Pot odds trainer

Each hand gives you a draw on the flop or the turn, the pot and a bet. On the turn your opponent bets and one card is still to come. On the flop your opponent goes all in, so if you call you see both the turn and the river.

The right answer comes from two numbers. The first is the share of the pot you must win: your call divided by the pot after your call. A $40 call that makes the pot $160 needs 25%. The second is the chance your outs come: on the turn, your outs divided by the 46 cards you cannot see, and on the flop, one minus the chance of missing twice. Call when the chance is higher and fold when it is lower. When the two are less than 1.5 percentage points apart, either answer counts.

The trainer counts every out as a win and every other card as a loss, so it trains the pot odds alone. At the table an out can still lose, for example when it pairs the board and gives someone a full house, and a hit can win more on the next street. For those, use the pot odds calculator and the implied odds calculator. The score stays until you leave the page, and nothing is stored.

The quick rule at the table: multiply your outs by 2 with one card to come and by 4 with two. Nine outs give about 18% on the turn and 36% on the flop, against 19.6% and 35.0% worked out exactly. Above eight outs the rule of 4 runs high: 15 outs give 60% by the rule and 54.1% exactly.