Equity

Equity is the mathematical foundation of poker decision-making. Every hand has a certain probability of winning against every other hand or range, and this probability is expressed as equity. Preflop, hand equities are calculated by running all possible board combinations and determining how often each hand wins. For example, AA has roughly 85% equity against a random hand, but only about 80% against KK. Understanding these preflop equities helps you evaluate the strength of your holdings and make better decisions about raising, calling, and folding. Equity comes in two flavors: raw equity and realized equity. Raw equity is the pure mathematical chance of winning at showdown. Realized equity accounts for the fact that positional advantage, skill, and the ability to make postflop decisions affect how much of your theoretical equity you actually capture. A hand like 72o might have 35% raw equity against a BTN opening range, but its realized equity is much lower because it plays terribly postflop and rarely wins without improving. Equity versus specific hands is straightforward to calculate, but equity versus ranges is more nuanced. When you face a 3-bet, you estimate the opponent's 3-bet range and calculate your equity against that range to decide whether calling, 4-betting, or folding is most profitable. Tools and range calculators help with these computations, but developing an intuitive sense of how different hand types perform against various ranges is essential for in-game decisions. In tournament poker, raw equity is modified by ICM, which assigns different monetary values to different chip outcomes.