Talk:Precision

when i add +10 precision from air magic, it seems to give +4% to critical chance. thought it might be useful to know --85.210.37.239 19:06, 29 April 2012 (UTC)

Can heal spells critically heal? If so does this stat effect that? Xanthian 17:17, 30 April 2012 (UTC)

I should have made note of the precision stats and critical hit rate. Ball-park figure: a level 25 player kitting out for max precision can get their critical hits in the 30-40% range. Torrenal 04:20, 6 May 2012 (UTC)

I can't confirm it, but I doubt that heals would be able to critically heal. Mainly because heals have their own secondary attribute that is designed to improve them, and that precision is employed as an offensive attribute. --Xu Davella 08:36, 16 May 2012 (UTC)

Can anyone else prove or disprove the ability of precision to affect heal crits? I've been trying myself to test it, but so far I see it going both ways. Sometimes it seems like they are getting crits, other times not. Nay the One and Only 05:32, 14 September 2012 (UTC)

Crit Rate formula

http://www.guildwars2guru.com/topic/37607-attack-vs-precision/page__view__findpost__p__1464490

Can someone give us a more simplified formula?, i'm not interested in all the calculations, all i want is to know how much crit percentage 1 point of precision gives, this question has been in my mind ever since bwe1. --Rapid Sausage 23:19, 19 August 2012 (UTC)

I did some testing and data gathering on my own and arrived at the formula I just posted on the page (r-squared value of 0.9997 with 10 relatively evenly spaced points between lvl 1 and 80). It is: 0.0025 * Level^2 + 0.05 * Level + 1 Note this is for finding the necessary "additional" precision to increase crit by 1%. This is because precision naturally scales with level and with no modifiers (no gear, no bonuses), the base precision results in a crit chance of 4% at every level. So in simpler words, the formula can tell you how much precision you need to move from 4% to 5% (or 39% to 40%, etc etc). MoonBunnie 09:38, 4 September 2012 (UTC)

Bunnie, what a coincidence seeing that formula up there today. I just came by to post my regression based on (limited) data I collected over the weekend. I ended up with X = 0.0024Clvl^2 + 0.06Clvl + 1 and an R squared of 0.9999. I was calculating it in the greater context of Critical_Chance=Round((Delta_Precision/X)+4) where Delta_Precision is simply your precision bonus (since, at any given level, your base precision is always 4%) I'm curious how your data fits that quadratic vs. the one you originally posted.Thevenin 22:09, 4 September 2012 (UTC)

I think we're calculating the same thing essentially, my explanation was just poor :( And I think the difference is that I assumed the rounding on the char screen was error and that the game calculated crit rate beyond the whole number displayed there. However, this is just a personal assumption, it may well be that the game does round in some fashion when actually performing crit calculations. Given that, your formula may better represent what is shown in-game, so if you feel this is the case, by all means put your's up! :) MoonBunnie 09:39, 8 September 2012 (UTC)

I checked the 0.0025 * Level^2 + 0.05 * Level + 1 formula. I tested it on my 31 level Asura with 138 Additional Precision. According to the formula the required precision number was supposed to be 4.9525. I did some math: 138 / 4.9525 = 27.8647147905. The common sense told me to round this number down and it matched, cause my char had 31% crit chance (27% from formula and 4% from base). But then I altered my EQ so my Asura had 100 Additional Precision this time. This is what I got: 100 / 4.9525 = 20.191822312. So, my overall crit chance should have been 24%, right? Unfortunately, no. When I looked up my char, it was 23%. Where did that 1% go, then? I asked myself this question a lot, because there obviously was something wrong with the formula, and I found Thevenin's formula. So I gave it a try. My required precision number was 5.1664 this time. Quite a change. So: 100 / 5.1664 = 19.3558377207. Ok, so now it matched with my char. But what about the previous Additional Precision? Here is what I got: 138 / 5.1664 = 26.7110560545. Now here on the other hand my char was supposed to have 30%, but it had 31%. So this formula was wrong too. Or was it? Actually, it's 100% correct if you assume that in-game critical chance calculator not only rounds down the numbers, but also rounds them up. If we would round up the 26.7110560545 number, we would have 27%, plus 4% which is 31%, exactly the same as my char's crit chance. Now it's correct. I checked this formula with a lot of different Additional Precision numbers and my theory about crit chance also rounding up seemed to be correct. What I noticed, though, is that the in-game calculator must be dumbing down the numbers before rounding them up or down (for example the 20.54793390 number will be dumbed down to just 20.5) because numbers like 25.54897778 would be rounded down instead of up. All this what I wrote here, is just a theory though, because I checked numbers with only one, 31 level character, but I believe it's correct. grim1234 17:12, 8 September 2012 (UTC)

Naked Precision Stat

As with other stats there's other than zero listed when you're naked for Precision. It's 916 for me as a level 80 Norn Thief. However this is totally ignored in working out actual crit chance, unless somehow it accounts for the 4% base crit chance at level 80. i.e. I see 916 Precision naked, get another 465 from equipped items and end up with 465 / 21 + 4 = 26% crit chance showing on the character sheet. Ath 20:15, 15 September 2012 (UTC)

I was just testing this myself. Level 80 Human Elementalist. No gear on and traits reset. 916 precision but only 4% critical chance. So I guess the base precision doesn't follow the same rule as the added precision (for every 20ish points I add, it does rise 1% chance). Also, the 3% from my Major Sigil of Accuracy doesn't show in the Critical Chance. BioMasterZap 18:25, 10 October 2012 (UTC)

Stats like damage or critical chance gained from upgrade components are not shown in the stats. AFAIK, 916 Precision is "required" to reach the base critical chance of 4%, and from there on you need that 21.16 Precision to increase your crit chance by 1%. Mediggo 18:39, 10 October 2012 (UTC)

Scaling

There has to be a better way that they could do the scaling for this. I had a huge crit rate around level 35 that has only dropped and dropped as I leveled despite getting more gear with higher crit rate and precision mods. It's frustrating to get weaker from leveling up. talk 18:12, 24 September 2012 (UTC)

I don't think it's scaling issues, I think they have some general bug issues with it. Because mine did too. Was 60 some % when my level was in the 40s. Now at 69 it's 40%.. And my precision is my highest stat.. 24.21.210.65 03:32, 25 October 2012 (UTC)

Wasted Precision?

"At 80, the base precision you have is 916, with a crit chance of 4%. At 927 precision, it goes up to 5% crit chance. So to identify if you have any wasted precision, subtract 822 from your total precision, and then check if the end number is divisible by 21." Is there any evidence that the tooltip for Crit Chance is the same as the actual tooltip, and they did not just round down?

Meaning, if I have 921 precision, are we sure the actual crit chance is not 4.5%, while the tooltip dispays 4%? Are there actual wasted points between a single percentage?--sgnl 22:53, 29 November 2012 (UTC)

What about pets?

Hello, does anybody know how pet's critical chance is calculated? Because it seems like it's no the same way as players: i have a feline with 2511 precision(6 points in BM +spotter). A lv80 player with 2511 precision has (2511-822)/21 critical hit chance= 80,4%. With fury it should be 100% crit. Howether my pet does not crit all the time, it seems closer to 80% crit with fury. I tested this against lv80 dolyaks and i checked that my pet was in spotter's range.

Real formula

I saved the displayed critical chance for a given precision here. Based on the amount of Precision required to increase Critical Chance by 1% (that I called S_lvl), I can say that the formula they use is:

Crit chance_disp = trunc(

Preci_lvl - Base_Preci_lvl + 4*S_lvl / S_lvl

, 2 )

First thing to note when you look at my records, a display bug, they never show any 0 after the decimal point.
Second thing, some numbers have a difference of 0.01. I believe they use float instead of double. Raljeor (talk) 05:10, 18 May 2015 (UTC)

crit chance is now outright inciments of 21, marader ammy in pvp is 1050 and character sheet is exactly 54% crit chance. 50.245.236.33 09:09, 29 June 2015 (UTC)

It was always the case. Precision is an integer. Raljeor (talk) 07:29, 6 July 2015 (UTC)

They must use an algorithm similar to:

string dispCritChance(float critChance) {
  stringstream ss;
  ss << (int)critChance << ".";
  int tenth = (int)(critChance*10) % 10;
  if(tenth != 0) ss << tenth;
  ss << (int)(critChance*100) % 10;
  return ss.str();
}

where critChance is (Preci_lvl - Base_Preci_lvl + 4*S_lvl)/S_lvl. Raljeor (talk) 07:57, 6 July 2015 (UTC)

Basic crit chance

Burnt myself on this yesterday - the listed critical chance at lvl 80 no armor/traits is not 5, it's 4. Using the given equation on this page confirmed this, so figure it's just a typo.--85.218.175.253 18:54, 16 October 2017 (UTC)

The article specifically says that the base crit chance in the hero panel is 4.0%, but actual chance is 5.0%. (Methodology was to find the lowest amount of precision required to always crit, and then sit there on the golem for an hour or so with a few of us testing it at the same time.) -Towelcat (talk) 08:20, 17 October 2017 (UTC)

So that would mean that if you're aiming for a 100% crit rate according to the Hero Panel/this article, you need only go as high as 99%? --Messenger (talk) 05:36, 12 December 2017 (UTC)

Yes, you only need to have the hero panel display 99% in order to guarantee a 100% crit rate (against level 80 or lower targets). -Towelcat (talk) 03:13, 13 December 2017 (UTC)

I now can't help but wonder 1) why there's an error in the hero panel, 2) if ANet is going to fix this, and 3) what the fix will be (Have the hero panel display a 5% base or revert calculations to a 4% base). --180.190.35.179 16:16, 12 December 2017 (UTC)

1) Spaghetti code most likely. 2) We've reported it multiple times over the years, so I doubt it. 3) See #2. But they would probably just set it to display with 5% base. -Towelcat (talk) 03:13, 13 December 2017 (UTC)

Max Precision

Full Exotics = 419
6 precision upgrades 120
6 +5 precision infusion 30
item 200
food 150
sigil with max stacks 250
runes 300
assuming 916 base at level 80
450 trinkets
120 trinket upgrades

2821 not including traits

Is it even possible to get 2995 Precision? If so what would it take, and would you have 100% crit chance with it? —The preceding unsigned comment was added by 98.211.40.38 (talk) at 15:57, 12 July 2022‎ (UTC).

Yes easily possible.

Not sure why you think the exotic gear only gives 419 (which would be the case for armor only) - with the bonuses from trinkets and weapons, if you went for assassin stats with all exotic gear, you could get 1139 (or 1381 in ascended gear).

Anyway let's look at ascended since it'll allow us to use infusions too.

Full Ascended Assassin's

Attribute	Value
Power	961
Precision	1381
Toughness	0
Vitality	0
Concentration	0
Condition Damage	0
Expertise	0
Ferocity	961
Healing Power	0

1000 (Primary attribute rank at level 80) + 1381 (Gear: armor+weapons+trinkets) + 175 (Runes: 6x Superior Rune of the Eagle) + 90 (Infusions: 18x Precise 7 Agony Infusion) + 250 (Sigil: 25 stacks of Superior Sigil of Perception) + 150 (food: Bowl of Sawgill Mushroom Risotto) + 200 (utility: Thesis on Masterful Accuracy) = 3246. If I was in WvW I could go get another +260 by capping all three borderland ruins for Superior Bloodlust, and standing in a claimed Keep. This is before traits and skills ... which I could further push my attributes by having an active Signet of Fury effect (+360). This is a bit of an academic exercise though as this is way past 2995.

As the article says however; if you have Fury then you only need to have +70% critical chance from your equipment; and realistically you won't be using precision utility buff or infusions. 70% is equivalent to an extra 1470 precision points at level 80.

A normal ascended gear player with a power build would have +961 from Berserker stats (509 left to find), +100 is the max reasonable benefit from food (409 left to find). A superior sigil of accuracy +7% is equivalent to 147 points (262 left to find). Most builds have easy access to a +5% critical chance trait - equivalent to 105 pts (157 pts left - this is when you'd start swapping berserker equipment for assassins's to make up the difference).

Or with Marauder gear: 1173 (gear) + 100 (food) + 147 (accuracy) + 105 (trait) = 1525 (this is more than 1470 so you'd have overcapped precision and could swap out a few pieces of gear back to berserker). -Chieftain Alex 16:36, 12 July 2022 (UTC)

Fwiw my warrior runs 1 Assassin Ring, 1 Assassin Back item, rest Berserker. Precision food, no traits, plus Sigil of Fury (ends up with 100.1% critical chance). -Chieftain Alex 17:13, 12 July 2022 (UTC)

Here's some excel maths. -Chieftain Alex 17:20, 12 July 2022 (UTC)

Feedback 2024/02/14

removal of the rune section and just pointing to the rune section isnt helpfull the on page rune section used to let your sort the runes by how much preciesion they gave somthing you cannot do on the rune page. --193.3.34.25 16:00, 14 February 2024 (UTC)

I've reviewed the history of this page. This page never had that feature. -Chieftain Alex 20:56, 14 February 2024 (UTC)

Generating an automatic list of totals is generally awkward due to how the bonuses are currently written on the wiki. If we made them easier to automatically sum up, I'm not sure how useful it would be vs how much it would complicate updating the documentation.

I've taken a look at the rune pages - they would be much easier to use a helper template to annotate the values + totalize the rune attributes/percentages post relic update (I last looked at doing this before relics were a thing!). -Chieftain Alex 21:02, 14 February 2024 (UTC)