I'm just doing a drill, wanted to make sure I'm doing it right.

So last night I had a hand where I had KT against QQ

It was raised to 40 preflop, so otf pot 80
Flop T 7 4

He checks i bet 45
He check raises all in to 200,
155 for me to call.

I don't have time to post all the long hand, but is it true essentially that the 155 call cost me roughly $60?

Briefly i have roughly ~20% equity in the whole pot of 480
So 96 and I put in 155 at that point so just -$60?

I know this sounds elementary and it probably is. I've just been approaching things from a few angles, mostly w mental math which is turning me around a little bit, and want to make sure I'm doing things correctly.

Im only asking because at the time it kind of seemed like a whatever call getting 2:1 but after looking at it I was pretty shocked that it was actually costing me that much to be wrong here.

Yeah that's correct. The EV calc looks like this:

On the Turn:
20.2% of the time you win 325
79.8% of the time you lose 155

20.2%*325+79.8%*-155 = -58.04

This is a correct method and a pretty good ballpark estimate, yes.

However, just off the top of my head, you may want to rethink a few things about this hand, such as how you got into this spot, what the guy's range really is, and how much your call costs you (or makes you? but probably costs you) against his range, as opposed to his actual hand.

I couldn't agree more.

A little background that I have a little more time. This was a straddle pot w me in the CO and Vil on the straddle. There were a few limps from some loose passive players and the Vil was playing on the fit or fold side, however I only had about 45 minutes of play w him.

I ended up losing a couple buy ins last night and never really seemed to get any traction, but w the exception of several times where I got money in good in smaller pots and had some 10-30% equity hands hit against me, I couldn't really figure out why.

So anyway, this hand came up while I was thinking through some of the 200bb+ hands, and in particular when I looked at the turn call off and tried to assign him a range I noticed that this seemed like a really big error. I played for 4 hours last night and I figured out that this one call off likely killed a huge % of my entire expectation for the session. Anyhow, in retrospect I'm OKish w the open and for sure w the cbet, but the call off was a super blowup that in the heat of the moment I completely dismissed as standard.

Thanks dizzy for writing out the Calc for me and Vernon for confirming, it was bugging the **** out of me this morning and I wanted to make sure that it actually was as bad as I thought it was. Hope you guys generated some extra karma and crush some sessions this week!