Questions tagged [armor-class]

For questions about Armor Class (AC), the mechanical abstraction of how difficult it is to hit and cause damage to an opponent in D&D and related RPGs.

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8
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2answers
617 views

Can a warforged druid use composite plating?

A druid gains medium armor proficiency, but is not allowed to use metal armor. A warforged with medium armor proficiency can normally set their Integrated Protection to Composite Plating, granting an ...
3
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1answer
153 views

Lycanthrope AC & Magical Armor

Just a quick question here. One of my players was bit by a Lycanthrope and is currently cursed. Thing is that he plans on staying that since alignment won't alter anything for him. According to the ...
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11answers
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What is the highest possible AC?

Assuming you are level 20, and have access to any magic item, how high can you get AC (permanently or for a set duration)? Constraints: Magic items are those on the tables in the D&D 5th ...
-4
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4answers
339 views

Is there anything that prevents this “Negative AC armor” creation process to function?

This is a follow-up to a portion of this answer to a previous question of mine pertaining to the lowest possible achievable AC. The question is also slightly different as it pertains to magical armor ...
-8
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2answers
29k views

What is Armor Class used for?

I have never understood or found any answer to how to use your AC. Is it something the GM have to keep in mind all the time to reduce or add damage to specific players based on how high their AC is, ...
20
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3answers
1k views

What is the lowest possible AC?

This is a direct, somewhat silly, opposite question to What is the highest possible AC? . I’m wondering what is the lowest possible Armor Class a Player Character can get at any point in time, “...
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1answer
71 views

Does an enemy lose its Dex bonus to AC if it has a miss chance against me?

If I am invisible, the enemy loses its Dex bonus against me, and has a 50% miss chance. If I use Displacement, it also has 50% miss chance against me. Does it also lose its Dex bonus against my ...
5
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2answers
14k views

Can my warlock benefit both from the Mage Armor spell and leather armor?

Currently making a 5E Warlock for an upcoming session, and I'm wondering how this particular interaction works: I, as a Warlock, start with leather armor. I'm considering having Armor of Shadows as ...
12
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1answer
423 views

Does Medium Armor's Max dex also put a cap on the negative side?

I know heavy armor ignores Dexterity modifiers for AC calculations, but what about medium armor for a character with a -3 to their dexterity? Does Medium armor bottom out at -2, or will -3 still apply?...
12
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2answers
41k views

Does Size Affect AC?

I have been playing 3.5 for 6 years now and am trying out 5e. Does size affect AC in 5e? In 3.5 a tiny creature would get a bonus to their AC for being smaller, while a huge creature would get a ...
11
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2answers
3k views

Do Dragonborns get unarmored defense?

Now, I might just be stupid or not have seen it but, I’ve been looking and saw that draconic bloodline sorcerers get unarmored defense for “draconic bloodline”. But, do Dragonborns get this for being ...
4
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1answer
286 views

How does the AC of ships in Ghosts of Saltmarsh interact with the optional vehicle proficiency rules from Xanathar's?

In Xanathar's Guide to Everything, there is an ability under "Land and Water Vehicles" (p. 82) called Vehicle Handling which allows you to add your proficiency bonus to the AC of a land/water vehicle ...
17
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1answer
644 views

Which Armor Class values should be used as controls when making damage calculations?

It is known that occasionally questions will pop up that are about attempts to optimize a character's damage output (sometimes shorthanded as DPR, or Damage-per-Round), and veterans of this game know ...
29
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8answers
31k views

How does a DM deal with a PC with an abnormally high Armor Class?

One of the Fighters in my party has an AC of 21 at level 5. He wears chainmail which gives an AC of 16, has the Defense Fighting Style which gives a +1 to AC when wearing armor, and a +2 shield (found ...
3
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1answer
176 views

The Beast Master ranger adds their proficiency bonus to their animal companion's AC; is the result its new base AC?

As per the Ranger Companion feature, you can add your proficiency bonus to your companion's AC. I would like to know how to interpret this in terms of AC calculation. Could I interpret as though my ...
12
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2answers
445 views

Does the Defensive Duelist feat stack with the AC calculation from the Warforged's Integrated Protection trait?

The warforged integrated protection uses your proficiency bonus as part of the calculation for your AC at all 3 levels if you are proficient in that armor type. The Defensive Duelist feat allows you ...
4
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2answers
116 views

Does the Invisible Blade's Unfettered Defense feature work if you're under the effect of the Mage Armor spell?

The Invisible Blade's Unfettered Defense feature (CW 46) says: An invisible blade benefits from an increased survival instinct during combat. Because of this sixth sense, he adds 1 point of ...
6
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1answer
432 views

Do AC-increasing items impair a monk's Unarmored Defense as if they were armor?

It's my first campaign, and I'm playing as a monk. My party recently discovered a ring of protection that increases AC by 1, and my party members want to give it to me. I didn't know whether wearing ...
23
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2answers
3k views

Can you benefit from the Defense fighting style while not using armor AC calculation?

Let's assume a Lizardfolk fighter, with the Defense fighting style, wearing leather armor. Lizardfolk, per Volo's p. 113, get Natural Armor: You have tough, scaly skin. When you aren't wearing ...
12
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2answers
3k views

Does the Wisdom modifier apply on a lizard-monk's armor class? [duplicate]

Lizardfolk is a PC race from the book Volo's Guide to Monsters. The Players Handbook says (Monk): Beginning at 1st level, while you are wearing no armor and not wielding a shield, your AC equals ...
6
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3answers
7k views

Does the Lizardfolk NPC template's bonus to AC apply when armored, or only when unarmored?

DMG p. 282 gives guidance for modifying NPC stat blocks to adapt them for specific monster races. For lizardfolk, one of the listed modifications is a "+3 natural armor bonus to AC". A friend and I ...
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4answers
3k views

What is the highest possible temporary AC at level 1, without any help from others?

Assuming you are level 1 and have access to any item that you can afford at character creation rolling the maximum amount of starting gold, and all spells that are available to you due to character ...
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4answers
2k views

What is the highest possible permanent AC at character creation?

Assuming you are level 1 and have access to any item that you can afford at character creation rolling the maximum amount of starting gold, how high can your permanent AC become (permanently, not for ...
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1answer
329 views

How is the Cost of armour affected by the armour's attributes such as AC and type?

The 'Armor and Shields' section of the Player's Handbook lists the AC and Cost of armour and shields. The top end of each armour type (Light, Medium, Heavy) is substantially more expensive than the ...
23
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2answers
3k views

If you attack a Tarrasque while swallowed, what AC do you need to beat to hit it?

If you get swallowed by a Tarrasque, your only way of getting out is to deal it enough damage to force it to regurgitate you (60 damage or more on a single turn). There's no mention of the AC when ...
6
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1answer
224 views

Is there any way I can increase my griffon's AC?

I’m a level 3 Sorcerer and I have a griffon figurine that allows me to summon a griffon. My DM allows me to use it once a day (lasting 6 hours) and it has a base AC of 12. I can increase it to 13+Dex ...
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3answers
20k views

Can a Beast Master ranger armor their animal companion with barding?

I was reading about the Barding rule on page 155 of the PHB, and I was just curious if a Beastmaster Ranger could armor up their companion? If so, how would that stack with the Ranger's proficiency ...
4
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2answers
553 views

Mage Armor with Defense fighting style (for Adventurers League bladeslinger)

The Defense fighting style says: While you are wearing armor, you gain a +1 bonus to AC. Can use still use this if your mage armor AC is overriding your armor's AC because you are still wearing ...
8
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3answers
892 views

Does a lycanthrope's AC change when shapechanged from a form wearing armor?

Weretigers (and all lyncathropes; Monster Manual p. 210) have the Shapechanger trait: The weretiger can use its action to polymorph into a tiger-humanoid hybrid or into a tiger, or back into its ...
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5answers
3k views

How does the Shield spell interact with the Barkskin spell?

I am wondering what the ruling would be on a creature under the effects of the Barkskin spell that then casts the Shield spell as a reaction. Barkskin states: Until the spell ends, the target’s ...
16
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2answers
2k views

How much attack damage does the AC boost from a shield prevent on average?

Statistically, how much attack damage does the AC boost from a shield prevent on average? I've seen claims it results in a 10% reduction in damage taken, is that accurate?
5
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1answer
67 views

Is the Wall of Blades maneuver affected by AC penalties?

Do AC penalties (and bonuses, for that matter) apply to the Wall of Blades manuever? Bob the martial adept has prepared Wall of Blades this morning. He also acquired Shocktrooper last week. Bob's ...
17
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5answers
2k views

Is there a feat that allows you to subtract a number from your AC and add it to your attack roll?

Is there a feat that's the opposite of the Combat Expertise feat? I'm looking for a feat which would allow you to subtract a number from your AC and add it to your attack roll.
3
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1answer
273 views

What type of bonus is a Monk's bonus to AC?

What type of bonus is a Monk's AC bonus in Pathfinder, Natural, Deflect, Or some other type? All I know is that it's a Wisdom bonus.
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5answers
28k views

Is there any difference between Studded Leather and Breastplate if my AC is the same with both?

Playing 5e with a Rogue. To make a long story short: In my possession I have both Studded Leather armor and a Breastplate. With my 18 Dexterity, My AC with Studded Leather is 16 (12+4). But if I don ...
26
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4answers
46k views

How does Mage Armor interact with Unarmored Defense?

If a character with the Unarmoured Defence class feature casts Mage Armour, what is their AC? Do they choose which 'base' AC they take, or do they stack somehow? Is there rules text that explains ...
2
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0answers
679 views

How does Dragon Hide interact with monk AC? [duplicate]

Before I begin let me preface this with the following: I understand that mechanically speaking the barbarian and Monk armor classes are calculated 10 + Dex mod + Wis/Con depending on the class played. ...
4
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2answers
1k views

What options exist to improve a low level Sorcerer's armor class?

I'm creating a character for a new D&D 5e campaign soon. We'll be starting at level 3 to reduce PC mortality, and I don't expect the campaign to run long enough for more than a couple level ...
5
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1answer
207 views

Can you wear Bracers of Armor or an Amulet of Natural Armor with Dragonscale Husk?

Dragonscale Husk, from Dragon Magic, is a cool alternate class feature (ACF) for characters with dragon blood and proficiency in heavy armor. It's useful for a lot of reasons: decent defenses that ...
4
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1answer
487 views

In Wild Shape for druid5/barbarian1, how does unarmored defense work? [duplicate]

Background: My Hill-dwarf character started out as a barbarian. When his clan battled the undead hordes, he barely escaped with his life. He was taken in by a druid, and discovered a higher calling. ...
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6answers
7k views

Can someone decide to be hit?

In this question, I asked about whether a character could willingly not use their shield or Dex bonus on certain attacks due to wanting to be hit. This raises the greater question- Can someone decide ...
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4answers
44k views

Average/optimal AC for core classes per level

I've seen time and again that someone mentions someone has a low or a high AC for his class. So I'm wondering: Is there something like a list for what AC the core classes should have per level (...
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1answer
109 views

What other actions is Total Defense referring to when it says it can't be combined with other actions that increase your AC?

Total Defense states: You can defend yourself as a standard action. Starting at the beginning of this action, you get a +4 bonus to your Armor Class until the start of your next turn. You can’t ...
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4answers
2k views

What methods exist to get your AC higher than 20 without magic items?

I was poking around answering for this question about the highest AC possible for a sorcerer and noticed something odd. It doesn't seem to be possible except in the case of the Barbarian to naturally ...
25
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8answers
32k views

What is the highest AC possible for a sorcerer?

What is the highest Armor Class achievable for a Sorcerer with the Sorcerous Origin of Draconic Bloodline? Player's Handbook Chapter 6 variant rules included. (Multiclassing, Feats, etc.)
3
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1answer
5k views

Does an attack hit if it exactly matches the target's AC?

For an attack to successfully hit a given Armor Class, would it need to get a number higher than the Armor Class or does it hit with the exact number as well?
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5answers
17k views

Does Mage Armor have any advantages over magic Studded Leather +X?

Does Mage Armor have any advantages over Studded Leather +1 or even Studded Leather +2?
11
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2answers
1k views

What is the AC of Land Vehicles?

In regards to the AC and HP of vehicles, the DMG includes a table on Water and Air vehicles on page 119. However, no analogous table exists for Land Vehicles. I am aware of the rules on Objects in ...
27
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3answers
3k views

What rules or guidelines are there about when to allow a party to acquire plate mail?

I have heard it said that 5e does not balance its encounters with respect to magic items; in other words it does not consider possession of magic items when defining appropriately challenging ...
14
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1answer
994 views

As a Swords bard, how do I determine my AC bonus from Defensive Flourish on a critical hit?

Let's say I'm playing a College of Swords bard, and happen to critically strike an enemy with a natural 20. I choose to use my Defensive Flourish at this time, so the dice look like this: 2d6 (...