Overbetting the pot all-in

[Percy101]

When is it correct to do this? I think I may be losing extra $ in situations where I value bet for less than the pot when it would appear that the opponent has a strong enough hand/is loose enough to call an allin either on the turn or river.

Example:

Party Poker No-Limit Hold'em, $ BB (6 max, 4 handed) converter

Hero ($81.45)
Button ($44.70)
SB ($47.90)
BB ($47.94)

Preflop: Hero is UTG with J[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img]. SB posts a blind of $0.25.
<font color="#CC3333">Hero raises to $2</font>, Button calls $2, <font color="#666666">2 folds</font>.

Flop: ($4.75) T[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $3</font>, Button calls $3.

Turn: ($10.75) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $7</font>, Button calls $7.

River: ($24.75) Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $15</font>, Button calls $15.

Final Pot: $54.75

In such situations I have a tendency to bet less to ensure a call, only to be shown a hand which I beat that would probably have called an overbet often enough to show a profit. Any help in calculating when it is better to just push would be much appreciated.

Thanks