How to use it
Press a card slot and pick its card from the deck, for two to six hands and up to five board cards. Equity is your average share of the pot, with high and low halves and quartered pots counted. Low wins include ties for the low, which pay a quarter of the pot each. The note under the table says how often any hand makes a low.
A worked example
The page opens on A-2-3 with a king and a queen against a jack-high rundown. Before the flop the A-2-3 hand is worth 59.5% of the pot, mostly from the low: holding three of the four lowest ranks, it has the best low draw on most boards. Deal a flop of 4♥ 5♣ 9♠: only two low cards, so a low needs one more on the turn or river, which happens 74% of the time. The A-2-3 hand now has 63.3%.
The rules the calculator follows
Both halves use exactly two hole cards and three board cards. A low is five different ranks from ace to eight, so it needs at least three different low cards on the board; with fewer, the high hand takes it all. Straights and flushes do not spoil a low, so A-2-3-4-5 is the best low and can win the high too. For high-only games use the Omaha calculator.