Here We will introduce the Hero online Def and Sdef in maths.I take it from the other forum,and hopelly helpful to you.

Here are the terms:
1)NakedDef = Def without any gears (comes from char level, dex, passive skills, and stat bonuses)*
NakedSDef = Sdef without any gears (comes from char level, dex, int, passive skills, and stat bonuses)*

2)Upper Defense = total upper defense from mask & helm
Middle Defense = total middle defense from armor
Lower Defense = total lower defense from armor & boots
ArmorBaseDef = (Upper + Middle + Lower) / 3

3)PureDef = (yellow Def stats from Gear) + (set bonuses**)
Def Percent = (yellow Def percent stats from Gear) + (set bonuses**) + (Statue)***
Pure SDef = (yellow Sdef stats from Gear) + (set bonuses**)
SDef Percent = (yellow Sdef percent stats from Gear) + (set bonuses**) + (Statue)***

4)Armors = mask, helm, armor, boots
Jewelry = earring, amulet, ring, bracelet
HT = HT mask, helm, armor, boots
Gears = Armors, Jewelry & HT.
Stat Bonuses: Fruit of Flame Flower, RDP, Wine, MD
Skill Bonus: Buffs and Debuffs

The added dex and int on certain HT has no exact place to fit into this equation. You can factor it in by estimating how much greater your NakedDef and NakedSdef would be. Or,if that piece of HT adds no PureDef, Def Percent, PureSdef, or Sdef Percent, you can find hero online gold out exactly by simply equipping it.Though the data of a set bonus appears on all theitems in the set, the bonus itself is just what it says on a single item.

Convert to decimal by dividing by 100 ex: 50 percent = 0.50
Defense Formula:
((NakedDef + ArmorBaseDef + PureDef) x (1 + Def Percent)) + Def related Skill Bonus
Skill Defense Formula:
((NakedSdef + PureSdef) x (1 + Sdef Percent)) + Sdef related Skill Bonus

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