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EHP
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Claud Tiberius
#1 - 2014-05-28 14:10:49 UTC
Sorry if this has been asked before, I've done a quick search and couldn't find what I was looking for...


How is EHP calculated? Specifically. That number the fitting tool comes up with in eve. I know its based off many resistances, hp amounts, incoming damage types (in eve the game assumes the damage types are all 25% each) and other numbers...

If someone could find and explain the formula, that would be much appreciated :)

Once upon a time the Golem had a Raven hull and it looked good. Then it transformed into a plataduck. The end.
Aerie Evingod
Midwest Miners LLC
#2 - 2014-05-28 15:01:04 UTC
EHP in game is calculated by taking your lowest resist for each shields, armor and structure and then adding the three together.

For example if you have a ship with 1000 shields, 1000 armor and 1000 structure and your lowest resists for each are 20%, 50%, and. 60% respectively then your EHP is: (1000/(1-.2)) + (1000/(1-.5)) + (1000/(1-.6)).

EFT uses an average of your resists for each shield armor and structure and that's why EHP in game is different than EFT.
Maeltstome
Ten Thousand Days
#3 - 2014-05-28 17:30:28 UTC
Aerie Evingod wrote:
EHP in game is calculated by taking your lowest resist for each shields, armor and structure and then adding the three together.

For example if you have a ship with 1000 shields, 1000 armor and 1000 structure and your lowest resists for each are 20%, 50%, and. 60% respectively then your EHP is: (1000/(1-.2)) + (1000/(1-.5)) + (1000/(1-.6)).

EFT uses an average of your resists for each shield armor and structure and that's why EHP in game is different than EFT.


To expand on the rather informative post above mine:

Armour HP: 1000
Resistance: (EM+Therm+Kin+Expl)/4, (50+35+25+10)/4 = 120/4 = 30
Effective HP: 1000/(1-30/100) = ~1430 EHP

However your Effective HP depends on the incoming damage type. The higher your resistance to the damage type, the higher your effective hit points are. The inverse of this is true.
Claud Tiberius
#4 - 2014-06-01 02:34:55 UTC
Maeltstome wrote:
Effective HP: 1000/(1-30/100) = ~1430 EHP


How come you are you dividing by 100 and Aerie Evingod didn't?

Once upon a time the Golem had a Raven hull and it looked good. Then it transformed into a plataduck. The end.
Chris Winter
Science and Trade Institute
Caldari State
#5 - 2014-06-01 02:43:37 UTC
Claud Tiberius wrote:
Maeltstome wrote:
Effective HP: 1000/(1-30/100) = ~1430 EHP


How come you are you dividing by 100 and Aerie Evingod didn't?

Because Aerie did 50% as .5, in order to get to that you need to divide by 100.

When you use a percentage in a formula, you need to divide by 100. So 5% becomes .05.
Claud Tiberius
#6 - 2014-06-01 04:14:28 UTC
Chris Winter wrote:
Claud Tiberius wrote:
Maeltstome wrote:
Effective HP: 1000/(1-30/100) = ~1430 EHP


How come you are you dividing by 100 and Aerie Evingod didn't?

Because Aerie did 50% as .5, in order to get to that you need to divide by 100.

When you use a percentage in a formula, you need to divide by 100. So 5% becomes .05.


ooooh haha, I see ty.

I usually never do that, decimal points give just as much information.

Once upon a time the Golem had a Raven hull and it looked good. Then it transformed into a plataduck. The end.
Gregor Parud
Imperial Academy
#7 - 2014-06-01 11:28:58 UTC
Also note that EHP assumes specific resists. In game fitting window uses your lowest resist (which is dumb as hell if you're doing pve, no one cares about his 0% EM resists if he's doing Guristas), EFT uses an average as of standard, until you implement and select damage profiles.

So, don't compare EHP in game vs EFT, because they're not the same and generally just ignore EHP for PVE all together. For PVP you're probably best off to use the standard EFT number or actually import different profiles to test how it holds against specific weapons and ammo.