Armor 5e: Rules, Types, AC, and How to Use It Effectively

In Dungeons & Dragons 5th Edition, armor is the baseline layer of survivability that every character and monster uses to reduce incoming damage. This guide explains how armor works in 5e, covering armor types, how Armor Class is calculated, special rules and conditions that affect armor, how shields and other defenses interact, and practical advice for choosing and using armor effectively. Whether you are a new player building your first character or a seasoned player optimizing defense, this overview provides clear, authoritative rules-based explanations you can rely on.

What Is Armor in 5e and How AC Is Determined

Armor in 5e refers to any worn or carried item that grants a character a bonus to Armor Class. A character’s Armor Class represents how difficult it is to land a successful melee or ranged attack against them. The three primary ways to improve AC are: wearing armor, using a shield, and gaining natural or class features that increase AC. When multiple sources would modify AC, you generally choose the higher value. Below is a table that captures the core verified attributes for common armor pieces in 5e.

Armor Types and Their Mechanical Differences

Armors are grouped by type—light, medium, and heavy—which determines which proficiency a character needs and how the armor interacts with speed and stealth. Light armor is ideal for characters who rely on Dexterity, such as rogues and monks, because it usually allows them to add their Dexterity modifier to AC and typically does not impede movement. Medium armor offers a balance between protection and mobility, but wearing it without proficiency can impose penalties. Heavy armor provides the highest base armor values but can reduce speed to 25 feet and usually requires Strength checks to don and doff unless the armor has the Sturdy property. Weighing these trade-offs is essential when building a character or planning how to present armor visually and narratively.

Light Armor

• Padded: 11 + Dexterity modifier; disadvantage on Stealth.
• Leather: 11 + Dexterity modifier.
• Studded leather: 12 + Dexterity modifier.

Medium Armor

• Chain shirt: 13 + Dexterity modifier; disadvantage on Stealth only if also wearing heavy armor.
Scale mail: 14 + Dexterity modifier; disadvantage on Stealth.Breastplate: 14 + Dexterity modifier (Dex modifier capped at +2); disadvantage on Stealth.Half plate: 15 + Dexterity modifier (Dex modifier capped at +2); disadvantage on Stealth.

Heavy Armor

• Ring mail: 14; disadvantage on Dexterity checks for Stealth.
• Splint: 17; speed 25 ft.; disadvantage on Dexterity checks for Stealth.
• Plate: 18 + Dexterity modifier (Dex modifier capped at +2); speed 25 ft.; disadvantage on Stealth.

Ability Scores, Proficiency, and Armor Effectiveness

Using armor effectively is not only about AC numbers; it interacts with ability scores, class features, and proficiency. Characters without proficiency in a given armor type cannot add their proficiency bonus to AC while wearing it, which can make even heavy armor less attractive for some builds. Additionally, certain races and class features modify how armor feels mechanically. For example, Barbarians have a base AC of 10 + Dexterity modifier + Constitution modifier without armor or shield, whereas Monks have unique unarmored defense that can outperform some armors at higher levels. Understanding these nuances helps avoid surprises at the table and supports smarter character decisions.

Shields, Other Defenses, and Interactions

Shields are a simple and powerful way to boost AC, granting a +2 shield bonus to AC when you are proficient with them. They can be combined with most armor types unless a class or feature states otherwise. When a character uses both armor and a shield, their AC is determined by adding the armor’s bonus, the shield’s bonus, and any applicable modifiers such as Dexterity (within the armor’s cap). Natural armor, such as a troll’s Regeneration, and class features like Barbarian Unarmored Defense, also provide AC but may have specific rules about shields. Being aware of how these systems interact helps you compare armor choices accurately.

Special Conditions, Damage Resistance, and Vulnerabilities

Some armor comes with special conditions or keyword traits, such as being magic, having the Sturdy property, or interacting with spells like Armor of Agathys. Certain magical armors may grant resistance to specific damage types, conditional immunities, or enhanced movement, but they can also introduce drawbacks like stealth penalties or concentration requirements. It is important to read the full description of any uncommon or magical armor and confirm with your DM whether homebrew adjustments are in place. Likewise, effects that target armor—such as the Piercer fighting style or certain spells—can bypass resistances if they explicitly state they ignore resistance or immunity.

Acquiring, Maintaining, and Modifying Armor

Acquiring armor in 5e can be done through starting equipment, class features, treasure, or crafting, depending on your table’s rules. Costs vary widely: simple gear like leather armor typically costs 10 gp, while masterwork or magical items can run into hundreds or thousands of gold. Mundane armor generally requires no maintenance beyond basic care, whereas magical armor may demand periodic attunement, special components, or in-world rituals. The rules for repairing and modifying armor exist, though many groups treat armor as consumed by adventure wear and replace it as the story demands. If your table uses downtime or crafting rules, know the base price and time requirements before committing to a purchase or upgrade.

Frequently Asked Questions and Edge Cases

Players often wonder whether wearing armor they are not proficient with breaks the game or whether certain features interact oddly with armor. Some features, like the Fighter’s Second Wind or the Bard’s Inspiration, are not affected by armor restrictions. Other features, such as Barbarian Unarmored Defense, specify conditions under which they stop working if you wear armor or hold a shield. Always check the exact wording of class features when evaluating armor choices. Similarly, effects that impose penalties to Strength or Dexterity can indirectly affect AC if your armor bonus depends on those modifiers, so tracking changes to your scores is as important as tracking the armor rating itself.

Tactical Considerations and Loadout Planning

Choosing the right armor involves balancing AC, mobility, and roleplay. If your character needs to hide frequently, avoid armor with the Disadvantage on Stealth or plan around features that remove that penalty. If facing high-damage encounters, consider heavy armor or multi-layered defenses such as shields, temporary hit points, or damage reduction abilities. For spellcasters who also want some defense, light or medium armor with high Dexterity can provide a comfortable middle ground. When planning a loadout, think about downtime, resupply, how your armor looks at the table, and whether your DM uses encumbrance rules that could affect your day-to-day effectiveness.