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Poker glossary

Expected Value (EV)

What it means

Expected Value (EV) is the average amount you’ll win or lose from a poker decision if you made it thousands of times. It’s the mathematical foundation of profitable poker. Every action - calling, raising, folding - has an expected value measured in chips or dollars. Positive EV (+EV) decisions make money long-term, while negative EV (-EV) decisions lose money.

How it works at the table

You hold A♠ K♠ on the button with 100bb. A tight player raises to 3bb from early position, everyone folds to you. Against their range of strong hands, calling might show +0.5bb EV while 3-betting to 9bb shows +1.2bb EV. The math considers all possible outcomes: winning preflop, flopping well, getting bluffed, cooler situations. If you 3-bet this spot 1,000 times, you’d average 1.2bb profit per hand. That’s why 3-betting is the better play despite sometimes running into AA or KK.

Strategic context

EV calculations drive every professional decision. While you can’t calculate exact EV in real-time, understanding the concept helps you recognize profitable spots. High EV plays often feel uncomfortable - like bluffing into three opponents or calling down with ace-high. The discomfort doesn’t matter. What matters is whether the play profits over thousands of similar spots. This long-term perspective separates winning players from those who make decisions based on fear or results from the last few sessions.

Common mistakes

Players confuse positive EV with guaranteed wins. You can make the perfect +EV decision and still lose the hand - that’s variance. Others ignore thin +EV spots because the edge seems small. Those 0.5bb edges add up to serious profit over thousands of hands. Many players also evaluate EV using incomplete information, considering only their cards while ignoring position, stack sizes, and opponent tendencies.

EV connects directly to pot odds - when pot odds exceed your equity, calling becomes +EV. Understanding EV helps with bankroll management since variance affects even +EV players. The concept extends beyond individual hands to tournament decisions where chip EV differs from dollar EV due to ICM pressure. Master EV thinking and you’ll find profitable spots others miss.