Poker Odds Calculator
Enter your number of outs to instantly calculate your probability of hitting on the turn, river, or both. Uses exact probabilities and the popular Rule of 2 and 4 shortcut.
How Poker Outs Work
An "out" is any unseen card that completes your hand. After the flop, 47 unknown cards remain (52 minus your 2 hole cards minus 3 community cards).
Exact Formulas
- Turn odds = Outs / 47
- River odds = Outs / 46
- Combined odds = 1 - ((47 - Outs)/47) x ((46 - Outs)/46)
The Rule of 2 and 4
A fast mental shortcut used at the table:
- One card to come: Multiply outs by 2 for approximate percentage
- Two cards to come: Multiply outs by 4 for approximate percentage
This approximation is surprisingly accurate for 1 to 15 outs.
Common Out Counts
| Draw | Outs | ~Turn+River % |
|---|---|---|
| Flush draw | 9 | ~35% |
| Open-ended straight | 8 | ~31% |
| Gutshot straight | 4 | ~17% |
| Two overcards | 6 | ~24% |
| Set from a pair | 2 | ~8% |