Heads-Up Poker Equity Calculator
Estimates your equity percentage in a heads-up Texas Hold'em hand based on hand strength, board texture, and number of live outs. Use it to study pre- and post-flop all-in decisions.
Last updated: September 2026
Formula below · 1 source (Wikipedia) · Updated Sep 2026
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About this calculator
Equity in poker is the share of the pot you expect to win on average if the hand were run out many times. This calculator is a rough study approximation, not a card-exact equity engine. It starts from a hand-type baseline (pocket pair ≈ 80%, ace-high ≈ 65%, suited connectors ≈ 45%, other ≈ 35%) adjusted for board texture (dry 1.0×, wet 0.85×, paired or coordinated 0.9×). After the flop, your outs become the exact chance of hitting at least one of them: with two cards to come, hit = 1 − (47 − outs) × (46 − outs) / (47 × 46); with one card to come, hit = outs / 46. The rule of 4 and 2 approximates these figures. Hitting an out only helps when you are behind, so the draw adds to the share you would otherwise lose: equity = made + (100 − made) × hit. Pre-flop there are no outs yet, so the draws field is ignored and only the hand baseline counts. The result never exceeds 100%. For card-exact numbers, use an equity calculator that takes both players' hole cards. Understanding your equity guides decisions about calling all-ins, sizing bets, and semi-bluffing with drawing hands.
How to use
You hold suited connectors (base equity 45%) on a wet board (multiplier 0.85) with one card to come and 9 flush-draw outs. Step 1: made-hand equity = 45 × 0.85 = 38.25%. Step 2: chance to hit = 9 / 46 = 19.57%. Step 3: equity = 38.25 + (100 − 38.25) × 0.1957 = 38.25 + 12.08 = 50.33%. Choose Suited Connectors, Wet Board, After Turn (1 card) and enter 9 to confirm. That is close to a coin flip, so the pot odds you are offered decide whether to call. With two cards to come (after the flop) the same 9 outs hit 1 − 38 × 37 / 2162 = 34.97% of the time, giving 38.25 + 61.75 × 0.3497 = 59.84%.
Frequently asked questions
How do I calculate poker equity with outs using the rule of 2 and 4?
The rule of 2 and 4 is a quick mental shortcut: multiply your number of outs by 4 when two cards remain (flop to river) and by 2 when one card remains (turn to river). For example, a flush draw with 9 outs gives roughly 36% equity on the flop and 18% on the turn. This approximation is accurate to within 1–2% for most practical hand situations.
What does board texture mean in poker and why does it affect my equity?
Board texture describes how interconnected the community cards are. A dry board (e.g., K-7-2 rainbow) gives few drawing opportunities to either player, so made-hand equity is preserved. A wet board (e.g., 9-8-7 two-tone) creates many straight and flush draws, meaning your current best hand is more vulnerable. Recognising texture helps you size bets correctly to deny equity to drawing hands.
When should I use an equity calculator during poker study sessions?
Equity calculators are most valuable away from the table during hand review. After a session, identify spots where you were unsure whether to call or fold an all-in, then plug in the hand types and board to see your actual equity. Repeated exposure builds intuition so you can make accurate on-the-fly estimates during live play without needing a tool.