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Seven2Offsuit

Preflop matchups

77 vs A5s: preflop equity

77 is a clear favorite over A5s.

77

vs

A5s

77 wins

65.6%

Tie

0.4%

A5s wins

34.0%

77 has 65.8% equity, which counts a tie as half a win. The numbers are exact: every one of the 1,712,304 possible boards is counted for each suit combination, not simulated. Suits are shown as examples; the result is averaged over every A5s combination that doesn't share a card with 77.

Try it on a board in the Odds Lab

Questions

Who wins more often, 77 or A5s?
77 is a clear favorite over A5s. All in before the flop, 77 wins 65.6% of the time, A5s wins 34.0% and they tie 0.4%.
What is 77's equity against A5s?
65.8%. Equity counts a tie as half a win, so it is the share of the pot 77 takes on average.
Are these odds exact?
Yes. Every one of the 1,712,304 possible five-card boards is counted for each suit combination, so there is no simulation error.