How do you calculate from scratch? Crafting.

Weapons

Quality weapons have their minimum and maximum damages increased by the listed percentage. Thus, a weapon that normally does 50-100 damage would that has a "100% increased physical damage" Prefix and a "adds 10-20 physical damage" Prefix, with +20% quality, deals 132-264 damage.
(Base minimum damage50 + Adds physical damage prefix10)*(1 + Percentage increased physical damage prefix100% + Quality20%)=132
(Base maximum damage100 + Adds physical damage prefix20)*(1 + Percentage increased physical damage prefix100% + Quality20%)=264
The quality of weapons may be improved with a Blacksmith's Whetstone


this is the wiki text for weapons. so basically if u have weapon 100% increased physical, which u put in the spread sheet - u can just add 20% to that = 120% and put it in the increased physical bracket in the spreadsheet. (its in the collumns in this formula: (Base maximum damage100 + Adds physical damage prefix20)*(1 + Percentage increased physical damage prefix100% + Quality20%)=264

now i did all the work for u and the last thing u have to figure out is if they already added the 20% quality in the spreadsheet. but doesnt matter if u want to make ur own weapon u just add the 20% as the excel formula should be the same as on wiki.

first time im doing this, and also dont know if the spreadsheet is reliable ;P so if anyone sees mistakes correct em thx

I now know how to calculate it:

The perfect physical (TORNADO) wand.

(16+25)*(1+249%+20%) = 151.29
(49+45)*(1+249%+20%) = 346.86
(151.29+346.86)*(1.30*1.16)/2 = 375.6051 dps/pdps

The best wand to do it with would be an Imbued Wand

(19+25)*(1+249%+20%) = 162.36
(35+45)*(1+249%+20%) = 295.20
(162.36+295.20)*(1.50*1.16)/2 = 398.0772

So an Imbued Wand is the wand that can reach the highest amount of dps/pdps

And this website calculates the damage with quality but doesn't tell you about it, unless you look at the "coding":
https://docs.google.com/spreadsheet/ccc?key=0ApGogsednYO4dDhZOUJNQ182ZGhmTVRNa0hnWUM4TUE&usp=sharing#gid=1

So TIL how to calculate the dps of an imaginary weapon with 20% quality without having to use the Google document. But thanks to you guys

--------------------------------------------------------------------------------------
Quality: 20%
--------------------------------------------------------------------------------------
Prefixes:

25 to 45 - Max base physical damage (Flaring itemlevel 77)
169% phys - Max % physical damage (Tyrannical itemlevel 73)
80% phys / +135 accuracy - Max % physical damage & accuracy (Emperor's itemlevel 73)
--------------------------------------------------------------------------------------
Sufixes:

16% attack speed - Max % attack speed for wands. (of Renown itemlevel 30)
38% crit multiplier - Max critical strike multiplier (of Destruction itemlevel 73)
38% crit chance - Max increased critical hit chance (of Incision itemlevel 73)

--------------------------------------------------------------------------------------

yep looks fine

This post is here by over! I now know how to calculate the dps of a none-existing weapon and adding the 20% quality.

So thank you for reading, thank you for your comments & feedback, and thank you for playing this awesome.

Sincerely,
MortenseNN