Calculating Life Tap

[Clervis]

If I do 400 average physical damage and have Life Tap, how much life would I gain per hit assuming a 33% physical resistance in Hell mode?

[Krupa]

400 * 0.67 = 268

=> 268 * 0.5 = 134

[Clervis]

Ok, that's what I was thinking. Thanks for the verification.

[hubb]

Yep, there's no difficulty or drain effectiveness penalty like for normal leech so the only thing reducing it will be physical res.

[Zoi]

Is there a guide that has info on LL/ML penalties?

[Black Lotus]

Life and mana leech use the same formulas.
Lets just say it doesnt work in pvp (it does, but there is a bug in formula which cuts leech a lot).

In PvM, it works only 50% in NM and 33% in Hell. After that, every target has its own "drain effectiveness" (kind of drain resistance, uber mephisto has 0 so you cant drain from it).
So assuming you have 10% life leech and hit a target with 10% drain effectiveness, 10000 dealt damage in Hell will give you back 10000*(.10)*(.33)*(.10)=33 life.

Life tap isnt leech actually, it just returns life back as said. Also this is the only good "leech" method in PvP.