D&D 5e Encounter Calculator - DnD Metrics

Calculate encounter difficulty for Dungeons & Dragons 5th Edition using Challenge Ratings 2.0. Our D&D encounter calculator uses data from over 15,000 real combat encounters to predict battle difficulty with 87% accuracy.

Features of Our D&D Encounter Builder

How to Use the Encounter Calculator

  1. Add your party members with their levels
  2. Select monsters to face the party
  3. View difficulty rating and combat predictions
  4. Adjust encounter balance as needed

Why Use DnD Metrics?

Unlike the basic Challenge Rating system in the Dungeon Master's Guide, our calculator uses Challenge Ratings 2.0 - a data-driven system based on thousands of real D&D combats. This provides more accurate difficulty predictions for modern 5e gameplay.

Better Than Kobold Fight Club

DnD Metrics offers a modern alternative to Kobold Fight Club with improved accuracy, updated monster stats, and AI-powered combat predictions.

D&D 5e Conditions

Quick reference for all status conditions in Dungeons & Dragons 5th Edition. Click on any condition for detailed effects.

👁️‍🗨️

Blinded

A blinded creature can't see and automatically fails any ability check that requires sight.

Effects

  • Attack rolls against the creature have advantage
  • The creature's attack rolls have disadvantage
💕

Charmed

A charmed creature can't attack the charmer or target the charmer with harmful abilities or magical effects.

Effects

  • Can't attack the charmer
  • Charmer has advantage on social ability checks
🔇

Deafened

A deafened creature can't hear and automatically fails any ability check that requires hearing.

Effects

  • Can't hear
  • Auto-fail hearing checks
😨

Frightened

A frightened creature has disadvantage on ability checks and attack rolls while the source of its fear is within line of sight.

Effects

  • Disadvantage on ability checks and attack rolls
  • Can't willingly move closer to the source of fear
🤼

Grappled

A grappled creature's speed becomes 0, and it can't benefit from any bonus to its speed.

Effects

  • Speed becomes 0
  • Ends if grappler is incapacitated
  • Ends if effect removes grappled creature from reach
💫

Incapacitated

An incapacitated creature can't take actions or reactions.

Effects

  • Can't take actions
  • Can't take reactions
👻

Invisible

An invisible creature is impossible to see without the aid of magic or a special sense.

Effects

  • Attack rolls against creature have disadvantage
  • Creature's attack rolls have advantage
  • Can still be detected by noise or tracks
🧊

Paralyzed

A paralyzed creature is incapacitated and can't move or speak.

Effects

  • Incapacitated
  • Can't move or speak
  • Auto-fail Strength and Dexterity saving throws
  • Attack rolls against creature have advantage
  • Hits from within 5 feet are critical hits
🗿

Petrified

A petrified creature is transformed into a solid inanimate substance (usually stone).

Effects

  • Weight increases by factor of 10
  • Incapacitated
  • Can't move or speak
  • Unaware of surroundings
  • Attack rolls against have advantage
  • Auto-fail Strength and Dexterity saves
  • Resistance to all damage
  • Immune to poison and disease
🤢

Poisoned

A poisoned creature has disadvantage on attack rolls and ability checks.

Effects

  • Disadvantage on attack rolls
  • Disadvantage on ability checks
🛌

Prone

A prone creature's only movement option is to crawl, unless it stands up.

Effects

  • Disadvantage on attack rolls
  • Melee attacks against have advantage
  • Ranged attacks against have disadvantage
  • Standing up costs half movement
⛓️

Restrained

A restrained creature's speed becomes 0, and it can't benefit from any bonus to its speed.

Effects

  • Speed becomes 0
  • Attack rolls against have advantage
  • Creature's attacks have disadvantage
  • Disadvantage on Dexterity saving throws

Stunned

A stunned creature is incapacitated, can't move, and can speak only falteringly.

Effects

  • Incapacitated
  • Can't move
  • Can speak only falteringly
  • Auto-fail Strength and Dexterity saves
  • Attack rolls against have advantage
💤

Unconscious

An unconscious creature is incapacitated, unable to move or speak, and unaware of its surroundings.

Effects

  • Incapacitated
  • Can't move or speak
  • Unaware of surroundings
  • Drops whatever it is holding
  • Falls prone
  • Auto-fail Strength and Dexterity saves
  • Attack rolls against have advantage
  • Hits from within 5 feet are critical hits
😵

Exhaustion

Exhaustion is measured in six levels. Effects are cumulative.

Effects

  • Level 1: Disadvantage on ability checks
  • Level 2: Speed halved
  • Level 3: Disadvantage on attacks and saves
  • Level 4: HP maximum halved
  • Level 5: Speed reduced to 0
  • Level 6: Death
🎯

Concentration

Some spells require you to maintain concentration in order to keep their magic active.

Effects

  • Only one concentration spell at a time
  • Taking damage requires CON save (DC 10 or half damage)
  • Being incapacitated or killed ends concentration

Based on the D&D 5e System Reference Document (SRD 5.1).