Critical Chance

Critical Chance is the probability of scoring a Critical Hit on a target.
The chance to hit a target at all is called Hit Chance.

Calculating Critical Chance

• Basic critical chance equals your Luck.
• Add 10% if you take Finesse
• Add 5% for More Critical
• Add 10% for Even More Criticals
• Add up to 60% for Aimed Attacks (depends on aimed body part and Luck)
• Add up to 5% from crafted weapon

It is possible to build a character whose critical chance would be 95% with an aimed attack. Such characters are usually supposed to be "cripplers".

Related Perks and Traits

• More Critical +5%
• Even More Criticals +10%
• Close Combat Master +15%
• Silent Death 100% chance to score a critical hit if sneaked and attacked from behind
• Sharpshooter deducts 50% from critical modifiers of any helmet that is worn by the person you are currently attacking
• Bonehead -10 penalty on the attacker's critical hit roll whenever the head or eyes of a player who has the trait are targeted
• Finesse +10% to Critical Chance, but +30% to your target's DR
• Man of Steel +10 critical resistance

Note: The related perk Better Criticals only affects how a successful critical would hit on the target (gives you a better chance of crippling, knocking down, etc...), but it doesn't affect your critical chance.

Player Notes from the Forum on November 22, 2016, 10:48:44 PM

"If for example I have 15 crit chance and enemy target is wearing an armor with -10 critical chance mod like combat armor. Does it means that I ll have 5 percent chance to crit on him ? Like the critical chance modifier just substract from your final critical chance ( after adding your perks, luck,aiming part, weapon bonus blabla)." -NarrowMinded "Yes its substracting so 15 base crit chance - 10 crit mod = 5% to crit + other bonuses" -Seki "If yes, what is happening with a guy that have 6 critical chance and burst another guy in combat armor that have -10 critical modifier. Does it means that this time the guy bursting will NEVER be able to crit on him because his crit chance was reduced to 0 percent? So to be able to actually have a chance to crit on someone you would need to have higher critical chance than his -critical chance modifier?" -NarrowMinded "No, you can still crit because of hidden crit chance bonus about which you can read in quote below..." -Seki "Interestingly, everyone receives another "hidden" bonus chance to crit based on the results of their to-hit roll; a random number between 1 and 100 is subtracted from your to-hit value (your total hit chance after the formula on the wiki, clamped between 5 and 95). The difference between the random roll result and your to-hit is integer-divided by 10 then added to your critical chance. This means that a character with 1% chance to crit normally would in practice have anywhere between a 1% and 10% chance to cause a critical hit." -Mars Sultan on September 29, 2013, 10:08:16 PM

Note: formula for critical chance from S2 combat.fos:
chance = cr.Stat[ST_CRITICAL_CHANCE] + margin / 10 + (GetHitAim(aim) * (60 + 4 * cr.Stat[ST_LUCK])) / 100

• cr.Stat[ST_CRITICAL_CHANCE] is the crit chance you see in your character info (press "c").
• margin is the "hidden" bonus chance to crit mentioned in the Player Notes above.
• GetHitAim(aim) handles the bonus for where you aim at.
• Critical chance Modifiers from Weapons, Armors and Close Combat Master are applied afterwards.
  

Related: Hit Chance