Adamantine Armor (Half Plate)
D&D 5e · 2014·Medium armor·Uncommon·No attunement
Add your Dexterity modifier, up to +2. A negative modifier still lowers it.
Armor Class calculator
- Category
- Medium armor
- Dex bonus
- Max +2
- Stealth
- Disadvantage
- Strength
- None
- Weight
- 40 lb
- Don / doff
- 5 minutes / 1 minute
- Rarity
- Uncommon
- Price
- Not specified
Magic: Critical Hits against you become normal hits while you wear this armor. Adamantine adds no bonus to AC.
Calculator assumptions & rules
Uses this entry’s AC formula, Dexterity cap and listed shield bonus. Magic AC already included in the entry is counted once. Features, spells, alternative AC formulas and exceptions to Strength penalties are excluded. You still need the required armor training or proficiency.
Changing calculator inputs does not change the item’s rules or create a new page URL.
Adamantine Armor AC by armor type
Choose a published armor variant to see its full statistics and calculator for this edition.
| Armor | Armor Class | Stealth |
|---|---|---|
| Breastplate | 14 + Dex (max 2) | — |
| Chain Mail | 16 | Disadvantage |
| Chain Shirt | 13 + Dex (max 2) | — |
| Half Plate | 15 + Dex (max 2) | Disadvantage |
| Plate Armor | 18 | Disadvantage |
| Ring Mail | 14 | Disadvantage |
| Scale Mail | 14 + Dex (max 2) | Disadvantage |
| Splint Armor | 17 | Disadvantage |
What Adamantine Armor does
- This armor starts at AC 15 and caps a positive Dexterity modifier at +2. A negative modifier still reduces AC.
- It imposes Disadvantage on Stealth checks; consider that cost if the group relies on sneaking.
- Critical-hit protection changes incoming critical hits to normal hits; it does not add AC or prevent the ordinary damage from a hit.
This suit of armor is reinforced with adamantine, one of the hardest substances in existence. While you're wearing it, any critical hit against you becomes a normal hit. This is the Half Plate variant.
Full item details & properties
Magic properties
- Activation
- Wear this armor.
- Consumable
- No
- Critical-hit protection
- Critical Hits against you become normal hits while wearing this armor.
Armor details
- Armor Class
- 15 + Dex modifier (max 2)
- Category
- Medium
- Dexterity modifier
- Maximum +2
- Strength to avoid Speed penalty
- No threshold
- Stealth disadvantage
- Yes
- Don
- 5 minutes
- Doff
- 1 minute
Tags & related references
Compare alternatives
Same edition, using your calculator inputs above. Special properties and character features can change the choice.
Same base armor; compare magical benefits
Armor of Resistance (Half Plate)AC 1715 + Dex (max +2) AC · Stealth DisadvantageNot specified · 40 lbSame base armor; compare magical benefits
Half PlateAC 1715 + Dex (max +2) AC · Stealth Disadvantage750 GP · 40 lbSame base armor; compare magical benefits
Adamantine Armor (Breastplate)AC 1614 + Dex (max +2) AC · No armor Stealth penaltyNot specified · 20 lbSame armor category; compare AC and Stealth
Adamantine Armor FAQ
What Armor Class does Adamantine Armor (Half Plate) give?
It starts at AC 15. Add your Dexterity modifier, up to +2. A negative modifier still lowers AC.
Does Adamantine Armor require attunement?
No. This entry does not require attunement; follow its activation and use rules.
Does Adamantine Armor prevent all damage from a critical hit?
No. The Critical Hit becomes a normal hit. The attack still deals its normal damage; this property does not prevent the hit or add Armor Class.
Is the listed price a guaranteed purchase price?
The source does not specify a price for this entry. Ask your GM about availability and cost.