Attack Speed Guide

IAS·SIAS·EIAS·FPA relationships, wereform·dual wield·rollback skills — calculate every attack speed factor yourself.

Key Concepts

Formula Flow

IAS

Gear

→

IEIAS

Convert

SIAS

Skill buff

−

WSM

Weapon

skillFactor

Skill adj.

→

EIAS

Final

→

increment

Increment

→

FPA

Frames

Try it yourself

Class

Skill / Attack Type

Weapon Type

WSM (Main)

Gear IAS (total): 0

Step-by-Step Calculation

IEIAS = ⌊120 × 0 / (120 + 0)⌋= 0

No gear IAS

EIAS = clamp(0 + 0 − (0) + 0, −85, 75)= 0

increment = ⌊256 × (100 + 0) / 100⌋= 256

animCode=A1, baseFpa=15, weaponClass=1HS

FPA = ⌈(15 − 0) × 256 / 256⌉ − 1= 14f

= 1.79/s (560ms)

14f

FPA

1.79

Attacks/s

EIAS

Next BP:IAS +9+ → 13f (1.92/s)Need +9 more

Attack Timeline

Yellow cell = hit frame. Press play to see the timing.

Current (IAS 0, EIAS 0)14f = 1.79/s (560ms)

Wait

Active

Hit frame(s): 7

Breakpoint Table

Yellow row = current tier — IAS in this range doesn't change FPA.

Min IAS	IEIAS	FPA	Atk/s
+0% ◀	0	14f	1.79/s
+9%	8	13f	1.92/s
+19%	16	12f	2.08/s
+32%	25	11f	2.27/s
+54%	37	10f	2.5/s
+86%	50	9f	2.78/s
+152%	67	8f	3.13/s