Haste: In Depth by Kirschy

From FFXI Wiki
This article is a guide.
Guides are works of opinion.
This is not a community collaborative guide. Any editing should only be done to increase legibility or formatting (such as typos); the opinions therein should not be changed.
If significant changes are required, please contact the guide author on their personal talk page or via the the "Discussion" tab.
Please do not edit this page unless you have been given permission to do so by the guide's primary author/creator.
Should you wish to contribute to this guide; please contact the current guide author on their personal talk page or the "Discussion" tab.

I started out by assuming Haste works in terms of x/256. I was quick to find out the math doesn't pan out on certian calculations. I changed my system to assume Haste works in terms of x/512, and had about 6hrs of data/calculations where the math all works out.

The rest of this post assumes x/512 is the correct way to represent haste values.


All Haste equipment follows a particular pattern:

  • 1% (Blitz Ring) = 5/512
  • 2% (Quick Belt/Dusk Feet) = 10/512
  • 3% (Homam Hands/Feet, Dusk Hands, etc..) = 15/512
  • 4% (Ace's Helm) = 20/512
  • 5% (Turban) = 25/512
  • 6% (Speed Belt) = 30/512

It seems pretty easy to pick up the pattern. All haste equipment can be added together.
Example, using Ace's Helm + Dusk feet... (10/512 + 20/512 = 30/512 = 6%.)


Equipment Haste Cap is 128/512. (25%) [This has been known.]

  • Interesting Note: If you have 25% haste in equipment, your Haste is actually 125/512. This means you need more than 25% haste in equipment to hit the Equipment Cap.
  • Interesting Note 2: Rune Chopper is 9% Haste, but doesn't check out to be 45/512. In fact it's 47/512. I checked out a variety of equipment, but this is the only piece which seems to have that unique trait.


Haste (Spell) is 75/512. (Roughly 14.65% Haste.) [This has been known.]

  • Magic Haste + Eq Haste adds together. Example: Haste + Turban + Dusk Hands + Dusk Feet. ( 75/512 + 25/512 + 15/512 + 10/512 = 125/512 = 25% Haste )
  • Assuming that a 75 BRD with March + 2 Instrument and capped Wind/Singing skill is capped on March songs. The follow is the haste for each~
  • March 1 = 48/512 (9.375%) [This has been known.]
  • March 2 = 56/512 (10.9375%) [This has been known.]
  • March x2 = 104/512 (20.3125%) [This has been known.]


Both are have numerators that are multiples of 4. I'm hoping I can try some tests later to see how wind/sing skill and instruments affect the marches and where the cap is.

  • The haste cap from Magic/Songs is 224/512. (43.75%) [Known]
  • Recast on spells is capped at 256/512 (50%) from Eq + Magic. [Known]


Fast Cast affects spell recast ontop of the recast cap from Eq/Magic.
I'm currently unable to determine a fastcast cap. (I have an idea to test it sometime.)

  • Homam Legs recast from Fast Cast is: 8/512 (1.5625) [Known]
  • Loq Earring recast from Fast Cast is: 5/512 (.977%) [Known]


Spells have a max recast of 255 seconds.

  • With all of this nailed down I went back to my older tests involving Hasso.
  • Plugging in more precise values for haste makes everything work out much nicer. It can be deduced (with a small margin of error), that Hasso is 50/512 attack speed increase.
  • 104/512 (Marches) + 100/512 (20% Eq) + 75/512 (Haste) + 50/512 (Hasso) = 329/512.
  • 999 * (1 - 329/512) = 357.065 Delay

My results showed a 355.3 Delay
Since the above test showed great accuracy (less than 30 milliseconds off), I feel confidant in applying the following rates to Hasso and Desperate Blows.

  • Hasso attack speed increase is 50/512~
  • Desperate Blows attack speed increase is 25/512, and 25/512 for each additional merit~

Related Links

Retrieved from "https://www.bg-wiki.com/index.php?title=Haste:_In_Depth_by_Kirschy&oldid=698446"