I'll put attack speed in perspective.
Let's say you deal 100 dmg per attack, and have 1.0 BAT.
Therefore, every second, you are dealing 100dps.
The formula for how long you have to wait to attack again is Seconds Per Attack = (iAS+1.00)/BAT, in this case that's SPA=1.0/1.0 or 1 attack per second.
Seconds Per Attack = (increased Attack Speed + 1.00)/BAT base attack time
SPA = (iAS+1)/1
SPA = (0+1)/1
SPA = 1
>> 0% as = 1aps
Let's increase that. 50% as, SPA=(.50+1.0)/1 or 1.5, so 50% as = 1.5aps
Now for more:
0% as = 1.0 aps
100% as = 2.0 aps
200% as = 3.0 aps
300% as = 4.0 aps
400% as = 5.0 aps
500% as = 5.0 aps (capped at 400% as so having more does nothing)
If you have 1.7 BAT, then with 0% as you will attack every 1.70 seconds. At 100% as, every .850 seconds. At 200% as, every .5666 seconds. At 300%, every .4250 seconds. At 400% and higher, every .3400 seconds.
Keep in mind though- it's less about how many seconds it takes to attack or how quickly you attack, and more about how much DPS the attack speed is granting you.
Originally Posted by Drakthul
How fast is BAT if we have 400 AS?
Your BAT is constant. What changes is your APS (attacks per second) or SPA (seconds per attack), based on your attack speed, and BAT.