I am trying to do this and having a really hard time, I know we can use Flopzilla and other programs but I want to know how we do it live? How do we calculate Equity vs a Range at a live game? Please help, thanks.

You do it the same way you'd do it online, but simplify stuff to make it reasonable

Can you please provide a example sixfour? 😊

I have another question, it is unrelated to Equity vs Range.

Hero has AJ

Hero has given the Villian a Range of QQ, KK, 55, 44

The flop is 5410

Against the KK, QQ, hero equity is 48 using the rule of 4 and 2(hero has 12 outs, 9 Spades and 3 Aces).

Against the 55, 44 hero has 8 outs and his equity should be 32(4x8=32) but when I put it into the system it comes as 25%.

What am I doing right and what am I doing wrong.

Well let's say we've got a middling pair and get repopped, suppose we think his range is around 20% overpairs, 50% two overs, and 30% random stuff we're really good against - you know we're about 20% against the overpair, 50/50 against overs and at least 70% against random crap, so that 4% plus 25% plus 21% which is bang 50/50

Caution, this gets a little tedious, read at your own risk

So, to build on 6-4's comments, You classify the different hands in the range, and then weight them by how many combos of each should be in that range. Let's say you have TT versus a short stack open shove. you decide his range is AJ+, KJ+, 22+. You know you are 20% against JJ, QQ, KK, and AA. You are 80% against 99, 88, 77, 66, 55, 44, 33, and 22. And you are roughly 50% against AJ, AQ, AK, KJ, KQ. You also know that two unmatched cards are 2.5 times as likely to occur as a pair. So, you have 24 combos of overpair, 48 combos of underpair, and 80 combos of over card. That is 152 combos in his range

So
hand type percent of range equity against
overpair 15.8 20%
Underpair 31.6 80%
Overcards 52.6 55%

Taking a weighted average, your equity of TT against AJ+, KJ+, 22+ is 57.37%

Jumping over to equilab, it reports the equity as....58.10% (not bad for a quick estimation)

So, it is really hard to calculate your euity against a range at the table. Your best bet is to work with an equity calculator against common situations and memorize them, so you can roughly estimate your equity while in a live hand. you can do rough approximations. After I am done with a session, I will run through, in my head, any interesting decisions I made, and estimate my equity at the time of the decision, then compare it to an equity calculator

In general, Rule of 4 or Rule of 2 are good approximations useful for beginners. But they should not be relied upon exclusively.

In specifics, if Villain has either 55 or 44, Hero can lose to a full house (or quads) even if he makes his flush.

When computing Hero's overall equity vs that range, remember that there are twice as many KK and QQ combos available than 55 and 44 combos. So you would need to weight those equities in a 2:1 ratio.