Armor Rating Calculation Help

[ScottyDoesKnow]

I'm trying to figure out the correct calculation for heavy armor rating and the information here doesn't seem to work for me:

 

http://www.uesp.net/wiki/Skyrim:Armor#Armor_Rating

 

 

"Armor rating= (base armor rating + item quality) x (1 + 0.4 x (skill + skill effect)/100) x (1 + unison perk† + Matching Set) x (1 + armor perk‡)

† Custom Fit for light armor or Well Fitted for heavy armor

‡ Agile Defender for light armor or Juggernaut for heavy armor"

I'm currently testing on basic Imperial Bracers you get at the start of the game (base AR 10). I have a heavy armor skill of 30 and one point in juggernaut. I'm currently ignoring item quality, but since I haven't improved the bracers it shouldn't matter. The calculations:

AR = (10 + 0) x (1 + 0.4 x (30 + 0) / 100) x (1 + 0 + 0) x (1 + 0.2)

AR = 10 x (1 + 0.4 x 0.3) x 1 x 1.2

AR = 10 x (1 + 0.12) x 1.2

AR = 10 x 1.12 x 1.2

AR = 10 x 1.344

AR = 13.44

Unfortunately, the bracers display an AR of 14. So something is wrong here:

1. The formula is incorrect.

2. I used the formula incorrectly.

3. Unimproved items have an item quality bonus.

Any advice?

Sidenote: if anyone knows of a way to get the item quality, let me know. I'm using the OnEquip/OnUnequip events, which don't always give an ObjectReference.

[kromey]

The formula is only approximate (as UESP mentions), and your calculated result is (once you account for rounding) only six one hundredths off of the displayed rating -- which, when you think about it, is really really close.

 

I doubt you did anything wrong, it's just the formula is only an approximation, combined with the fact that the result in the UI is rounded.

[ScottyDoesKnow]

Well after far too much trial and error, I came up with the following formula for heavy armor, which seems to work pretty well but is somewhat hacky:

 

1. Ancient Knowledge adds 20% instead of 25%

2. Overall fudge factor of 6%

 

juggernautFactor = JuggernautPerkRank * 0.2

ancientKnowledgeFactor = 0.2 if they have it and are wearing dwarven gauntlets (should be 0.25)

wellFittedFactor = 0.25 if they have it and are wearing all heavy armor

matchingSetFactor = 0.25 if they have it and are wearing a matching set of heavy armor

fudgeFactor = 1.06 (straight outta my ass)

 

actual = base

* (1 + juggernautFactor)

* (1 + (0.4 * HeavyArmorSkill / 100) + ancientKnowledgeFactor)

* (1 + wellFittedFactor + matchingSetFactor)

* fudgeFactor

 

Next step is probably calculating how much your character COULD improve the item and adding that factor, since there's no way to see if the item is actually improved.