What this Omaha odds calculator does
Pot Limit Omaha equity, done the way the game is scored: exactly two cards from the hand and three from the board, with the best of the sixty possible combinations taken for each player on every run-out. That rule is what makes Omaha hard to estimate by eye and what most quick calculators get wrong at the edges, such as a hand with four hearts "having a flush draw" when it can only ever use two of them. This one checks all sixty combinations per player per board, or 100 and 150 for the five- and six-card games, and never lets a hand use three of its own cards.
Flop, turn and river match-ups are enumerated exactly. Preflop heads-up there are 1,086,008 possible boards and 130 million evaluations, which is more than a browser should be asked to do while you wait, so preflop runs Monte Carlo for about a second and a half and shows the margin of error. Run longer takes it to around a million trials. Every preflop number on this page was computed with the full enumeration offline, so the examples are exact.
How to enter hands
Four cards per player, no spaces inside a hand, spaces between hands: AhAsKhKs JhTs9d8c. Up to six players. Switch the variant above the field for five-card or six-card Omaha and the hands take five or six cards. A hand can be partial, so AhAs is aces with two random cards, which is the right baseline when you want to know how aces do against a specific rundown without picking side cards. Board and dead cards work as in Hold'em. Hi/Lo is on its own page, the Omaha Hi/Lo odds calculator, because split pots need different columns.
Worked examples, computed by this engine
| Match-up | Equity | Method | |
|---|---|---|---|
| AAKK double-suited vs JT98 double-suitedAhAsKhKs vs JhTs9h8s | 66.40% / 33.60% | Exact · 1.1M deals | Load → |
| AAKK double-suited vs JT98 rainbowAhAsKhKs vs JcTd9h8s | 68.28% / 31.72% | Exact · 1.1M deals | Load → |
| AA72 rainbow vs JT98 double-suitedAhAs7c2d vs JhTs9h8s | 49.76% / 50.24% | Exact · 1.1M deals | Load → |
| Top set vs 13-card wrap, flopQcQdAhKh vs JhTs9d8c on Qs7d6h | 60.12% / 39.88% | Exact · 820 deals | Load → |
| Nut flush draw + pair vs top two, flopAhKh9c9d vs QsJs7h7d on Qh7s4h | 30.98% / 69.02% | Exact · 820 deals | Load → |
| Three-way preflopAhAsKhKs vs JhTs9d8c vs QcQdJdTd | 59.67% / 20.15% / 20.18% | Exact · 658k deals | Load → |
The first three rows are the ones to memorise. Aces with kings double-suited is the best starting hand in the game, and against a double-suited rundown it is a two-to-one favourite, not the four-to-one that aces enjoy in Hold'em. Take away the suits and the kings, and bare aces with two rags are a slight underdog to J-T-9-8 double-suited. That single number explains more about PLO than any strategy article: the rundown has straight draws on most boards and flush draws on many, and only needs one of them, while A-A-7-2 is one pair that cannot improve much.
The flop examples show the other side. Top set against a thirteen-card wrap is 60-40, which sounds close until you remember that the set is the one with the made hand. A nut-flush draw with a pair against top two is a 31% underdog on the flop, which is roughly its outs and no more; there is no hidden equity in Omaha draws, only the visible kind.
Reading the results
Equity is the share of the pot you expect over all run-outs, and in Omaha ties are rare enough that it is usually equal to the win percentage. The Hand distribution button is more useful here than in any other game: it shows how often a hand ends as a straight, a flush, a full house or quads, and how often each of those actually wins. A rundown that makes a straight 30% of the time but wins with it 22% of the time is being outdrawn by flushes on the same boards, and that is a thing you want to know before you play for stacks.
Why Omaha equities run so close
Every player holds six two-card combinations instead of one. A hand with coordinated cards is really six Hold'em hands at once, which is why nothing is ever a lock preflop and why even the worst four cards have close to 30% against the best. The flip side is that post-flop equities polarise fast: once the board has three cards, a hand either has a lot of outs or almost none, and the calculator will show you 85-15 on the flop in spots that were 55-45 before it. That is the whole argument for the pot-limit betting structure and for playing fewer, better-coordinated hands.
For the pot-odds side of a PLO decision, the pot odds calculator turns the equity into a call-or-fold against a given bet. For Hold'em and Short Deck there are separate calculators, each with its own deck and ranking.
Frequently asked questions
Heads-up with eight cards known, there are 1,086,008 possible boards and each one needs 60 five-card evaluations per player to find the best two-plus-three combination. That is 130 million evaluations, which is too much for a browser tab in a reasonable time, so preflop runs Monte Carlo and shows the margin of error. Flop, turn and river spots are small enough to enumerate fully and are exact.
The default run is around 150,000 trials, which puts the 95% margin at roughly plus or minus a quarter of a point. Run longer takes it to around a million trials and under a tenth of a point. For a decision at the table either is more precision than you can use.
Yes. Switch the variant above the hands field. The rule stays two from the hand and three from the board; the calculator checks 10 two-card combinations from a five-card hand and 15 from a six-card hand against all 10 three-card board combinations.
Because in Omaha a rundown like J-T-9-8 double-suited has straight and flush draws on a huge share of boards, and it only needs one of them to come in. Aces are a favourite but never a lock: against a random hand AAxx is around 65-70%, and against a coordinated rundown it is in the 60s. That is why pot-limit matters.
Yes. Type the cards you know; the rest are dealt at random. AhAs on its own is 'aces with two random cards', which is a useful baseline against a specific rundown.
That is a separate page, the Omaha Hi/Lo odds calculator, because the split pot needs different columns: high share, low share, scoop percentage and how often a low qualifies at all.
