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.

Filter by
Sorted by
Tagged with
31 votes
4 answers
53k views

Does natural armor stack with unarmored defense?

In D&D 5E, does natural armor stack with Unarmored Defense? We have a level 2 player character who wild shaped into an animal. The player said they could stack its natural armor with Unarmored ...
user avatar
21 votes
3 answers
25k views

Combining various AC-providing clothing and armor

Are there any rules for combining different clothing/armor for providing AC? For example, can an adventurer wear full plate and bracers and get the AC bonus from both? Can an adventurer wear a Cloak ...
user avatar
  • 687
71 votes
15 answers
436k views

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 ...
user avatar
  • 965
31 votes
4 answers
87k 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 ...
user avatar
  • 46.9k
31 votes
6 answers
11k 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 ...
user avatar
  • 2,141
13 votes
1 answer
5k views

Does an Enhancement bonus on clothing become an Armor bonus?

Given this discussion I had here about combining Magic Vestment and Coat of Many Stars: Targeting what you're wearing would get you two different, non-stacking sources of Armor bonus. – Zachiel ...
user avatar
  • 838
25 votes
2 answers
45k views

In what situations would a target be denied a Dex bonus to AC?

I have an encounter coming up where my PCs will face a high level rogue. Naturally, I'd like to use his sneak attack ability, but I've never played a rogue before so I'm light on experience. From the ...
user avatar
  • 1,807
47 votes
8 answers
11k views

How do I explain to an AD&D player that items that increase Armor Class in D&D 5e are overpowered?

Context: I have recently started a campaign with a new player that comes from an AD&D background. He wishes to convert and import his character to the campaign. We did this once, and I helped him ...
user avatar
  • 995
14 votes
3 answers
34k 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 ...
user avatar
  • 143
12 votes
4 answers
56k views

How does barkskin work?

Now the wording in the spell description is extremely vague and ambiguous making the spell effect up for interpretation. It just says: ... the target's AC can't be less than 16, regardless of what ...
user avatar
  • 4,118
31 votes
8 answers
55k 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 ...
user avatar
43 votes
8 answers
16k views

Mathematically, is a +2 bonus to AC better than attackers having disadvantage?

Mathematically speaking, I'm trying to determine if Bracers of Defense (AC+2) is better than a Cloak of Displacement, which causes all attackers to have disadvantage on attack rolls against you. If ...
user avatar
24 votes
3 answers
10k 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, “...
user avatar
  • 27.8k
14 votes
4 answers
9k views

Does an unconscious creature still use its dexterity to avoid attacks?

Related - How does one dispatch a helpless opponent? Here's the unconscious condition description: Unconscious An unconscious creature is Incapacitated, can't move or speak, and is unaware of ...
user avatar
  • 61.5k
15 votes
1 answer
12k views

Does Mage Armor stack with the Shield spell?

Mage Armor sets the target's base AC to 13+Dex. The Shield spell gives you a +5 bonus to AC. If you cast both on yourself, does that give you an effective AC of 18+Dex while both spells are in effect?
user avatar
  • 14.4k
28 votes
3 answers
10k 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 ...
user avatar
  • 3,785
20 votes
1 answer
1k 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 ...
user avatar
  • 50.5k
9 votes
4 answers
36k views

Average AC of monsters per CR?

In D&D 4e, you could tell most monster's AC just from its level and role (Brute, Skirmisher, Soldier). This is not the case in 5e, but an estimation would be very useful when you try to compare ...
user avatar
  • 51.9k
0 votes
1 answer
783 views

What is the AC of a sprite familiar (from the Find Familiar spell) if it is dismissed to a pocket dimension and then caused to reappear as an action?

The most recent Sage Advice Compendium erratas the find familiar spell so that familiars are now stripped naked when dismissed to a pocket dimension. The Pact of the Chain warlock can summon a Sprite ...
user avatar
26 votes
8 answers
51k 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.)
user avatar
25 votes
10 answers
5k views

Does rolling AC to oppose an Attack Roll impact game balance?

I really like the concept of rolling d20 against each other during ability checks like grappling, etc. I want the same thing for normal attacks, so the defender would also roll a d20 + (AC-10). Would ...
user avatar
  • 373
18 votes
1 answer
3k 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 (...
user avatar
  • 6,469
17 votes
4 answers
19k views

Is there Touch AC and/or Flatfooted AC in 5th Edition D&D?

Does D&D 5E have a mechanic similar to Touch AC or Flatfooted AC as it exists in D&D 3.5? To put it simply, in D&D 3.5, touch AC excludes armor bonuses when armor can't help against an ...
user avatar
  • 1,689
11 votes
4 answers
1k views

What's my most efficient use of spell slots to help my AC?

I've got a wizard with 11 Dex and I'm trying to figure out what my most efficient use of spell slots is to help me from getting hit. We typically have 2-4 very difficult encounters per day and I want ...
user avatar
  • 122k
15 votes
6 answers
3k views

Consequences of having half damage on attacks that tie AC as house rule?

Typically if an attack roll equals the AC of a target then the attack does normal damage. I quite like the idea of making it a glancing blow, dealing half damage instead, this would help clue the PCs ...
user avatar
13 votes
3 answers
19k views

Will adding helmets unbalance the game?

I can't find any mention of a helmet in the Player Handbook in the armour table, and the only helmets I can find are magic items like The Helm of Telepathy. Would it be unbalanced to allow helmets to ...
user avatar
  • 4,183
13 votes
2 answers
3k views

Is it possible to increase the AC of a mirror image duplicate?

Pretty straight forward question. By RAW, is it possible to increase the AC of the duplicates created by mirror image or they will always have an AC equal to 10 + Dex modifier? Be it using other ...
user avatar
  • 5,678
10 votes
3 answers
13k views

Can Monks gain the benefit of the Dual Wielder Feat with their Unarmed Strikes?

Simply put - can the Monk class use the Dual Wielder Feat with: A (monk) weapon and an unarmed strike? An unarmed strike "in each hand"? Admittedly this is a similar question to this post about ...
user avatar
  • 2,613
10 votes
3 answers
2k views

Can you decide not to use a shield's AC bonus? Dex bonus?

Let's say that there is a combat. There's is one player character and two enemies- one melee and one ranged. The player character has Armor of Agathys (or some other spell) and wants the melee ...
user avatar
  • 2,141
8 votes
5 answers
9k views

Staff of Defense total AC and Shield Stacking

My party is about to confront Glasstaff and potentially obtain the Staff of Defense. This slender, hollow staff is made of glass yet is as strong as oak. It weighs 3 pounds. You must be attuned to ...
user avatar
  • 2,799
7 votes
1 answer
2k views

Can a monk “wear” Mage Armor without losing their wisdom bonus to AC?

Can a monk use mage armor without losing their wisdom bonus to AC (in 3.5e)? More generally, can a divine caster wearing a monk's belt use greater luminous armor without losing their wisdom bonus to ...
user avatar
  • 76.5k
6 votes
1 answer
4k views

Do any of these sources of AC bonuses conflict or negate each other?

My understanding, confirmed by the answer to this question: When a War Caster Wizard carrying a shield casts the spell "Shield" does the AC bonus Stack? is that anywhere an actual +N bonus ...
user avatar
4 votes
4 answers
1k views

What can a dragon use to increase their armour class? [closed]

It is hard to survive as dragon - and yet they do. Despite being known for their nasty claws+bite, fear radiance and breath weapon - thus becoming a high priority target for nearly any ranged attack - ...
user avatar
2 votes
3 answers
2k views

AC calculation with a Defense Fighter + Shield + Defensive duelist

I try to create a lvl 4 character with a lot of AC. I'm not sure if it's ''legal'' So here it is: Studded leather armor : 12 AC Dex mod : +3 Shield + 2 AC Fighter Defensive style : +1 Ac Feat ...
user avatar
2 votes
1 answer
816 views

Is Magic Armor with an Enhancement Bonus over 4 Automatically Masterwork Armor?

Motivation After seeing this comment, I read this answer and this answer. This gave me the distinct impression that any magic armor with an enhancement bonus of +4 or more is automatically ...
user avatar
  • 5,595
0 votes
1 answer
2k views

What defines an armor?

There are some spells and perks that require not having armor on to work, so how is armor defined? Is it just any equippable gear that has additional AC? Is it anything more durable than regular ...
user avatar
  • 3,389
0 votes
1 answer
3k views

Would the shield spell stack with shield enhancement when it replaces the shield bonus?

When you use a shield and it has an enhancement value, both of these are added to your AC. Normally when you use the shield spell, it tends to have a better bonus than the shield you are using so it ...
user avatar
  • 26.2k
25 votes
3 answers
354k views

What exactly is "base AC"?

The phrase "base AC" appears in the D&D 5E basic rules exactly once, in the description of the Mage Armor spell. This says: The target’s base AC becomes 13 + its Dexterity modifier. But if ...
user avatar
  • 28.6k
20 votes
5 answers
8k 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 ...
user avatar
  • 18.6k
15 votes
4 answers
16k 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 ...
user avatar
  • 18.6k
13 votes
3 answers
67k views

How does the AC evolve with high levels?

I am currently DMing a group with an average level of 10. This is my first experience as DM so I have never mastered high levels. Current ACs are reasonably high at the moment (22 for the Paladin with ...
user avatar
  • 8,470
21 votes
6 answers
41k views

How do you calculate THAC0?

We're playing AD&D 1st edition and we have been asked by the DM to calculate our THAC0s so as to speed things up. So, I get what THAC0 stands for (To Hit Armour Class 0) but it's not something I ...
user avatar
  • 1,484
13 votes
2 answers
3k views

How does __(Dexterity) vs. AC work?

I'm working through the new Red Box, and have ended up with a character with the at-will Bump And Run power. The attack is listed as __ (Dexterity) vs. AC Is ...
user avatar
  • 345
13 votes
3 answers
5k views

Can a character dodge an attack that beats their Armor Class?

I am DMing a campaign. The party was fighting two castle guards, and killed one of them. The other guard attacked them, got past the AC of one of my players. He said he could dodge, but I don't know ...
user avatar
10 votes
2 answers
2k views

What is the highest possible unarmored AC?

What is the highest possible AC a character can get by themselves with no armor and no shield? Constraints: Must be obtainable with a single character, by themselves, with no help from any other ...
user avatar
4 votes
1 answer
4k views

What is the maximum AC possible without using magic items?

What is the maximum AC a PC can acquire without the use of magic items? Allowed content are feats, spells, and temporary effects - but not effects from allies, magical items, or UA content.
user avatar
  • 2,141
18 votes
2 answers
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?
user avatar
  • 51.9k
16 votes
2 answers
66k 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 ...
user avatar
  • 1,689
13 votes
2 answers
4k 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 ...
user avatar
  • 1,119
10 votes
6 answers
13k views

Is your character's ability to avoid attacks based solely on AC?

I'm new to D&D. I was wondering about a character's ability to dodge attacks that target them. Is AC the only way for a character to avoid being hit, or is there something else that I've missed?...
user avatar
  • 468