficulty ratings with adjusted XP using official DMG rules.

Difficultytrivial
EasyMedHardDeadly
Raw XP
0
Adjusted XP
0
XP per Player
0
Monsters
0
Easy1,000
Medium2,000
Hard3,000
Deadly4,400
Loading rating…

How to use Encounter Calculator

  1. Set your party size and level

    Enter the number of players (1–10) and their character level (1–20). Use same-level mode for a uniform party, or toggle individual levels if players are at different tiers.

  2. Add monsters to the encounter

    Select a challenge rating from CR 0 to CR 30 and set the quantity, then click Add Monster. Repeat for each different creature type to build mixed encounters.

  3. Read the difficulty rating

    The results panel instantly shows total XP, adjusted XP after the encounter multiplier, and a color-coded difficulty label: Easy, Medium, Hard, or Deadly.

  4. Fine-tune to hit your target difficulty

    Adjust monster quantities or remove creature types until the difficulty bar lands where you want it. The per-player XP value shows exactly how much experience to award after the fight.

Encounter Calculator FAQ

How does the D&D 5e encounter multiplier work?
The DMG multiplies total monster XP by a factor based on monster count: 1 monster is ×1, 2 monsters ×1.5, 3–6 monsters ×2, 7–10 monsters ×2.5, 11–14 monsters ×3, and 15+ monsters ×4. More enemies are disproportionately harder due to action economy — more attacks mean more chance to down players quickly.

What is the difference between raw XP and adjusted XP?
Raw XP is the sum of each monster's individual XP value from the Monster Manual. Adjusted XP multiplies that total by the encounter multiplier based on monster count. Adjusted XP determines encounter difficulty; players are awarded the raw XP divided among the party.

How are the Easy, Medium, Hard, and Deadly thresholds calculated?
Each player level has four XP thresholds defined in the DMG. Party thresholds are the sum of all individual player thresholds. If adjusted XP exceeds the Deadly threshold, the encounter is Deadly. Below Easy is considered trivial.

Does this work for mixed-level parties?
Yes. Toggle to individual level mode and enter each player's level separately. The calculator sums per-player thresholds for every level in the party to produce accurate difficulty ratings for uneven groups.

Is this accurate to the D&D 5e DMG rules?
Yes. All XP-by-CR values, per-level thresholds, and encounter multipliers come directly from the D&D 5e Dungeon Master's Guide, Chapter 3. The calculator uses the same math described in the book — it just does it instantly.

How is this different from Kobold Fight Club?
This calculator covers the same core workflow — party setup, monster CR selection, difficulty rating, and XP calculation — with no sign-up required, no ads in the results area, and instant browser-based results. It's a clean, fast alternative for session-prep at the table.

What CR should I use for a boss fight?
For a challenging but winnable boss fight, target a Deadly encounter (1.5–2× the party's Hard XP threshold) using a single high-CR creature. A solo boss at CR equal to party level +2 or +3 is usually a solid starting point — use the calculator to verify before the session.

Does this support Pathfinder or other systems?
The current calculator uses D&D 5e DMG data specifically. The XP threshold and encounter multiplier tables are 5e-only. Pathfinder 2e uses a different encounter-building system based on level-based XP budgets.

Background

Plan perfectly balanced D&D 5e combat encounters in seconds without juggling DMG tables. Enter your party size and player levels, then add monsters by challenge rating to see encounter difficulty update in real time.

The calculator uses official Dungeon Master's Guide XP thresholds and encounter multipliers to rate every combination as Easy, Medium, Hard, or Deadly with a color-coded difficulty bar. Toggle individual-level party mode when players are at different tiers for accurate mixed-party ratings. Add multiple monster groups at different CRs to build complex encounters with mixed creature types.

Results show raw monster XP, adjusted XP after the encounter multiplier, per-player XP for awarding experience, and exactly where the encounter falls relative to each difficulty threshold. All 20 player levels and CRs 0 through 30 are supported. A fast, ad-free alternative to Kobold Fight Club for DMs who need quick encounter math in session.

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