Pot odds and outs made simple (with the rule of 2 and 4)
Outs are the cards that improve your hand to a likely winner. Pot odds compare the size of the call with the size of the pot. If your chance of hitting is higher than the share of the pot you have to pay, calling is profitable in the long run. The quick way to estimate your chance is the rule of 2 and 4.
Step 1: count your outs
Section titled “Step 1: count your outs”You hold A♥9♥ and the flop is K♥7♥2♣. Any of the nine remaining hearts gives you a flush, so you have 9 outs.
| Draw | Example | Outs |
|---|---|---|
| Flush draw | Four cards of one suit | 9 |
| Open-ended straight draw | 8-7 on a 6-5-K board | 8 |
| Two overcards | A-Q on a 9-6-2 board | 6 |
| Gutshot straight draw | 9-8 on a J-7-2 board | 4 |
| Pocket pair to a set | 5-5 on a K-9-2 board | 2 |
Step 2: the rule of 2 and 4
Section titled “Step 2: the rule of 2 and 4”- On the flop, with two cards to come: outs × 4 ≈ your chance of hitting by the river.
- On the turn, with one card to come: outs × 2 ≈ your chance of hitting on the river.
With 9 outs: about 36% on the flop (the exact figure is 35%) and about 18% on the turn (exact 19.6%).
Step 3: work out the pot odds
Section titled “Step 3: work out the pot odds”Pot odds tell you what share of the final pot you must pay:
call ÷ (pot + bet + your call)
The pot is $20 and your opponent bets $10. You must call $10 to win $30, so the final pot is $40 and you pay $10 of it: 10 ÷ 40 = 25%.
Step 4: compare
Section titled “Step 4: compare”- Your chance of hitting is higher than the pot odds: calling is profitable.
- Your chance is lower: folding is better, unless you expect to win extra money later.
In the example, on the turn with a flush draw you have about 18–20% to hit, but you need 25%. Strictly by pot odds this is a fold. On the flop the same draw has about 35% with two cards to come, which is more than enough if your opponent won’t bet again on the turn.
Implied odds
Section titled “Implied odds”Sometimes you can call with slightly worse odds because you expect to win more money later when you hit, for example when your opponent has a big stack and a strong hand. This is called implied odds. Beginners should use it carefully: hidden draws like a set from a small pair have better implied odds than obvious flush draws.
Quick reference
Section titled “Quick reference”| Outs | Flop to river (×4) | Turn to river (×2) |
|---|---|---|
| 2 | 8% | 4% |
| 4 | 16% | 8% |
| 6 | 24% | 12% |
| 8 | 32% | 16% |
| 9 | 35% | 19% |
The rule is an estimate; the table uses the rounded real percentages for 8 and 9 outs.
What are outs in poker?
Section titled “What are outs in poker?”The unseen cards that improve your hand to one that is likely to win.
What is the rule of 2 and 4?
Section titled “What is the rule of 2 and 4?”Multiply your outs by 4 on the flop or by 2 on the turn to estimate your chance of hitting by the river.
How do you calculate pot odds?
Section titled “How do you calculate pot odds?”Divide the amount you must call by the total pot after your call. A $10 call into a $40 final pot is 25%.
What are implied odds?
Section titled “What are implied odds?”Extra money you expect to win on later streets if you hit, which can justify a call with slightly worse pot odds.