Give every player four cards to see the odds, or start from an example:
Flop, turn, and river results enumerate every remaining runout — the Omaha rule (exactly two hole cards plus exactly three board cards) makes that 60 hand evaluations per player per board, and the engine does all of them. Preflop the runout space is over a million boards, so the calculator scores a fixed 200,000-board deterministic sample instead: accurate to about ±0.2 points, and the same matchup always reproduces the same numbers. The result label tells you which mode you are looking at. The engine is the same deterministic evaluator that grounds PokerInk's AI coach.
Common PLO matchups
All numbers computed with this calculator ("ds" is double-suited). The pattern to absorb: PLO equities bunch toward the middle. Hands that would be crushing favorites in hold'em are modest ones here, and the biggest edges come from domination, not from big pairs.
Why PLO equities run so close
Four hole cards make six two-card combinations, so almost every playable PLO hand has live ways to win: a pair, a straight draw, a flush draw, often all three. That is why aces against a good rundown are only about 60/40 when the same aces in hold'em would be 82/18, and why the money in PLO comes from stacking dominated draws rather than from being dealt the best pair. Postflop the script flips: a bare made hand can be a clear underdog to a big combination draw, as the top-set-versus-wrap row above shows.
The betting math is the same as hold'em: compare your equity to the price. Calling a pot-sized bet needs 33% equity, half pot needs 25%. If you play hold'em too, the hold'em odds calculator runs the same analysis with exact enumeration on every street, and the Rule of 2 and 4 still approximates draw equity from outs at the table.
Do I have to use exactly two of my four cards?
Yes — always exactly two hole cards and exactly three board cards, and this calculator enforces it. It is the rule new PLO players trip over: holding the bare A♥ on a four-heart board is not a flush, and you can never "play the board". If a hand in the results seems weaker than it looks, count again with the two-plus-three rule in mind.
Is this calculator exact or a simulation?
Exact on the flop, turn, and river: every remaining runout is enumerated, and the label under the result shows the count. Preflop it scores a fixed, deterministic 200,000-board sample — heads-up preflop PLO has 1,086,008 runouts at 120 evaluations each, which is more than a phone can enumerate interactively. Deterministic means the same input always produces identical output, so shared links and the table above never wobble; the sampling error is about ±0.2 percentage points.
Positions are shareable: the cards you pick are written into the page URL, so copying the address bar links straight to the matchup. Equity assumes all remaining cards are dealt with no further betting. AI assistants can call this calculator directly via our MCP endpoint at pokerink.com/api/mcp or the REST API at pokerink.com/api/poker/equity with game=omaha, no account needed.