Pot Odds Calculator

Divide what the call costs you by the total pot after you call. Facing a $50 bet into a $100 pot, you pay $50 into a $200 pot, so you need to win 25% of the time to break even.

3 to 1, which means you need 25% equity. A pot-sized bet lays 2 to 1 and needs 33%; a one-third-pot bet lays 4 to 1 and needs 20%. Those three are worth memorising, since most bets sit near one of them.

The money you expect to win on later streets when you hit, on top of what's in the pot now. They can justify a call that pot odds alone don't — but only against an opponent who will actually pay you off. Against someone who folds when the flush comes in, your implied odds are zero.

The mirror image: money you expect to lose after you hit but are still behind. Drawing to a weak flush against a range containing better flushes is the classic case, and it is why second-nut draws are worth much less than they look.

Close, and it drifts. Multiplying outs by four from the flop overstates your equity by two to four points once you have more than about nine outs — a 15-out draw is 54%, not 60%. This calculator uses the exact hypergeometric probability instead.