How much does critical damage do?

When you deal critical damage, is it twice the normal damage? Is the multiplier less than x2?

If you have a guess let me know - if you believe you are 100% correct, make it known.

Thanks.

Crits do 1.5x damage.

I ran a quick sample against Lvl 16 Blowfly Swarms, North of Drybone, as a Lvl 36 Monk
(This just happened to be where I was and what was nearest to me)

Here is the information collected:

Normal Attack: 36-39 dmg (based on 46 results)
Normal Attack Criticals: 54-59 (based on 48 results)
Bootshine (130 Potency): 61-68 (based on 21 results)
Bootshine Normal Criticals: 92-101 (based on 27 results)
Bootshine Opo-Opo Form Criticals: 97-126 (based on 20 results)

Aid -
Bootshine: "Delivers an attack with a potency of 130"
*Opo-Opo Form Bonus: Critical damage if dealt from behind target"

Clarification:
Bootshine Normal Criticals are defined as the critical damage dealt by Bootshine when not in Opo-Opo form, thus not receiving the form bonus. Bootshine Opo-Opo form criticals are the effect of critical damage dealt when Bootshine was used in Opo-Opo form.

Here are the statistics based on my small sample, pertaining to critical percentage. (Note: 1 = 100%, 1.5 = 150%, etc.)
(Aid: Move the decimal 2 places to the right to find percentage)

"> = In comparison with", "N. = Normal", "Boot = Bootshine", "Opo = Opo-Opo Form"

N. Atk > N Atk. Crit = 1.5-1.5128x
N. Atk > Bootshine = 1.6944-1.7435x
N. Atk > Boot Crit = 2.5555-2.5897x
N. Atk > Boot Opo Crit = 2.6944-3.2307x
---
N. Atk Crit > Bootshine = 1.1296-1.1525x
N. Atk Crit > Boot Crit = 1.7037-1.7118x
N. Atk Crit > Boot Opo Crit = 1.7969-2.1355x
---
Bootshine > Boot Crit = 1.4852-1.5081x
Bootshine > Boot Opo Crit = 1.5901-1.8529x
---
Boot Crit > Boot Opo Crit = 1.0543-1.2475x

These percentages are not posted to represent the exact percentage in the FFXIV: ARR Battle System - these are just the percentages found using my small sample. This is not meant to determine the exact percentages, only to provide the facts of based on the information I collected.

If you notice any errors please mention it, or message me to correct it. Please make sure it really is an error, though.

Here is more help in understanding Critical Damage - as well as a myriad of other helpful in-game formulas and statistics. http://valk.dancing-mad.com/?page_id...amageMechanics

Normal Attack: 36-39 dmg (based on 46 results)
Normal Attack Criticals: 54-59 (based on 48 results)
36 * 1.5 = 54
39 * 1.5 = 58.5 ... ~59

Bootshine (130 Potency): 61-68 (based on 21 results)
Bootshine Normal Criticals: 92-101 (based on 27 results)
61 * 1.5 = 91.5 ... ~92
68 * 1.5 = 102

Bootshine Opo-Opo Form Criticals: 97-126 (based on 20 results)
61 * 1.07 (greased lightning bonus) = 65.27 * 1.5 = 97.9 ... ~98
68 * 1.07 = 72.76 * 1.5 = 109.14 ... ~109
68 * 1.07 * 1.1 (twin snakes bonus) * 1.5 = ~120


Basically, don't forget bonuses from other skills in your calculations. The only significant difference is in the max Bootshine Opo-Opo crit that you got, but I'm guessing you just got lucky with a nice base damage (about a 71 normal bootshine), or you had some other buff as well.

End result: The crit multiplier is 1.5.