A critical strike is a basic attack that deals twice its normal damage. In the real world, it's an attack striking a vulnerable area, while in other MMO and/or RPG settings, it ties into the very common "critical hit" mechanic.
It only applies to basic attacks or certain abilities like 
Gangplank's 
Parrrley and 
Yasuo's 
Steel Tempest that act like a basic attack or 
Garen's 
Judgment and 
Master Yi's 
Alpha Strike, which are specially stated. It's important to note that you cannot score a Template:Cctip against a building such as a turret or inhibitor (Except 
Jhin, whose fourth shot receives minicrits against all structures).
Most champions have different attack animations for a Template:Cctip, though some do not; this includes mages and other champions not meant to be built using basic attacks for damage. Some of these champions performing a Template:Cctip (if built being able to perform them) may instead have a soundbite that plays in place of an animation, typically a grunt of effort.
Template:Cctip is valuable for all champions who primarily deal damage with automatic attacks, rather than through abilities. Some champions, such as 
Ashe, have an affinity for critical hits and benefit more from items that improve them. Players can increase the Chance and the Damage of Template:Cctip with items, abilities, and runes.
Chance
Critical strike chance, as the name states, is the chance of a champion's physical attacks dealing a critical strike. Critical strike chance stacks additively. Runes, items and all abilities can increase critical strike chance.
When averaged over a large number of autoattacks and at Base critical damage (100% bonus damage), critical strike chance is essentially a damage multiplier where each 1% of critical chance adds 1% bonus damage. Thus at 50% critical strike chance a champion will be doing (on average) 150% damage with autoattacks, not counting Bonus critical strike damage. Because of this, critical strike chance scales well with both attack damage and attack speed. The formula for this damage multiplier is given by:
Damage multiplier = 1 + (Critical chance × (1 + Bonus critical damage))
The maximum critical strike chance you can reach at level 1 through masteries is 20.25%, excluding abilities and items, and is hard capped at 100%.
Critical strike chance has a theoretical gold value of 
40 per 1% critical strike chance. This makes 
Brawler's Gloves the most efficient core item for critical strike chance, as it grants +10% critical chance for the cost of 400 with a 40 per 1% critical chance efficiency. Note that 
Cloak of Agility has the same efficiency.
Increasing critical strike chance
Items
Template:Stat table header Template:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table rowTemplate:Item table row Template:Stat table footer
 |
|
|---|
Temporary Effects
- Template:Ile
Champion abilities
Note: Any ability boosting attack speed has an indirect impact on the number of crits.
Fiora's Bladework grants her 100% critical chance on her next second attack.- Jhin's Whisper grants him 100% critical chance every fourth autoattack, and Curtain Call also has a guaranteed 100% critical chance on its fourth and final shot.
- Pantheon's Certain Death grants him 100% critical chance against targets below 15% of their maximum health.
- Shaco's Deceive grants him 100% critical chance on his next attack.
- Tryndamere's Battle Fury grants him 0.35% critical chance per point of Fury he currently has.
- Xin Zhao's Battle Cry grants him 100% critical chance on every 3rd auto attack.
- Yasuo's Way of the Wanderer grants him twice the amount of critical chance.
Runes
| Name | Type | Tier 1 (Lesser) | Tier 2 (Normal) | Tier 3 (Greater) |
|---|---|---|---|---|
| Critical Chance | Mark
|
X | X | 0.93 %
410 |
| Seal
|
X | X | 0.42 %
410 | |
| Glyph
|
X | X | 0.28 %
410 | |
| Quintessence
|
X | X | 1.86 %
1025 |
Damage
Critical strike damage refers to the amount of damage that a champion's Template:Cctip will deal. All champions have 200% critical strike damage by default, except Ashe with 110% damage, Jhin with 150% (further reduced vs structures) and Yasuo with 180%. In most cases, critical strike damage stacks additively. Damage modifiers apply to critical strike damage normally.
Modifying Critical Strike Damage
- Champion Abilities
- Ashe's Frost Shot modifies her base critical damage to 110% + (Critical Chance × (1 + Bonus Critical Damage))
- Fiora's Bladework modifies her base critical damage to 140 / 155 / 170 / 185 / 200% from the default of 200%.
- Jhin's Whisper multiplicatively reduces his total critical damage by 25% for basic attacks.
- Shaco's Deceive modifies his base critical damage to 140 / 160 / 180 / 200 / 220% from the default of 200%.
- Xin Zhao's Battle Cry modifies his base critical damage to 125 / 137.5 / 150 / 162.5 / 175% from the default of 200%.
- Yasuo's Intent multiplicatively reduces his total critical damage by 10% for basic attacks and 25% for Steel Tempest (e.g. 200% to 190% / 175%).
Items
- Summoner's Rift, Howling Abyss Template:Ile
Runes
| Name | Type | Tier 1 (Lesser) | Tier 2 (Normal) | Tier 3 (Greater) |
|---|---|---|---|---|
| Critical Damage
(% of Attack Damage; additive with |
Mark
|
X | X | 2.23 %
820 |
| Seal
|
X | X | 0.78 %
820 | |
| Glyph
|
X | X | 0.56 %
820 | |
| Quintessence
|
X | X | 4.46 %
1025 |
Notes
- The maximum bonus critical strike damage obtainable is as follows:
- Runes: 45.51%
- Items: 50%
- For most champions, the maximum critical strike damage available is 200% for a total of amount of 295.51% AD on their Template:Cctip.
- Including the additional 20% base critical strike damage from rank-5 Deceive, and his innate passive Backstab, Shaco's will deal 335.51% AD on his Template:Cctip.
- Ashe with 100% critical strike chance will deal 328.265% AD on her Template:Cctip thanks to her innate passive Frost Shot.
- Including the additional 20% base critical strike damage from rank-5
Skills affected by Critical Chance
Certain skills are capable of Template:Cctip and/or are affected by critical chance.
- Most of them only do bonus 100% AD × (Total critical damage − 100%) if Template:Cctip.
- Blitzcrank's Power Fist
- Caitlyn's Headshot: Against champions.
- Darius' Crippling Strike
- Draven's Spinning Axe
- Gangplank's Parrrley
- Garen's Decisive Strike
- Jinx's Switcheroo!
- Nautilus' Staggering Blow
- Nidalee's Takedown: Magic damage, benifiting from Life steal.
- Nocturne's Umbra Blades
- Quinn's Harrier
- Renekton's Ruthless Predator: Only applicable to first hit.
- Rengar's Savagery
- Riven's Runic Blade
- Shyvana's Twin Bite: Only applicable to first hit.
- Talon's Noxian Diplomacy
- Trundle's Chomp
- Vayne's Tumble
- Viktor's Discharge: Magic damage, benifiting from Life steal.
- Volibear's Rolling Thunder
- Wukong's Crushing Blow
- Xin Zhao's Three Talon Strike
- Others
- Caitlyn's Headshot: Template:Cctip do bonus 250% AD × (Total critical damage − 100%) against minions and monsters.
- Garen's Judgment: Template:Cctip do bonus entire damage portion × (Total critical damage − 100%).
- Jayce's Hyper Charge: Template:Cctip do bonus entire damage × (Total critical damage − 100%).
- Jhin's Curtain Call: The File:Curtain Call Final Shot.png final shot is a Template:Cctip, doing bonus entire damage × (Total critical damage − 100%).
- Lucian's Lightslinger: The additional shot does bonus entire damage × (Total critical damage − 100%) if it is a Template:Cctip.
- Master Yi's Double Strike: The additional strike does bonus 50% AD × (Total critical damage − 100%) if it is a Template:Cctip.
- Alpha Strike: Template:Cctip do bonus 60% AD × (Total critical damage − 100%).
- Miss Fortune's Bullet Time: Each wave can Template:Cctip, dealing 20% × (Total critical damage − 100%) bonus damage.
- Nasus' Siphoning Strike: Template:Cctip do bonus base damage × (Total critical damage − 100%).
- Yasuo's Steel Tempest: Template:Cctip do bonus 75% AD × (Total critical damage − 100%).
- Additions
- Shaco's Backstab: Template:Cctip do increased damage after critical modifier.
- Talon's Mercy: Template:Cctip do increases damage after critical modifier.
- Tryndamere's Spinning Slash: Cooldown is reduced by 1 second for every Template:Cctip. This effect is doubled against champions.
Miscellaneous
Other skills that are not being affected by critical strikes and chances are displayed as a critical strike due to other reasons.
- Affected by Critical strike damage
- Fiora's Bladework: Causes next second auto-attack to deal increased damage, which is described as a Template:Cctip.
- Shaco's Deceive: Causes next auto-attack during the next 6 seconds to deal increased damage, which is described as a Template:Cctip.
- Pantheon's Spear Shot: Will Template:Cctip for a + 100% damage bonus due to the passive from Certain Death if the target is under 15% health.
- Unaffected by Critical strike damage
- Anivia's Frostbite: The 2 × damage modifier applied by being chilled by Flash Frost is given out as Template:Cctip.
- Gangplank's Powder Keg: The damage is always given out as Template:Cctip.
- Gnar's GNAR!: The damage is given out as Template:Cctip when enemy hits terrain.
- Gragas' Barrel Roll: The damage is given out as Template:Cctip when the cask ferments after 2 seconds.
- Karthus' Lay Waste: Appears like a Template:Cctip when acting like a single target spell (hitting only one enemy).
- Miss Fortune's Double Up: The second damage is given out as Template:Cctip when the first target is killed.
- Soraka's Starcall: The damage is given out as Template:Cctip when enemy stands in the center.
- Vayne's Condemn: The double-damage applied by being knocked into a wall is given out as Template:Cctip.
- Vladimir's Transfusion: The extra damage applied when under the effect of Crimson Rush is given out as a Template:Cctip.
- Ziggs' Satchel Charge: The damage is given out as a Template:Cctip when used to hexplode a tower.
Trivia
- Similarly in many MMO settings, a number of attack damage-based assassins or secondary assassin-based champions also benefit from high critical strike chance in varying form, as a means to help finish off targets faster as well as to deal more damage in bursts overall.
- The fastest way to obtain 100% critical strike chance is with Yasuo, requiring only 1200:
- Runes: +20.25% Critical Strike Chance
- 9 × Marks of Critical Strike Chance (+0.93% × 9 Critical Strike Chance)
- 9 × Seals of Critical Strike Chance (+0.42% × 9 Critical Strike Chance)
- 9 × Glyphs of Critical Strike Chance (+0.28% × 9 Critical Strike Chance)
- 3 × Quintessences of Critical Strike Chance (+1.86% × 3 Critical Strike Chance)
- 9 ×
- Items: +30% Critical Strike Chance
- Brawler's Gloves (+10% Critical Strike Chance)
- Cloak of Agility (+20% Critical Strike Chance)
- Critical Strike Chance Amplification: 100% Critical Strike Chance
- Way of the Wanderer (+ 100% Critical Strike Chance)
- Relevant mathematics:
- Yasuo Critical Strike Chance = (20.25% + 30%) × 2 = 100.5% critical chance
| Offensive |  Ability power ·  Attack damage ·  Attack speed ·  Critical strike chance ·  Critical strike damage ·  Armor penetration ·  Magic penetration ·  Life steal ·  Omnivamp · Physical vamp ·  True damage
|
|---|---|
| Defensive |  Heal and shield power ·  Health ·  Health regeneration ·  Armor ·  Magic resistance ·  Tenacity ·  Slow resist
|
| Utility |  Ability haste ·  Energy ·  Energy regeneration ·  Mana ·  Mana regeneration  Movement speed ·  Range
|
| Other |  Experience ·  Gold generation
|