Dota-Allstars Attack Speed Guide - Dota Allstars Blog

Dota-Allstars Attack Speed Guide

Dota-Allstars Attack Speed Guide will be posted here. This guide is made by Malle from www.dota-allstars.com , all the credit belong to him.

( 1 + IAS ) / BAT = Attacks Per Game Second

BAT / ( 1 + IAS ) = Game Seconds Per Attack

BAT is Base Attack Time:
The time in seconds between attacks without any increased attack speed

IAS is Increased Attack Speed:
How much faster you attack (100% IAS = 1.00 IAS)

Each point of agility gives you 0.01 (or 1%) IAS.

IAS stacks additively
Gloves of Haste (15% IAS) and Hyperstone (55% IAS) will give you a total of 0.7 (55%+15%=70%) IAS.

Negative values (from something that slows you) is just removed from your IAS
Take the above example of 0.7 (70%) IAS but you get slowed by Untouchable lvl 3 for -0.90 (-90%) IAS, you end up at -0.2 (-20%) IAS.

The final IAS affecting your attack can range from -0.8 to 4. Anything less than -0.8 will act as -0.8, and anything more than 4 will act as 4.

Maximum attack speed is thus:
5 / BAT = Attacks Per Game Second
BAT / 5 = Game Seconds Per Attack

And minimum attack speed is thus:
0.2 / BAT = Attack Per Game Second
BAT / 0.2 = Game Second Per Attack


To see which is more effective to get, IAS or damage, you can use the following formula:

X = Y * ( 1 + IAS ) / DPA
Y = ( X * DPA ) / ( 1 + IAS )

DPA = Damage Point Average (the average damage per attack)
IAS = Increased Attack Speed
X = amount of IAS needed to equal Y damage
Y = amount of damage needed to equal X IAS

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6 Comment:

Anonymous said...

well its a little complicated. but 1 question: can you explain me the starting attack speed how mucch should it be and how does it improve per level? email khalil_younes_94@hotmail.com

alief said...

Each heroes have their own starting/base attack speed, just like base HP or attack. How does it improve per level? It improve along with your agility increase, that's why Tiny which have little agility increase has a poor IAS.

Anonymous said...

how do you see what your current attack speed is in the game?? is there a command?

Anonymous said...

study physics lolz!
i see the fastest attack speed in dota is RAZOR freenzy, bfly and +agi per lvl.

Kati ng Kaso-kasuan e jacol na yan!

Anonymous said...

to see your current attack speed u can type -apm.However that is in minutes so u have to divide the value by 60(I think)

Alief said...

@above - "-apm" is not checking your attack speed, but stand for "action per minute". So if you idle for a minute, you apm will be zero :)

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