PSA this is how you do math. (effective health is not how you calculate damage you receive)

Genghis Khat·3/21/2019, 11:22:23 AM·7 votes·5,550 views

(numbers here are examples)

37 magic resist = 27% magic reduction (look at how much damage it reduces) so its 1283(total damage)*27%(reduction) = 346,71 is reduced. 1283-346 = 936 (dealt damage) do the same with physical reduction with its numbers magic damage + physical damage = total damage health - total damage

HOW NOT TO CALCULATE DAMAGE RECEIVED* 973 x 1.37(effective health (37 = magic resistance but not %) - 1120(damage total) = 113

effective health is not real way to calculate how much damage you are receiving.

(backstory) I was just told lux level 6 with ludens cant oneshot katarina level 6 with no mr runes. so i went in game and oneshot katarina with lost chapter even though the other person did his perfect effective health math saying that ludens cant oneshot level 6 but i did it with 50 less ap - ludens passive.

10 Comments

ModThe Djinn3/21/2019, 12:05:26 PM15 votes

The most accurate is just using the exact formula that League uses:

If Resist >= 0: Damage x (100 / (100 + Defense))
If Resist < 0: Damage x (2 - 100 / (100 - Defense))

So if you're dealing 1283 damage into 37 MR, you're dealing 1283 x (100 / (100+37)), or 936.5 damage. Your numbers off for a bit for reasons I'm not sure of. Probably math.

Note, however, that this is the same as having 27% effective health: both formulas, when properly calculated, return equivalent damage values needed to kill you. Watch:

Effective Health = Health x ( 1 + (0.01 x Resist))

So with 1000 health and 100 resist we'd be looking at 2000 effective health. Let's test that with the formula above for damage: 2000 = [Damage] x (100 / (100 + 100)).

That gets us 1000 (health we have) = [Damage] x 0.5, which means we need 2000 damage to kill us. That's exactly what our 2000 effective health calculation indicated, and what the 100 MR = 100% more effective health would indicate.

So the secret is they're both right! MATH!

SanKakU3/21/2019, 3:54:13 PM1 votes

I just look at the damage taken and damage mitigation numbers and add them together. That's how much health I used to die that many times. It's telling to see how unskilled some players are when this total damage points number is so low for a high number of deaths. This math backs up my own personal observations from playing a game or watching a replay.

Kumiho Ahri3/21/2019, 10:05:59 PM1 votes

He just used the wrong AP values and missed one AA

I added an additonal AA because he calculates with 3 passiv procs and I added Adaptive Force to the total AP Lux Health - 825, Armor - 34, MR - 32, AP 123, AD 66. Dorans, Ludens, 18 Adaptive Force Lux will auto 3 times during her combo, (198 physical damage) She will proc passive thrice [70x3=210] 210 + 60% ap (284 magic damage) She will Q for 70 + 70% ap (156 magic damage) She will E for 150 + 60% ap (224 magic damage) She will R for 300 + 75% ap (392 magic damage) Ludens will proc for 112 damage (112 magic damage) she will electrocute for 74 + 25% ap (105 magic damage)

Totals

1273 Magic Damage 198 physical damage

973x1.37 - 1273 = 60 60x1.41 - 198 = -113 (Dead)

Edit:

Without Adaptive Force the rotation loses 54 mag. dmg the end result changes to -37HP.

Crimson Mutt3/21/2019, 10:26:26 PM1 votes

I read that as "this is how you do meth" and was severely disappointed.