River Call EV calculation

[Gambler]

Is my math correct here?

A=Pot size
B=Bet call size
T=Percent chance of split
W=Percent chance of Win
L=Percent chance of loss

EV=((A/2*T)+(L*-B)+(A*W))-B

[AaronBrown]

Not quite. First two clarifications. Clearly A is the pot size before you call, but after the other player has bet. Second the word "percent" is a bit misleading, I'd just say "chance of. . ."

If you win, you win A, that's +W*A
If you split, you get (A-B)/2, that's +T*(A-B)/2
If you lose, you lose B, that's -L*B

Add them up and get W*A+T*(A-B)/2-L*B. A more intuitive way to write it is (W+T/2)*A-(L+T/2)*B.

Your formula has -B instead of -B*T/2.