Your equity
What you end up with
An Omaha odds calculator is the quickest way to unlearn Hold’em instincts. Aces feel like a lock, and in Omaha they’re not: A♠A♦K♠Q♦ against one random hand wins about 69% of the time, and double-suited aces and kings against a jack-high rundown, J♥10♥9♣8♣, are only about 62/38.
The free calculator above handles four-card and five-card Omaha. Type your cards, optionally an opponent’s hand and a board, and it runs 25,000 random deals to give you the equity, win and tie chances and the hands you’ll end up with.
Omaha odds calculator: entering cards
Write each card as rank then suit: As is the ace of spades, Td the ten of diamonds, 9c the nine of clubs. Spaces don’t matter. Leave the opponent empty for a random hand, and add up to five board cards to check a flop, turn or river. With every card known, the result is exact rather than a simulation.
Each run is a sample, so the figure moves by about half a percent from one run to the next. That’s close enough for any decision you’d make at the table.
Why Omaha hands run closer
With four hole cards you have six two-card combinations, and every opponent has six too. Draws come in far more often than in Hold’em, and big pairs get outdrawn more. The one rule that changes everything: you must use exactly two of your hole cards and three from the board. Four hearts in your hand and one on the board isn’t a flush. Two hearts in your hand and three on the board is.
That rule is why hands that work together matter more than high cards. Double-suited hands, where your four cards form two suited pairs, add flush chances in two suits. Connected hands make straights. Four random high cards often don’t help each other at all.
Five-card Omaha
Switch to 5-card Omaha and everything runs closer still. Ten two-card combinations per hand means even more draws, and stronger made hands win at showdown. A set that’s good enough to stack off with in four-card games is often just a decent hand in five-card. For Hold’em equity, use the poker odds calculator; for whether a call is worth it, the pot odds calculator.
PLO swings more than Hold’em. Keep a bigger bankroll for it. BeGambleAware.org is free and confidential if it stops being fun.