View source for Accuracy, Evasion and Criticals

{{CombatPortal}}

'''Accuracy, Evasion, and Criticals''' are three mechanics intertwined together, representing the ability of a ship to hit another one. The formulas presented on this page are still subject to change as more testing is done. 
*'''Please note that all formulas between <math>\lfloor \ \rfloor</math> are rounded down.

='''Hit Rate'''=
The '''hit rate''' is the probability of an attack hitting the target. It's the same for all attacks as well as abyssals. It stems from the difference between the Accuracy of the attack and the evasion of the target.

{|class="wikitable mw-collapsible mw-collapsed" width="100%"
!Hit Rate
|-
|
{|style="padding:10px; margin:20px; border:1px solid orange; border-radius:10px"
|valign="center"| <math>\text{Hit %} = \bigl\lfloor \text{Hit}_\text{cap} \bigr\rfloor + \text{Acc}_\text{proficiency} +1</math>
|}

Where, the Capped Hit Rate <math>\left( \text{Hit}_\text{cap} \right)</math> is:
{|style="padding:10px; margin:20px; border:1px solid orange; border-radius:10px"
|valign="center"| <math>\text{Hit}_\text{cap} = MIN \Big[ \big( MAX \big[ ( \text{Accuracy}_\text{atk} - \text{Evasion}_\text{post-cap} ) ; {\color{tomato} \text{10}} \big] \times \text{Morale}_\text{defender} \big) ; {\color{DeepSkyBlue} \text{96}} \Big]</math>
|}

;With
* <math>\text{Accuracy}_\text{atk}</math> the calculated accuracy of the attack. Please see [[#Accuracy|below]] for the various accuracy formulas.
* <math>\text{Evasion}_\text{post-cap}</math> the calculated evasion of the defending ship. Please see [[#Evasion|below]] for the evasion formula.
** If negative, it is still applied the same way, increasing the hit rate.
* <math>\text{Morale}_\text{defender}</math> the morale state modifier of the defending ship. Morale is referring to the value of attacking timing, not the value before entering battle. Please see [[Morale_and_Fatigue#Morale Effects|Morale and Fatigue]] for more details.
** Sparkled is '''0.7''',
** Normal is '''1.0''',
** Orange is '''1.2''',
** Red is '''1.4'''.
* <math>\text{Acc}_\text{proficiency}</math> the '''average''' plane proficiency accuracy bonus. Please see [[Plane Proficiency]] for more details.
** The average is calculated only from dive bombers, torpedo bombers, seaplane bombers and large flying boats.
** The value is '''12''' for {{Double Chevron}} planes.

;Hit Rate Caps
By following this formula, the hit rate is:
* '''10''' at minimum,
* '''96''' at maximum.
|}

;Notes
* Hit rate has an effective '''minimum of 11%''' and a '''maximum of 97%'''.
* Plane proficiency is the only factor that allows a ship to go beyond 100% hit rate.
* The effect of sparkle is reduced the closer '''Hit rate''' is to the caps.

==Critical Hit Rate==
'''Critical Hits''' are hits that do more damage than normal. The critical hit rate stems directly from hit rate with different proportion depending on the attack type.
{{Formula
|Title=Critical Rate
|Math={Crit}_\text{rate} = \lfloor \text{Mod}_\text{type} \times \sqrt{\text{Hit}_\text{cap} + \text{Acc}_\text{proficiency} } \rfloor + \text{Crit}_\text{proficiency} + 1
|Var=<math>{Mod}_\text{type}</math> the attack type modifier :
{{{!}}class="wikitable" style="text-align:center"
!colspan=2{{!}}<math>{Mod}_\text{type}</math>
{{!}}-
!Attack type
!Attack modifier
{{!}}-
{{!}}Shelling
{{!}}rowspan=2{{!}}1.3
{{!}}-
{{!}}ASW
{{!}}-
{{!}}Torpedo
{{!}}1.5
{{!}}-
{{!}}Airstrike
{{!}}0
{{!}}-
{{!}}Night Battle<ref>Carrier Night Air Attacks (NB CVCI) use the night battle Mod.</ref>
{{!}}<math>1.5 + \text{Const}_\text{contact}</math>
{{!}}-
{{!}}Shelling Support
{{!}}1.0
{{!}}-
{{!}}Airstrike Support
{{!}}0.2<ref>Based on KanColle Kai datamine, unconfirmed if also 0 like regular Airstrike in browser version</ref>
{{!}}}
* <math>\text{Const}_\text{contact}</math> the night contact constant from {{Night Recon}} {{Equipment/Link|Type 98 Reconnaissance Seaplane (Night Recon)|Type 0 Reconnaissance Seaplane Model 11B Kai (Night Recon)|Loire 130M|text=Night Recons|link_category=Night Recon}}, its value depends on the {{Hit}} stat of the {{Night Recon}} if night contact is triggered, and '''0''' otherwise,

{{{!}}class="wikitable mw-collapsible mw-collapsed" style="text-align:center"
!colspan=2{{!}}<math>\text{Const}_\text{contact}</math>
{{!}}-
!{{Hit}}
!Contact constant
{{!}}-
{{!}}1{{!}}{{!}}0.07
{{!}}-
{{!}}2{{!}}{{!}}0.14
{{!}}-
{{!}}3{{!}}{{!}}0.21
{{!}}}

* <math>\text{Hit}_\text{cap}</math> the Hit Rate Cap defined [[#Hit Rate|above]],

* <math>\text{Acc}_\text{proficiency}</math> the '''average''' plane proficiency accuracy bonus. Please see [[Plane Proficiency]] for more details.
** The average is calculated only from dive bombers, torpedo bombers, seaplane bombers and large flying boats.
** The value is '''12''' for {{Double Chevron}} planes.

* <math>\text{Crit}_\text{proficiency}</math> the '''plane proficiency''' critical bonus. See ''[[Plane Proficiency#Critical Bonus|here]]'' for more details.
<references/>
}}

===Hit Rate & Critical Roll===
There is a single roll for both normal and critical hits.

For example, for a hit rate of ''50%'' on a shelling attack, the crit rate is then ''10%''. The roll can be represented as followed:

{|class="wikitable" width="75%" style="margin:auto"
!colspan=3|Roll Example
|-
!width=10% style="background:yellow; color:black"|Critical Hit 10%
!width=40% style="background:lime; color:black"|Hit 40%
!width=50% style="background:red; color:black"|Miss 50%
|}
The normal hit rate is 40% and the remaining 10% is the critical hit rate.

;Notes
* The effect of accuracy and sparkling on crit rate is limited
* Because it stems directly from hit rate, it is also affected by the caps.
* With low accuracy, a disproportionately high amount of successful hits will be "criticals".
* With proficiency bonus it's possible to have a crititical rate above the hit rate, in this case the critical rate override the hit rate.[http://twillwave256.livedoor.blog/archives/20106094.html]

===Damage Animations===
When a ship takes a hit, the game will display the damage animation following in 3 possible outcomes (e.g. with 25 damage):
* {{TextGlow|'''miss'''|red|text-colour=white|glow-size=2px}} (no damage),
* {{TextGlow|'''25'''|red|text-colour=white|glow-size=2px}} (normal damage)
* {{TextGlow|'''25 Critical hit!'''|GoldenRod|text-colour=yellow|glow-size=2px}} (critical damage).

However, the damage status displayed is mostly defined by the amount of damage dealt, and not the real damage status happening in the game.
*Due to this, displayed critical hits and misses are rarely true critical hits or misses.

The displayed damage status is as follows:
{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center"
!colspan=2|Display Behavior
|-
!Damage Dealt
!Damage Displayed
|-
|Miss
|Miss displayed normally
|-
|0
|Always displayed as a {{TextGlow|'''miss'''|red|text-colour=white|glow-size=2px}}
|-
|≤14
|Never displayed as {{TextGlow|'''Critical hit!'''|GoldenRod|text-colour=yellow|glow-size=2px}}
|-
|[15;39]
|Criticals displayed normally
|-
|≥40
|Always displayed as {{TextGlow|'''Critical hit!'''|GoldenRod|text-colour=yellow|glow-size=2px}}
|}

;Notes
*A patch exists to fix this misleading behavior and display the real damage status, see ''[[Help:3rd Party Software#Patches|here]]''.

='''Accuracy'''=
Below are the common variables used in all accuracy formulas:

* <math>\text{Level}</math> is the level of the attacking ship.
* <math>\text{Luck}</math> is the luck {{Luck}} of the attacking ship.
* <math>\text{Acc}_\text{equip} = \text{Acc}_\text{equip base} + \text{Acc}_\text{equip bonus} + \text{Acc}_\bigstar</math> is the total accuracy {{Hit}} provided by an equipment, with:
** <math>\text{Acc}_\text{equip base}</math> is the base accuracy {{Hit}} of the equipment,
** <math>\text{Acc}_\text{equip bonus}</math> is the [[Equipment Bonuses|visible]] accuracy {{Hit}} bonuses,
*** [[Equipment_Bonuses#Partially_functional|Confirmed included for Day Shelling, excluded for Support Shelling, other phases unconfirmed]]
** <math>\text{Acc}_\bigstar</math> is the equipment's accuracy {{Hit}} gained from [[Improvement]],
* <math>\text{Mod}_\text{fit}</math> is the [[Hidden Fit Bonuses]] bonuses or penalties when applicable.
* <math>\text{Mod}_\text{formation}</math> is the formation modifier for the applicable attack. ''See [[Combat#Formation Selection|Combat]] for more details.''
** Modifiers for single fleet against combined fleet are unknown.

{|class="wikitable mw-collapsible mw-collapsed"
!colspan=5|<math>\text{Mod}_\text{formation}</math>
|-
!Formation
!Day Shelling &<br>Carrier Attacks
!Torpedo Attacks
!ASW <ref>https://twitter.com/Divinity_123/status/1453371971446743045</ref>
!Night Battles<ref>https://twitter.com/Divinity_123/status/1680199577989685251</ref>
|-
|Line Ahead||1.0||1.0||1.0||1.0
|-
|Double Line||1.2||0.8||1.2||0.9
|-
|Diamond||1.0||0.4||1.0||0.7
|-
|Echelon||1.2||0.75||1.2||0.9
|-
|Line Abreast||1.2||0.3||1.2||0.8
|-
|Vanguard (Top)||0.8||0.7||1.0||0.8
|-
|Vanguard (Bottom)||1.2||0.9||1.1||1.2
|-
!Colspan=5|Exception
|-
|Vanguard (Top) vs DD||{{ToolTip|0.88|0.8 * 1.1}}||{{ToolTip|0.84|0.7 * 1.2}}||N/A||{{ToolTip|0.88|0.8 * 1.1}}
|-
|Vanguard (Bottom) vs DD||{{ToolTip|1.32|1.2 * 1.1}}||{{ToolTip|1.08|0.9 * 1.2}}||N/A||{{ToolTip|1.32|1.2 * 1.1}}
|-
|Double Line vs Line Abreast||rowspan=3|1.0||rowspan=3|-||rowspan=3|1.0||rowspan=3|-
|-
|Echelon vs Line Ahead
|-
|Line Abreast vs Echelon
|-
|Echelon vs Combined Fleet||-||0.6||-||0.8?
|-
!Colspan=5|Combined Fleet<ref>https://twitter.com/Divinity_123/status/1470001784009773057</ref>
|-
|Combined Fleet Cruising Formation 1||0.9||?||1.25||?
|-
|Combined Fleet Cruising Formation 2||1.0||1.0||?||0.9
|-
|Combined Fleet Cruising Formation 3||0.8||0.4?||?||0.7
|-
|Combined Fleet Cruising Formation 4||1.1||1.2||?||1.0
|}
* <math>\text{Mod}_\text{vanguard}</math> is an accuracy malus when the opposite fleet is in Vanguard formation. See ''[[#Vanguard Formation|below]]'' for more details.
** It is still unknown if this affects night battles, airstrikes, ASW, or LBAS.

* <math>\text{Mod}_\text{morale}</math> is the morale modifier of the attacking ship. Morale is referring to the value of attacking timing, not the value before entering battle. ''See [[Morale_and_Fatigue#Morale Effects|Morale and Fatigue]] for more details''.
{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center"
!colspan=2|<math>\text{Mod}_\text{morale}</math>
|-
|Sparkled||1.2
|-
|Normal||1.0
|-
|Orange||0.8
|-
|Red||0.5
|}

*<math>\text{Mod}_\text{smoke}</math> is an accuracy malus when {{Smoke}} [[Smoke Generator]]s are used.
**{{Color|red|Please note that these are initial estimations and are subject to change.}}
** It is currently unknown if the airstrike accuracy is affected by the smoke.
** Some modifiers are impossible to determine because the fleet hit the lower bound hit rate (11% hard cap).
** There are some inconsistencies between "old" and "new" enemies.
** Having a ([[Surface Radar|surface ?]]) [[radar]] equipped reduces the smoke effect for both fleets, but only for the shelling phase.
{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center"
!colspan=5|<math>\text{Mod}_\text{smoke}</math><ref>https://twitter.com/Divinity_123/status/1707331554228195746</ref>
|-
!colspan=5|Day Shelling
|-
!Fleet!!Radar Equipped!!Type 1!!Type 2!!Type 3
|-
|rowspan=2|Allied
|No||< 0.3||<0.33||<0.37
|-
|Yes||0.35||0.25||< 0.37
|-
|rowspan=2|Enemy
|No||< 0.69||< 0.7||<0.7
|-
|Yes||0.91||0.83||0.75
|-
!colspan=5|Torpedo Phase
|-
!colspan=2|Fleet!!Type 1!!Type 2!!Type 3
|-
|colspan=2|Allied||0.45||0.42||0.42
|-
|colspan=2|Enemy||0.7||0.6||0.5
|-
!colspan=5|ASW
|-
|colspan=2|Allied||colspan=3|0.25
|-
|colspan=2|Enemy||colspan=3|~1.0?<ref>https://twitter.com/about6833/status/1658101370430574592</ref>
|}

;Notes
* Because of the number of modifiers to accuracy in-game, it is not trivial to increase accuracy. Therefore it is '''more important''' to prioritize attack power (firepower, torpedo, ASW, airstrike, LBAS, ...).
<references/>

==Combat==
''In no particular order.
{|class="wikitable mw-collapsible mw-collapsed" width="100%"
!Daytime Shelling
|-
|
This formula applies to both surface shelling and carrier attacks during daytime combat. It does not apply to carrier airstrikes.
{|style="padding:10px; margin:20px; border:1px solid orange; border-radius:10px"
|valign="center"|  <math>\text{Accuracy}_\text{shelling} = \bigg\lfloor \bigg( \Big( \text{Acc}_\text{base} + 2 \times \sqrt{\text{Level}} + 1.5 \times \sqrt{\text{Luck}} + \sum_{\text{All Equips}} \text{Acc}_\text{equip} + \text{Mod}_\text{Amagiri} \Big) \times \text{Mod}_\text{vanguard} \times \text{Mod}_\text{formation} \times \text{Mod}_\text{morale} + \text{Mod}_\text{fit} \bigg) \times \text{Mod}_\text{spotting} \times \text{Mod}_\text{AP} \times \text{Mod}_\text{smoke} \bigg\rfloor </math>
|}

;With
* <math>\text{Acc}_\text{base}</math> the base accuracy value of the attack.

{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center; margin:auto"
!colspan=4| Fleet type base accuracy values<ref>https://twitter.com/Divinity_123/status/1470001784009773057</ref>
|-
!rowspan=2 colspan=2|'''Attacker'''!!colspan=2|Defender
|-
| '''Single Fleet'''|| '''Combined Fleet'''
|-
!rowspan=7|Player
| '''Single Fleet'''|| 90|| 80
|-
| '''CTF Main'''|| 78|| 78
|-
| '''CTF Escort'''|| 45|| 67
|-
| '''STF Main'''|| 45|| 78
|-
| '''STF Escort'''|| 67|| 67
|-
| '''TCF Main'''|| 54|| 54
|-
| '''TCF Escort'''|| 45|| 67
|-
!rowspan=3|Abyssal
| '''Single Fleet'''|| 90
|
{|class="wikitable"
! CTF Main|| CTF Escort
|-
| 88|| 65
|-
! STF Main|| STF Escort
|-
| 65|| 75
|-
! TCF Main|| TCF Escort
|-
| 88|| 65
|}
|-
| '''Combined Main'''|| 90|| 88
|-
| '''Combined Escort'''|| 75|| 75
|}

* <math>\text{Mod}_\text{Amagiri}</math>is a bonus against [[PT boat]]:
** '''65''' for {{Ship/Link|Amagiri/Kai Ni|Amagiri/Kai Ni D|text=Amagiri Kai Ni/D}}
** '''35?''' for [[DD]] and [[DE]] adjacent to Amagiri Kai Ni/D.
** '''0''' otherwise.

* <math>\text{Mod}_\text{spotting}</math> the artillery spotting / CVCI bonus if applicable. See ''[[Combat/Artillery Spotting#Setups and Attack Types|here]]'' for more details.

{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center; margin:auto"
!colspan=6|<math>\text{Mod}_\text{spotting}</math>
|-
!colspan=6|Artillery Spotting
|-
!Attack Type
!Prerequisites
![[Damage_Calculations#Damage_Formula|Post-cap]]<br>Damage<br>Modifier
!Accuracy<br>Modifier
!Hits
!Notes
|-
!style="background-color:#ff7f50" |{{color|black|Main Zuiun Cut-in<br>(Zuiun CI)}}
|{{RedGunHeavy}}{{ZuiunPlane}}{{ZuiunPlane}}
|1.35||?||1
|rowspan=2|{{Ship/Link|Ise/Kai Ni|Hyuuga/Kai Ni|text=''Ise''-class Kai Ni|link_class=Ise}} only
|-
!style="background-color:#ff7f50" |{{color|black|Main Suisei Cut-in<br>(Suisei CI)}}
|{{RedGunHeavy}}{{RedPlane}}{{RedPlane}}
|1.3||?||1
|-
!style="background-color:#81c784" |{{color|black|Main AP Shell Cut-in<br>(APCI)}}
|{{RedGunHeavy}}{{RedGunHeavy}}{{Seaplane}}{{RedAmmo}}
|1.5||1.2||1
|
|-
!style="background-color:gold"|{{color|black|Secondary AP Shell Cut-in<br>(Sec APCI)}}
|{{RedGunHeavy}}{{YellowGun}}{{Seaplane}}{{RedAmmo}}
|1.3||1.3||1
|
|-
!style="background-color:gold"|{{color|black|Secondary Radar Cut-in<br>(Radar CI)}}
|{{RedGunHeavy}}{{YellowGun}}{{Seaplane}}{{Radar}}
|1.2||1.5||1
|
|-
!style="background-color:gold"|{{color|black|Secondary Cut-in<br>(Sec CI)}}
|{{RedGunHeavy}}{{YellowGun}}{{Seaplane}}
|1.1||1.3||1
|
|-
!style="background-color:#59f"|{{color|black|Double Attack<br>(DA)}}
|{{RedGunHeavy}}{{RedGunHeavy}}{{Seaplane}}
|1.2||1.1||2
|
|-
!colspan=6|CVCI
|-
!Attack Type
!Prerequisites
![[Damage_Calculations#Damage_Formula|Post-cap]]<br>Damage<br>Modifier
!Accuracy<br>Modifier
!Hits
!Note
|-
!style="background-color:#81c784" |{{color|black|Fighter-Bomber-Attacker<br>(FBA)}}
|nowrap|{{GreenPlane}}{{RedPlane}}{{BluePlane}}
|1.25||1.2~1.3?||1||
|-
!style="background-color:#81c784" |{{color|black|Bomber-Bomber-Attacker<br>(BBA)}}
|nowrap|{{RedPlane}}{{RedPlane}}{{BluePlane}}
|1.2||1.2~1.3?||1||
|-
!style="background-color:#81c784" |{{color|black|Bomber-Attacker<br>(BA)}}
|nowrap|{{RedPlane}}{{BluePlane}}
|1.15||1.2~1.3?||1||
|}

* <math>\text{Mod}_\text{AP}</math> the {{RedAmmo}} {{Equipment/Link|Type 91 Armor Piercing Shell|Type 1 Armor Piercing Shell|Type 1 Armor Piercing Shell Kai|text=AP Shells|link_category=Armour-Piercing Shells}} accuracy modifier:
{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center; margin:auto"
!colspan=2|<math>\text{Mod}_\text{AP}</math>
|-
!Type!!Modifier
|-
|{{RedAmmo}}{{RedGunHeavy}}||1.1
|-
|{{RedAmmo}}{{RedGunHeavy}}{{YellowGun}}||1.2
|-
|{{RedAmmo}}{{RedGunHeavy}}{{Radar}}||1.25
|-
|{{RedAmmo}}{{RedGunHeavy}}{{YellowGun}}{{Radar}}||1.3
|}
|-
|
;Notes
* It is '''inadvisable''' to run any of the other setups beyond the most basic Gun+AP. This is because the other set-ups will interfere with artillery spotting and cost better attack bonuses.
* The bonus only applies against [[FBB]], [[BB]], [[BBV]], [[CV]], [[CVB]], [[CA]], and [[CAV]].
** This includes [[Installation]]s.
** This means that this bonus does not apply against all other types, namely CVL, CL(T), CT, DD, DE, SS(V), AV, AS, AR, LHA, or AP.
<references/>
|}

{|class="wikitable mw-collapsible mw-collapsed" width="100%"
!Shelling Support
|-
|
This formula applies to surface shelling and carrier attacks during shelling support.
{|style="padding:10px; margin:20px; border:1px solid orange; border-radius:10px"
|valign="center"|  <math>\text{Accuracy}_\text{shelling support} = \bigg\lfloor \Big( 64 + 2 \times \sqrt{\text{Level}} + 1.5 \times \sqrt{\text{Luck}} + \sum_{\text{All Equips}} \text{Acc}_\text{equip base} \Big) \times \text{Mod}_\text{vanguard} \times \text{Mod}_\text{formation} \times \text{Mod}_\text{morale} \bigg\rfloor </math>
|}
;With
* <math>\text{Acc}_\text{equip base}</math> does not include any [[Visible Bonus]] nor [[Improvement]].
* <math>\text{Mod}_\text{formation}</math> uses the same Day Shelling [[#Accuracy|formation modifier]] as the sortieing fleet if Single vs Single combat, or '''1.0''' if the player fleet is Combined
** Vanguard uses Top value ('''0.8''') only, vs DD exception also applies
** Player Single vs Enemy Combined is unconfirmed, but suspected to be 1.0 for all formations in line with Damage calculations
|}

{|class="wikitable mw-collapsible mw-collapsed" width="100%"
!Torpedo Attacks
|-
|
This formula only applies to opening and closing torpedo attacks during day battles.
{|style="padding:10px; margin:20px; border:1px solid orange; border-radius:10px"
|valign="center"|  <math>\text{Accuracy}_\text{torpedo} = \bigg\lfloor \left( \text{Acc}_\text{base} + 2 \times \sqrt{\text{Level}} + 1.5 \times \sqrt{\text{Luck}} + \sum_{\text{All Equips}} \text{Acc}_\text{equip} + \left \lfloor{\frac{\text{Attack}_\text{torp}}{5}} \right \rfloor + \text{Mod}_\text{ship} \right) \times \text{Mod}_\text{vanguard} \times \text{Mod}_\text{formation} \times \text{Mod}_\text{morale} \times \text{Mod}_\text{smoke} \bigg\rfloor</math>
|}

;With
* <math>\text{Acc}_\text{base}</math> the base accuracy value of the attack.

{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center; margin:auto"
!colspan=4| Fleet type base accuracy values<ref>https://twitter.com/Divinity_123/status/1470001784009773057</ref>
|-
!rowspan=2 colspan=2|'''<big>vs.</big>'''!!colspan=2|Enemy
|-
| '''Single Fleet'''|| '''Combined Fleet'''
|-
!rowspan=4|Player
| '''Single Fleet'''|| 85|| 50
|-
| '''CTF Escort'''|| 85|| 46
|-
| '''STF Escort'''|| 85|| 46
|-
| '''TCF Escort'''|| 85?|| ?
|-
!rowspan=3|Abyssal
| '''Single Fleet'''|| 85||85
|-
| '''Combined Main'''|| ?|| ?
|-
| '''Combined Escort'''|| ?|| ?
|}

* <math>\text{Attack}_\text{torp}</math> the final basic torpedo attack power of the ship. See ''[[Damage_Calculations#Torpedo_Attacks|here]]'' for more details.
** The figure incorporates any pre-cap and post-cap modifiers and takes into account the attack cap.
** The engagement and damage state play a role in torpedo accuracy.
* <math>\text{Mod}_\text{ship}</math> the innate torpedo accuracy of the ship. Currently, only Abyssal ships have values above '''0''' ([https://twitter.com/Divinity_123/status/1566374937732030465]).
<references/>
|}

{|class="wikitable mw-collapsible mw-collapsed" width="100%"
!Aerial Combat
|-
|
This formula applies to the airstrikes performed during the aerial combat phase and support. Although ASW support functions like an airstrike for damage, it '''does not''' use this formula.
{|style="padding:10px; margin:20px; border:1px solid orange; border-radius:10px"
|valign="center"|  <math>\text{Accuracy}_\text{airstrike} = \text{Acc}_\text{base} + \text{Mod}_\text{skip bombing}</math>
|}

;With
* <math>\text{Acc}_\text{base}</math> the base accuracy value of the attack.
{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center; margin:auto"
!colspan=5| Fleet type base accuracy values<ref>https://twitter.com/Divinity_123/status/1564593191705272322</ref>
|-
!colspan=2|Attacker
!Defender
!Normal Combat
!Air Raid
|-
!rowspan=6|Player
!rowspan=3|Single Fleet
|Abyssal Single||95|| -
|-
|Abyssal Main||115|| -
|-
|Abyssal Escort||80|| -
|-
!rowspan=3|Combined Fleet
|Abyssal Single||95|| -
|-
|Abyssal Main||110|| -
|-
|Abyssal Escort||80|| -
|-
!rowspan=2|Abyssal
!rowspan=2|Single/Combined
|Player Main||110||105<ref name="*">Based on formation 3 only; information lacking on formation 3 evasion modifier to confirm the value.</ref>
|-
|Player Escort||75||70<ref name="*"/>
|}

* <math>\text{Mod}_\text{skip bombing}</math> is a bonus for plane using skip bombing:
{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center; margin:auto"
!colspan=7|<math>\text{Mod}_\text{skip bombing}</math>[https://x.com/Divinity_123/status/1843665369762087318]
|-
!vs DD!!vs CL(T) / AV?!!vs CA(V)!!vs (F)BB(V) / CV(L/B)!!other
|-
|{{Color|green|+13}}||{{Color|green|+17}}||{{Color|green|+22}}||{{Color|green|+30}}||?
|}
|-
|
;Notes
* Airstrike accuracy is a constant and '''not affected''' by any outside factors.
<references/>
|}

{|class="wikitable mw-collapsible mw-collapsed" width="100%"
!Anti-Submarine Warfare
|-
|
This formula applies to all ASW attacks in the combat phase and support.
{|style="padding:10px; margin:20px; border:1px solid orange; border-radius:10px"
|valign="center"|  <math>\text{Accuracy}_\text{ASW} = \bigg\lfloor \left( 80 + 2 \times \sqrt{\text{Level}} + 1.5 \times \sqrt{\text{Luck}} + \sum_{\text{All Equips}} \text{Acc}_\bigstar + 2 \times \sum \text{ASW}_\text{sonar} \right) \times \text{Mod}_\text{vanguard}? \times \text{Mod}_\text{formation} \times \text{Mod}_\text{morale} \times \text{Mod}_\text{synergy} \times \text{Mod}_\text{smoke} \bigg\rfloor</math>
|}

;With
* <math>\text{Acc}_\bigstar</math> the {{Hit}} "ASW accuracy" given from [[Improvement]] ({{Sonar}} [[Sonar]] only)
* <math>\text{ASW}_\text{sonar}</math> the '''base''' ASW stat of any {{Small Sonar}} [[Small Sonar]]s equipped.
** {{Large Sonar}} {{Equipment/Link|Type 0 Passive Sonar|text=Large Sonars|link_category=Large Sonars}} are not counted for this bonus.
** This modifier doesn't apply to the [[New Submarine Princess Flagship III]] <ref>https://twitter.com/Divinity_123/status/1238644817804091392</ref>
* <math>\text{Mod}_\text{synergy}</math> the synergy bonus from equipping certain combinations of ASW equipment.
** Synergy bonus is either currently bugged or so small it cannot be tested.
|-
|
;Notes
* The base {{Hit}} accuracy stat of the equipment is '''not''' included here.
* Equipping more sonars is the best way to boost ASW accuracy.
<references/>
|}

{|class="wikitable mw-collapsible mw-collapsed" width="100%"
!Night Battles
|-
|
This formula applies to '''all''' night battle attacks. 
{|style="padding:10px; margin:20px; border:1px solid orange; border-radius:10px"
|valign="center"|  <math>\text{Accuracy}_\text{NB} = \bigg\lfloor \bigg( \text{Mod}_\text{contact} \times \Big( 69 + \text{Mod}_\text{star shell} \Big) + 2 \times \sqrt{\text{Level}} + 1.5 \times \sqrt{\text{Luck}} + \sum_{\text{All Equips}} \text{Acc}_\text{equip} \bigg) \times \text{Mod}_\text{vanguard} \times \text{Mod}_\text{formation} \times \text{Mod}_\text{morale} \times \text{Mod}_\text{CI} + \text{Mod}_\text{searchlight} + \text{Mod}_\text{fit} \bigg\rfloor</math>
|}

;With
* <math>\text{Mod}_\text{contact}</math> the modifier of the Night contact, its value depends on the {{Hit}} stat of the {{Night Recon}} {{Equipment/Link|Type 98 Reconnaissance Seaplane (Night Recon)|Type 0 Reconnaissance Seaplane Model 11B Kai (Night Recon)|Loire 130M|text=Night Recon|link_category=Night Recon}}.

{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center"
!colspan=2|<math>\text{Mod}_\text{contact}</math>
|-
!{{Hit}}
!Contact mod
|-
|1||1.1
|-
|2||1.15
|-
|3||1.2
|}
* <math>\text{Mod}_\text{star shell}</math> being '''5.0''' if a {{StarShell}} {{EquipmentLink|Star Shell}} or a [[Combat/Night_Battle#"New_Type"_Cut-ins|Night Zuiun CI]] is triggered, '''0''' otherwise.
**The effects of the {{StarShell}} {{EquipmentLink|Star Shell}} and the [[Combat/Night_Battle#"New_Type"_Cut-ins|Night Zuiun CI]] '''do NOT''' stack.
**Effects apply only after the [[Combat/Night_Battle#"New_Type"_Cut-ins|Night Zuiun CI]] triggered.

* <math>\text{Mod}_\text{searchlight}</math> being '''7.0''' if a {{Searchlight}} {{EquipmentLink|Searchlight|Type 96 150cm Searchlight|text=Searchlight|link_category=Searchlight}} is triggered, '''0''' otherwise,
* <math>\text{Mod}_\text{CI}</math> the night battle special attack modifier. See ''[[Night Battle]]'' for more details.
** Multipliers for carrier cut-ins are unknown.

{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center"
!colspan=3|<math>\text{Mod}_\text{CI}</math>
|-
!colspan=3|"New" Cut-ins
|-
!Attack Type
!Prerequisites
!Accuracy<br>Modifier
|-
!style="background-color:#ff7f50; color:black" rowspan=4|Destroyer Cut-ins
|{{TorpedoWeapon}}{{RedGunLight}}{{Surface Radar}}
|1.1
|-
|{{TorpedoWeapon}}{{Surface Radar}}{{SurfaceShipPersonnel}}
|1.2~?
|-
|{{TorpedoWeapon}}{{TorpedoWeapon}}{{Equipment/Card|Torpedo Squadron Skilled Lookouts|size=40px}}
|1.37~?
|-
|{{TorpedoWeapon}}{{Drum}}{{Equipment/Card|Torpedo Squadron Skilled Lookouts|size=40px}}
|?
|-
!style="background-color:#9370db; color:black" rowspan=4|Night Zuiun Cut-ins
|{{RedGunHeavy}}{{RedGunHeavy}}{{Night SPB}}{{Night SPB}}{{Surface Radar}}
|rowspan=4|1.02~1.11
|-
|{{RedGunHeavy}}{{RedGunHeavy}}{{Night SPB}}{{Night SPB}}
|-
|{{RedGunHeavy}}{{RedGunHeavy}}{{Night SPB}}{{Surface Radar}}
|-
|{{RedGunHeavy}}{{RedGunHeavy}}{{Night SPB}}
|-
!colspan=3|"Old" Cut-ins
|-
!Attack Type
!Prerequisites
!Accuracy<br>Modifier
|-
!style="background-color:#ff7f50; color:black"|Gun Cut-in
|nowrap|{{RedGunHeavy}}{{RedGunHeavy}}{{RedGunHeavy}}
|2<ref name="vita">From vita version, may have changed</ref>
|-
!style="background-color:#ff7f50; color:black"|Mixed Gun Cut-in
|{{RedGunHeavy}}{{RedGunHeavy}}{{YellowGun}}
|1.5<ref name="vita"/>
|-
!style="background-color:#59f; color:black" rowspan=2|Submarine Cut-ins
|{{LM Sub Torpedo}} {{SubmarineRadar}}
|rowspan=2|?
|-
|{{LM Sub Torpedo}} {{LM Sub Torpedo}}
|-
!style="background-color:#59f; color:black"|Torpedo Cut-in
|{{TorpedoWeapon}}{{TorpedoWeapon}}
|1.5
|-
!style="background-color:#59f; color:black"|Mixed Torpedo Cut-in
|{{TorpedoWeapon}}{{RedGunHeavy}}
|1.5<ref name="vita"/>
|-
!style="background-color:gold; color:black" rowspan=3|Double Attack
|{{RedGunHeavy}}{{RedGunHeavy}}
|rowspan=3|1.1
|-
|{{RedGunHeavy}}{{YellowGun}}
|-
|{{YellowGun}}{{YellowGun}}
|}
<references/>
|}

==Land-Based Air Squadron==
This formula applies to attacks made by [[Land-Based Air Squadron]]s. The accuracy is calculated '''independently''' per squadron.
{|class="wikitable mw-collapsible mw-collapsed" width="100%"
!LBAS
|-
|{{Color|red|Formula for [[Land-Based_Air_Squadron#Morale|normal moral]] only}}
{|style="padding:10px; margin:20px; border:1px solid orange; border-radius:10px"
|valign="center"| <math>\text{Accuracy}_\text{LBAS} = ( 90 + 7 \times \text{Acc}_\text{equip}) \times \text{Mod}_\text{Boss} + \text{Acc}_\text{Sp}</math>
|}
* <math>\text{Acc}_\text{equip}</math> the accuracy stat of the plane,
* <math>\text{Acc}_\text{Sp}</math> accuracy bonus for some [[Land-Based Air Squadron#LBAS Special Bombers|LBAS Special Bombers]] on some targets,
** Unlike other plane the {{Equipment/Link|B-25}} use special modifier against PT Imp and [[Installation]].
{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center; margin:auto"
!colspan=7|<math>\text{Acc}_\text{Sp}</math>[https://x.com/Divinity_123/status/1843665369762087318]
|-
!Plane!!vs DD!!vs CL(T) / AV?!!vs CA(V)!!vs (F)BB(V) / CV(L/B)!!PT Imp!!Installation
|-
|{{Equipment/Link|Ki-102 B}}||{{Color|red|-7?}}
|colspan=3|?
!rowspan=4 colspan=2| Use ship type
|-
|{{Equipment/Link|Ki-102 B Kai + No.1 Model 1B Guided Missile}}||{{Color|red|-17}}||{{Color|green|+7}}||{{Color|green|+5?}}||{{Color|green|+5?}}
|-
|{{Equipment/Link|Type 4 Heavy Bomber Hiryuu + No.1 Model 1A Guided Missile}}||{{Color|red|-7}}||{{Color|green|+7}}||0||{{Color|green|+7}}
|-
|{{Equipment/Link|Type 4 Heavy Bomber Hiryuu (Skilled) + No.1 Model 1A Guided Missile}}||{{Color|red|-5}}||{{Color|green|+5}}||{{Color|green|+5}}||{{Color|green|+5}}
|-
|{{Equipment/Link|B-25}}||{{Color|green|+13}}||{{Color|green|+17}}||{{Color|green|+22}}||{{Color|green|+30}}||0||{{Color|red|-11?}}
|}

* <math>\text{Mod}_\text{Boss}</math> being a bonus against some Boss and Imp enemy:
{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center; margin:auto"
!colspan=7|<math>\text{Mod}_\text{Boss}</math>[https://x.com/Divinity_123/status/1843665369762087318]
|-
!Boss (ID)!!modifier
|-
|{{Enemy/Link|Battleship Princess|text=BB Hime (1557)}}<br>{{Enemy/Link|Battleship Summer Princess|text= Summer BB Hime (1696-1698)}}<br>{{Enemy/Link|Aircraft Carrier Princess|text=CV Hime (1586)}}
|1.1
|-
|{{Enemy/Link|Artillery Imp|text=Artillery Imp (1665-1667)}}||1.05~1.08
|-
|{{Enemy/Link|Pillbox Imp|text=Pillbox Imp (2178-2179,2196-2197)}}||1.04~1.08
|-
|{{Enemy/Link|Anti-Air Guns Imp|text=Anti-Air Guns Imp (2180-2181)}}||1.12~1.25
|-
|{{Enemy/Link|PT Imp Pack|link=PT Imp Pack|text=PT Imp (1637-1640)}}||0.95<br>(0.85 for {{Equipment/Link|B-25}})
|}
|-
|
;Note
*There are strong evidence that abyssal skip bombers behave the same as the {{Equipment/Link|B-25}}.
*Because the LB moral during waves cannot be knowed this formula is only for normal morale.
|}

;Notes
* For {{Interceptor Fighter}}/{{Interceptor Fighter2}} [[Interceptor]]s, the {{Anti-Bomber}} and {{Interception}} stats are respectively "Anti-Bomber" and "Interception" and not {{Hit}} Accuracy and {{Evasion}} Evasion.

='''Evasion'''=

Evasion has two caps depending on the calculated base evasion of the ship. Base evasion is calculated as follows:

{|class="wikitable mw-collapsible mw-collapsed" width="100%"
!colspan=2|Evasion
|-
!width=20px|<div style=writing-mode:vertical-rl;transform:rotate(180deg); text-align:left;>Pre-cap</div>
|
{|style="padding:10px; margin:20px; border:1px solid orange; border-radius:10px"
|valign="center"|  <math>\text{Evasion}_\text{pre-cap} = \Big\lfloor \left( \text{Evasion}_\text{ship} + \sqrt{2\text{Luck}} \right) \times \text{Mod}_\text{formation} \Big\rfloor</math>
|}

;With
* <math>\text{Evasion}_\text{ship}</math> the displayed evasion {{Evasion}} of the ship, '''including''' any equipment stats and [[Visible Bonus]]es.
* <math>\text{Mod}_\text{formation}</math> the formation modifier. It varies based on the attack being received. Please see [[Combat#Formation Selection|Combat]] for more details.
** Vanguard's modifier is '''1.0''' if assuming values described in [[#Vanguard Formation|Vanguard Formation]]

{|class="wikitable mw-collapsible mw-collapsed"
!colspan=5|<math>\text{Mod}_\text{formation}</math>
|-
!Formation
!Day Shelling &<br>Carrier Attacks
!Torpedo Attacks
!ASW
!Night Battles<ref>https://twitter.com/Divinity_123/status/1680199577989685251</ref>
|-
|Line Ahead||1.0||1.0||1.0||1.0
|-
|Double Line||1.0||1.0||1.0||1.0
|-
|Diamond||1.1||1.1||1.0||1.0
|-
|Echelon||1.4||1.3||1.4||1.3
|-
|Line Abreast||1.3||1.4||1.1||1.2
|-
|Vanguard (Top)||?||?||?||?
|-
|Vanguard (Bottom)||?||?||?||?
|-
!Colspan=5|Exception
|-
|Echelon (vs combined)||1.2||1.3||1.3||1.1
|-
|All formation vs [[LBAS]] [https://x.com/Divinity_123/status/1843665369762087318]
|colspan=4 style="text-align:center"|1.0
|-
!Colspan=5|Combined Fleet
|-
|Combined Fleet Cruising Formation 1||?||?||1.0||?
|-
|Combined Fleet Cruising Formation 2||?||?||?||?
|-
|Combined Fleet Cruising Formation 3||?||?||1.0||1.1
|-
|Combined Fleet Cruising Formation 4||?||?||1.0||1.0
|}
|-
!width=20px|<div style=writing-mode:vertical-rl;transform:rotate(180deg); text-align:left;>Cap</div>
|
The evasion is then capped as follows:
{|class="wikitable" style="text-align:center"
!<math>\text{Evasion}_\text{pre-cap}</math>
!<math>\text{Evasion}_\text{cap}</math>
|-
| ≤ 40|| <math>\text{Evasion}_\text{pre-cap}</math>
|-
| ≥ 40 & ≤ 65|| <math>\lfloor 40 + 3\sqrt{\text{Evasion}_\text{pre-cap} - 40} \rfloor</math>
|-
| ≥ 65|| <math>\lfloor55 + 2\sqrt{\text{Evasion}_\text{pre-cap} - 65}\rfloor</math>
|}
|-
!width=20px|<div style=writing-mode:vertical-rl;transform:rotate(180deg); text-align:left;>Post-cap</div>
|
Capped evasion is then modified by post-cap modifiers:
{|style="padding:10px; margin:20px; border:1px solid orange; border-radius:10px"
|valign="center"|  <math>\text{Evasion}_\text{post-cap} = \Bigg\lfloor \Bigg\lfloor \text{Mod}_\text{searchlight} \times \bigg( \text{Evasion}_\text{cap} + \sum_{\text{Sonar/Engine}} \Big( 1.5 \times \sqrt{\bigstar} \Big) + \text{Mod}_\text{CA} + \text{Mod}_\text{DD} - \text{Mod}_\text{fuel} \bigg) \Bigg\rfloor \times \text{Mod}_\text{LBAS} \Bigg\rfloor</math>
|}

;With
* <math>\text{Mod}_\text{searchlight}</math> a {{Searchlight}} {{EquipmentLink|Searchlight|Type 96 150cm Searchlight|text=Searchlights|link_category=Searchlights}} evasion penalty, being:
**'''0.2''' for any ship equipped with a searchlight in night battle (even if not triggered),
**'''1.0''' otherwise.
* <math>\bigstar</math> the [[improvement]] level of:
**{{Engine}} [[Engine Improvement]]s in all cases,
**{{Sonar}} [[Sonar]]s in opening and closing torpedo attacks only, 
**'''0''' otherwise,
** ''It is +4.7 {{Evasion}} per equipment at {{MaxStar}}.
* <math>\text{Mod}_\text{CA}</math> the [[CA]]/[[CAV]] night battle evasion bonus. It is '''5''' for CA(V) during [[Night Battle]]s and '''0''' otherwise.
* <math>\text{Mod}_\text{DD}</math> the [[DD]] night battle evasion bonus. If the DD is equipped with a {{Surface Radar}} [[Surface Radar]] '''AND''' a {{SurfaceShipPersonnel}} {{EquipmentLink|Skilled Lookouts|Torpedo Squadron Skilled Lookouts|text=Skilled Lookout|link_category=Surface Ship Personnel}}, then it is '''10'''.
* <math>\text{Mod}_\text{fuel}</math> the remaining fuel penalty:
** <math>\text{Mod}_\text{fuel} = 75 - \text{Fuel}</math>
** If fuel is above 75%, the penalty is 0. 
** The penalty is an integer and not a percentage.

{|class="wikitable" style="text-align:center"
|+ Remaining Fuel Penalty
|-
!Battle #<ref>This only takes into account normal day battles. [[Node|Special nodes]] have different resource consumption.</ref>
!Remaining Fuel!!Penalty
|-
|2nd Battle||80%||0
|-
|3rd Battle||60%||15
|-
|4th Battle||40%||35
|-
|5th Battle||20%||55
|-
|6th+ Battle||0%||75
|}
* <math>\text{Mod}_\text{LBAS}</math> is applied when the attacker is a [[LBAS]] and '''1''' otherwise:
{|class="wikitable"
!colspan=2|<math>\text{Mod}_\text{LBAS}</math>[https://x.com/Divinity_123/status/1843665369762087318]
|-
!Fleet!!Modifier
|-
|Single Fleet||0.86
|-
|Combined Fleet||0.68
|-
|CF vs {{Equipment/Link|B-25}}||0.7 (0.68 in event)
|}
<references/>
{{clear}}
|}

;Notes
* Evasion term can be '''negative''' with the fuel penalty.
* The speed of the fleet is supposed to play a role in evasion. Currently, said increase is either nonexistent or too small to test,
* {{SubmarineRadar}} [[Submarine Equipment]] may provide an evasion bonus to submarines against [[ASW]] attacks (around 1.2 [https://discord.com/channels/447766493753507850/1150616313836880042/1243098116341628939]),
* Using {{Supplies}} {{EquipmentLink|Underway Replenishment}} is a way to mitigate fuel penalties,
* Because of the evasion cap, trying to increase evasion above 65 has negligible effects,
* As most ships are capable of reaching 65 {{Evasion}}, trying to increase evasion using pre-cap means has little to no effect, this includes:
** Increasing the {{Evasion}} (e.g. with boilers, if unimproved),
** [[Luckmod]]ding {{Luck}},
** Choosing a weaker formation with an evasion bonus (except for [[Vanguard]]).
* [[Events]] often have "historical evasion bonuses" alongside other historical bonuses, but are not always measured due to their limited-time nature.

='''Special Cases'''=
==Vanguard Formation==
'''This mechanic's effects are still under evaluation, so values are subject to change.

When a fleet is in Vanguard Formation it gives an accuracy malus to the opposite fleet. This malus is determined by 4 factors:
*Ship position in the fleet,
*Ship type,
*Normal or event map,
*Combat phase,
It is the same for the Abyssals.

It is called <math>\text{Mod}_\text{vanguard}</math> in the accuracy formulas above.

{|class="wikitable mw-collapsible mw-collapsed" style="text-align:center"
!colspan=4|<math>\text{Mod}_\text{vanguard}</math><ref>https://twitter.com/Divinity_123/status/1566375780380282882</ref>
|-
!colspan=4|Shelling Phase and Night Battle
|-
|Fleet Position
|Non-DD
|DD (normal map)
|DD (event)
|-
|1
|rowspan=4|0.95
|rowspan=2|0.95
|rowspan=2|0.95
|-
|2
|-
|3
|rowspan=2|0.8
|rowspan=2|0.6
|-
|4
|-
|5||0.86||0.69||0.52
|-
|6||0.8||0.64||0.48
|-
|7||0.7|| -||<0.4
|-
!colspan=4|Torpedo Phase
|-
|1
|rowspan=2|0.9
|rowspan=2|0.9
|rowspan=2|0.9
|-
|2
|-
|3||0.77||0.65||0.55
|-
|4||0.67||0.58||0.475
|-
|5||0.64||0.5||0.4?
|-
|6||0.55||0.42||0.35?
|-
|7||0.51|| -||?
|-
!colspan=4|ASW
|-
|colspan=4|''?
|}
<references/>

==Debuffs==
During [[Events]], some [[Debuffs]] have been measured to give some additional bonuses of Accuracy {{Acc}} and Evasion {{Evasion}}.
*Please, refer to the current [[Event]] page for up to date information.

==Arctic Map Bonuses==
On all "arctic maps", namely all [[World 3]] maps, as well as some [[Event]] maps, the {{ArmorEquipment}} {{Equipment/Link|Arctic Camouflage (+ Arctic Equipment)}} gives:
*3 Armor {{Armor}} (non-stacking),
*Some Evasion {{Evasion}}.

'''''Sources: [https://kancolle.fandom.com/ja/f/p/2795672881332226463/r/3180511782502402644] [https://docs.google.com/spreadsheets/d/1e6U4aLsrbdvkFlxdgT6wuJCmACpuOD3yYN0Om1o24fI/edit#gid=239440540]'''''

==20.3cm Japanese Guns==
'''So far, no hidden evasion bonus has been observed from equipping any gun on any ship.

*This idea comes from a misinterpretation of an ambiguous tweet by the devs [https://twitter.com/kancolle_staff/status/380238803090145280].

==[[PT boat]]s==
{{Anti-PT Imp Setups|uncollapsed=true}}

=See Also=
*[[Stats]]
{{Mechanics}}