Interactive single-hit model
Ability damage calculator
Enter the unit's in-combat panel values. Presets use current Set 17 item text, not old item versions.
Ability coefficient
The AP number in the ability tooltip300
AP panel
Total AP (%)135 → ×1.350
Critical strike
Crit chance (%)25
Total crit damage (%)140
Damage Amp
Total Damage Amp (%)0 → ×1.00
Target defenses
Magic Resist30
Active MR Shred (%)0 · use strongest active value; Shred does not stack
Durability (%)0
Expected final ability damage
342.7
No crit
311.5
On crit
436.2
Calculation trace
Coefficient
300
= 300.0
AP
× 135/100 = ×1.350
= 405.0
Crit EV
× [1 + 25% × (140% - 100%)] = ×1.100
= 445.5
Amp
× (1 + 0%) = ×1.00
= 445.5
MR
30.0 MR → ×0.769
= 342.7
Durability
× (1 - 0%)
= 342.7
Scope: one magic-damage hit. Champion scripts, item proc damage, executes, repeat casts, shields, healing, and snapshot timing are not modeled.