Thanks for your help, :

Lets suppose this situation:

initial_stack =40

-Blinds(dead) = 1.5

-Hero OR= 2.5

-Villain raise = 9

-Villain fold = 20%

-Equity = 44%

Then-->actual_pot = 13, final_pot = 81.5

There are 2 usual formulas to calculate EV:

1)EV=(%Fold*actual_pot )+((%Call*((Equity*final_pot )-Bet))

Where Bet= Stackinicial - (hero amount invested)

EV = (0.2*13)+((1-0.2)*((0.44*81.5)-(40-2.5)))=1.288

2)EV = (%Fold * actual_pot)+(%Call(((Equity * Money_to_win)) - ((1-Equity)*Money_lost)))

Where Money_to_win= initial_stack + (Blinds(dead))

Where Money_lost= initial_stack - (hero amount invested) -->Bet

EV = (0.2* 13)+(0.8*(((0.44 * (40+1.5))) - ((1-0.44)*(40-2.5))))=0,408



which of the 2 formulas is right?or...where am i making a mistake?

solved. ty

Since you posted the problem and probably some readers spent some time on it, I think it would be good if you pointed out where in the second equation you made a mistake.

Also, it should be noted that OP assumed that hero went all in after villain raised.

You are right...sorry.
The problem is in the 2nd formula in Money_to_win= initial_stack + (Blinds(dead)), this is not correct, it should be Money_to_win= actual_pot + initial_stack-villain_raise