This thread explains how Diablo 3 calculates a weapon’s

The

The affixes need to be on the weapon to show up in the tooltip damage range. (A +X Maximum Damage affix on a ring will not be included, but it will be included in your paper DPS.) Any fractions in the tooltip damage range are rounded to the nearest integer. As a result, this range is almost always* an approximation if the item has the +X% Damage affix; it is not the weapon’s real damage range.

Each weapon’s

The

The initial calculations in this thread will not cover buffs from class skills such as Blazing Wrath. I will add them at a later date, but I haven’t researched them extensively because I don’t use those skills in my build. They’re straightforward, however, compared to the calculations I will examine in this thread, so I will incorporate them later. I have no plans to examine non-Monk skills because I am only playing a Monk at the moment, but I encourage those who play other classes to take this information and run with it.

**tooltip damage range,**its**tooltip DPS,**and your**character sheet DPS,**which is also known as your “paper DPS.”The

**tooltip damage range**is based on six factors:- The weapon’s base damage range, which is visible on rare weapons before they are identified but unseen afterward if the item has a socketed ruby or any of the affixes listed below
- The
*+X Minimum Damage*affix - The
*+X Maximum Damage*affix - The
*+X% Damage*affix - The
*+X–Y Elemental Damage*affix - Any socketed rubies

The affixes need to be on the weapon to show up in the tooltip damage range. (A +X Maximum Damage affix on a ring will not be included, but it will be included in your paper DPS.) Any fractions in the tooltip damage range are rounded to the nearest integer. As a result, this range is almost always* an approximation if the item has the +X% Damage affix; it is not the weapon’s real damage range.

Each weapon’s

**tooltip DPS**is based on two factors:- The weapon’s average damage per hit, which is based on the weapon’s real damage range and almost always* differs from the tooltip damage range if the item has the +X% Damage affix
- The weapon’s attack speed, which is based on the following factors:
- The weapon’s base attack speed, which is visible on rare weapons before they are identified but unseen afterward if the item has has either or both of the affixes listed below
- The
*+X Attack Speed*affix - The
*Increases Attack Speed by X%*affix

The

**character sheet DPS**is based on these factors and many more, namely:- The
*+X Attack Speed*affix on either weapon, which applies to both weapons when determining the character sheet DPS calculation but does not appear in the weapon tooltip of any weapon that doesn’t have the affix - The Enchantress’s
*Focused Mind*skill - Numerous character skills, such as the Monk skill
*Breath of Heaven: Blazing Wrath* - All
*+X Minimum Damage, +X Maximum Damage,*and*+X–Y Damage*affixes on armor - The
*Adds X% to Elemental Damage*affix on weapons, which applies to the weapon’s non-elemental damage and all +Damage affixes on armor - All
*Increases Attack Speed by X%*affixes on armor - The 15% attack speed bonus for wielding two weapons (a.k.a. dual-wielding)
- Your character’s Dexterity score
- Your character’s total Critical Hit Chance percentage, which is compiled from all weapons and armor and displayed in the Details screen of your character sheet
- Your character’s total Critical Hit Damage percentage, which is compiled and displayed like the Critical Hit Chance score

The initial calculations in this thread will not cover buffs from class skills such as Blazing Wrath. I will add them at a later date, but I haven’t researched them extensively because I don’t use those skills in my build. They’re straightforward, however, compared to the calculations I will examine in this thread, so I will incorporate them later. I have no plans to examine non-Monk skills because I am only playing a Monk at the moment, but I encourage those who play other classes to take this information and run with it.

**WARNING: HERE THERE BE MATH.**This thread is going to be very long and filled with examples and step-by-step calculations. If you’re looking for a TL;DR version, I can’t help you. My goal is to help players understand these mechanics so they can design better spreadsheets and calculators and make more informed AH purchases. I can’t accomplish these goals in a TL;DR format, but I’m going to break the steps into separate posts so people can digest it in chunks.** I say “almost always” because an item with a particular range might not produce any fractions when combined with a particular +X% Damage figure. For example, if an item’s base damage range is 225–375, the +8% Damage affix will increase range to exactly 243–405.*