CR Calc - 5etools

Challenge Rating: 0

Offensive CR: 0

Defensive CR: 0

Proficiency Bonus: +2

Effective HP: 1 (1d8+0)

Effective AC: 13

Average Damage Per Round: 1

Effective Attack Bonus: +3

Experience Points: 0 or 10

Instructions

Enter expected CR of creature.
Fill in the HP, AC, and other defensive attributes of creature.
Fill in offensives attributes of creature. DPR is averaged over three rounds!
Click which special Monster Features it has.
Done!

Be sure to read the Dungeon Master's Guide section on monster creation, pages 273 through 283. You can click on the table to the right to fill in values for a given and adjust to taste. You can hover over the individual labels for a short description of how each attribute contributes to a monster's CR. You can also hover over each feature description to see how that feature affects the calculations.

Expected CR: CR calculation begins by determining what you want the final CR of the monster to be.

Monster Statistics by Challenge Rating

CR	XP	Prof. Bonus	Armor Class	Hit Points	Attack Bonus	Damage/ Round	Save DC
0	0 or 10	2	13	1-6	3	0-1	13
1/8	25	2	13	7-35	3	2-3	13
1/4	50	2	13	36-49	3	4-5	13
1/2	100	2	13	50-70	3	6-8	13
1	200	2	13	71-85	3	9-14	13
2	450	2	13	86-100	3	15-20	13
3	700	2	13	101-115	4	21-26	13
4	1,100	2	14	116-130	5	27-32	14
5	1,800	3	15	131-145	6	33-38	15
6	2,300	3	15	146-160	6	39-44	15
7	2,900	3	15	161-175	6	45-50	15
8	3,900	3	16	176-190	7	51-56	16
9	5,000	4	16	191-205	7	57-62	16
10	5,900	4	17	206-220	7	63-68	16
11	7,200	4	17	221-235	8	69-74	17
12	8,400	4	17	236-250	8	75-80	18
13	10,000	5	18	251-265	8	81-86	18
14	11,500	5	18	266-280	8	87-92	18
15	13,000	5	18	281-295	8	93-98	18
16	15,000	5	18	296-310	9	99-104	18
17	18,000	5	19	311-325	10	105-110	19
18	20,000	6	19	326-340	10	111-116	19
19	22,000	6	19	341-355	10	117-122	19
20	25,000	6	19	356-400	10	123-140	19
21	30,000	7	19	401-445	11	141-158	20
22	41,000	7	19	446-490	11	159-176	20
23	50,000	7	19	491-535	11	177-194	20
24	62,000	7	19	536-580	11	195-212	21
25	75,000	8	19	581-625	12	213-230	21
26	90,000	8	19	626-670	12	231-248	21
27	105,000	8	19	671-715	13	249-266	22
28	102,000	8	19	716-760	13	267-284	22
29	135,000	9	19	760-805	13	285-302	22
30	155,000	9	19	805-850	14	303-320	23

Defensive

Hit Points: A creature's hit points determine its defensive CR before it is adjusted by its AC.
Armor Class: A creature's AC adjusts its defensive CR.

Offensive

Damage Per Round: A creature's damage per round (DPR) determines its offensive CR, which is offset by its attack bonus or save DC. DPR is determined by averaging its maximum damage output (taking the average of dice rolls, ignoring crits and accuracy) over three rounds. Areas of effect are treated as though they hit two creatures, which fail any involved saving throws.
Attack Bonus/Save DC: A creature's attack bonus or save DC adjuts its offensive CR.
Use Saves? If a creature's damage output is more dependent on save-based abilities, its save DC is used for adjusting its offensive CR instead of its attack bonus.

Size: A creature's size determines the size of its individual hit dice.
Hit Dice: Unlike player characters, the number of hit dice an NPC gets is completely arbitrary. Adjust this amount to taste. d8
Constitution: A creature's HP is increases by its Constitution modifier for each hit die it has.

Vulnerabilities: If a creature is vulnerable to common damage types (especially bludgeoning, piercing, and slashing damage), its effective hit points are halved.
Resistances/Immunities: A monster's HP is multiplied based on the resistances and immunities has to common damage types (non-magical budgeoning, piercing, and slashing chief among them).
Flying at CRs 0-9: A monster's effective AC is increased by 2 if it can fly and deal damage at range, though only if its expected challenge rating is 10 or lower.
Save Proficiencies: Increase a creature's effective AC by 2 if it has 3 or 4 saving throw proficiencies, or by 4 if it has 5 or 6.

Monster Features

Name	Example Monster	Feature Description
Aggressive	Orc	As a bonus action, the creature can move up to its speed toward a hostile creature it can see.
Ambusher	Doppelganger	The creature has advantage on attack rolls against any creature it has surprised.
Angelic Weapons	Deva	The creature's weapon attacks are magical. When the creature hits with any weapon, the weapon deals extra radiant damage. Input this extra damage per round.
Avoidance	Demilich	If the creature is subjected to an effect that allows it to make a saving throw to only take half damage, it instead takes no damage if it succeeds on the saving throw, and only half damage if it fails.
Blood Frenzy	Sahuagin	The creature has advantage on melee attack rolls against any creature that doesn't have all its hit points.
Constrict	Giant Constrictor Snake	The creature has the ability to restrain and/or grapple a target as part of an attack.
Damage Transfer	Cloaker	While attached or grappling a creature, the creature takes only half damage dealt to it (rounded down), and the other creature takes the other half.
Enlarge	Duergar	The creature magically increases in size, along with anything it is wearing or carrying. Input the extra damage inflicted per round whilst enlarged.
Frightful Presence	Ancient Gold Dragon	Each creature of the creature's choice within range must make a Wisdom saving throw or be frightened for 1 minute.
Heated Body	Azer	Touching or hitting the creature while within 5 ft. of it causes damage.
Horrifying Visage	Banshee	Each non-undead creature of the creature's choice within range must make a Wisdom saving throw or be frightened for 1 minute.
Legendary Resistance	Tarrasque	If the creature fails a saving throw, it can choose to succeed instead. Input the number of uses per day.
Magic Resistance	Balor	The creature has advantage on saving throws against spells and other magical effects.
Martial Advantage	Hobgoblin	The creature can deal extra damage to a creature it hits if that creature is with in 5 ft. of an ally of the creature that isn't incapacitated. Input the extra damage inflicted per round.
Nimble Escape	Goblin	The creature can take the Disengage or Hide action as a bonus action on each of its turns.
Pack Tactics	Kobold	The creature has advantage on an attack roll against a creature if at least one of the creature's allies is within 5 feet of the creature and the ally isn't incapacitated.
Parry	Hobgoblin warlord	The creature adds its proficiency bonus to its AC against one melee attack that would hit it as a reaction.
Possession	Ghost	The creature can control another creature, during which time it cannot be targeted by nearly any effect.
Regeneration	Troll	At the beginning of the creature's turn, it regains hit points and cannot be killed until this effect is mitigated in some way, usually through acid or fire damage. Input how many hit points it regains at the beginning of its turn.
Relentless	Boar	If the creature would be reduced to 0 hit points, there is a chance that it can instead only be reduced to 1.
Shadow Stealth	Shadow Demon	While in dim light or darkness, the creature can take the Hide action as a bonus action.
Stench	Troglodyte	Any creature other than the monster within 5 feet of it must make a saving throw or be poisoned.
Superior Invisibility	Imp	The creature can turn invisible as an action or bonus action.
Undead Fortitude	Zombie	If the creature would be reduced to 0 hit points, there is a chance that it can instead only be reduced to 1. This feature is negated if the damage is from radient nature.
Web	Giant Spider	Ranged Weapon Attack that restrains the target on a hit.

Note: Not all monster features are covered here. The DMG has specific instructions on how to manage other features.