Poker Equity Calculator — Hand vs Range Analysis

How the Poker Equity Calculator Works

This equity calculator uses Monte Carlo simulation to estimate how often your hand wins against an opponent's range. It runs 10,000 random board run-outs for each calculation, sampling a random hand from the selected range for the opponent in every iteration. You can calculate preflop equity with no board cards, or input flop, turn, and river cards to see how equity shifts as the board develops.

Understanding Hand Ranges

In poker, thinking in terms of ranges rather than specific hands is what separates beginners from intermediate players. A range is the set of all hands your opponent could plausibly hold in a given spot. Rather than guessing your opponent has “ace-king,” you assign a range like “top 15% of hands” based on their position and actions.

Common Range Presets

• Top 10% — premium hands like AA-TT, AKs/o, AQs/o, AJs, KQs. Typical of a tight early-position open.
• Top 20% — expands to include medium pairs, more broadway combos, and suited connectors. Common for late-position opens.
• All Broadway — every combination of T, J, Q, K, A. Useful for modeling opponents who only play face cards.
• Any Pair — AA through 22. Simulates an opponent who always plays pocket pairs.

The Rule of 2 and 4: Quick Equity Estimation

When you're on a draw and need to estimate your equity at the table without a calculator, the Rule of 2 and 4 gives you a fast approximation. Count your outs (cards that complete your draw), then multiply by 4 on the flop (two cards to come) or by 2 on the turn (one card to come).

For example, a flush draw has 9 outs. On the flop: 9 × 4 = 36% equity. On the turn: 9 × 2 = 18% equity. The actual values are 35.0% and 19.6%, so the approximation is close enough for in-game decisions.

The Rule of 4 becomes less accurate above 8 outs because the multiplication slightly over-counts cards that appear on both the turn and river. For high-out draws, subtract 1 percentage point for every out above 8 from your Rule-of-4 estimate.

Using Equity to Make Profitable Decisions

Equity alone does not tell you whether to call, raise, or fold. You need to compare your equity to your pot odds — the ratio of the current pot to the price of your call. If the pot is $100 and you must call $25, you're getting 4-to-1 pot odds, meaning you need at least 20% equity to break even on a call. If the equity calculator shows you have 35%, calling is clearly profitable.

When your equity exceeds your pot odds, you have a profitable call. When it doesn't, you need fold equity (the chance your opponent folds to a raise) to make the play worthwhile. This is why semi-bluffing with a flush draw is so effective — you combine your ~35% equity with the chance your opponent folds.

Equity Realization: Why Position Matters

Raw equity is not the same as realized equity. A hand with 45% preflop equity will not win 45% of the pot in practice — your ability to realize that equity depends on position, skill, and stack depth. Hands play better in position because you act last on every postflop street, giving you more information and more control over the pot size.

Suited connectors like 76s have decent raw equity against a wide range but struggle to realize it from out of position. Conversely, strong hands like pocket aces realize more than their raw equity because opponents often pay off with second-best hands.

Related Strategy Guides

Deepen your understanding of the concepts behind this calculator with our free strategy content:

• Starting Hands Guide — which hands to play and why, ranked by position
• Poker Odds & Outs Guide — calculating your outs and converting them to equity
• Pot Odds Explained — comparing your equity to pot odds for profitable calls
• Poker Odds Calculator — calculate hand-vs-hand odds for specific matchups
• Preflop Range Charts — visual opening range charts by position
• Position Strategy Guide — why position affects equity realization