Talk:Armor penetration/@comment-8957269-20130513020131

Some calculations, tell me if i'm right. I want to go a full armor pen jarvan, here's the build  (there's an error there, marks and quints armor pen = 19 not 25). So i have 55 | 40% armor pen + 26 % armor reduction from my rank 5 q + 5% per stack from the tbc. Let's assume i'm going to kill draven (level 18, 2034 hp, 130 armor (GA)). The combo is E, Q, R, +AA.

% ARMOR REDUCTION

Q will reduce armor by 26% adding a 5% stack on tbc = 29,7% armor reduction                              130 armor --> 91.4

R will add another 5% stack on tbc = 33.2% armor reduction                                                   91.4 armor --> 86.8

AA, another 5% from tbc (3 stacks frome the start of the combo) = 36.6% armor reduction           86.8 armor --> 82.5

AA, 2 stacks 10% from tbc (full stacked) = 42.9% armor reduction                                                                           82.5 armor --> 47.1

% and FLAT ARMOR PENETRATION (55 | 40%)

91.4 armor - 40% = 54.84                                                                                                                  54.84 armor - 55 = 0 True Damage

So if it is really true damage on all my abilities and AA for 3 s (Q's shred last 3 sec - 4.8 s cd)

Q damage = 250(+221) = 471                                                                                                         R damage = 450(+301) = 751                                                                                               AA + passive = 305(+81.2) = 386.2                                                                                                   2 x AA = 305 + 305 = 710

total burst = 2218.2 damage.