Convert outs to equity using the Rule of 2 and 4, or exact combinatorics
Convert outs to win probability
Cards that complete your draw (0-20)
Common Draws (click to use):
Enter to see if your draw is profitable
Your draw strength
Exact Equity
35.0%
Rule of 4
35.0%
Outs
9
Pot Odds Needed
1.9:1
Quick reference for typical draws
| Draw Type | Outs | Turn Only | Turn+River |
|---|---|---|---|
| Flush Draw | 9 | 18% | 35% |
| Open-Ended Straight Draw | 8 | 16% | 32% |
| Gutshot Straight Draw | 4 | 8% | 16% |
| Two Overcards | 6 | 12% | 24% |
| Flush + Gutshot | 12 | 24% | 44% |
| Flush + Open-Ender | 15 | 30% | 53% |
| Set to Full House/Quads | 7 | 14% | 28% |
| One Pair to Two Pair/Trips | 5 | 10% | 20% |
| Pocket Pair to Set | 2 | 4% | 8% |
Common poker draw scenarios
Step by step guide
Multiply outs × 2 for equity to next card only (e.g., flop to turn). Quick estimate for single-street decisions.
Multiply outs × 4 for equity over two cards (turn + river). Use on the flop when you expect to see both cards.
TL;DR summary
Poker outs are cards remaining in the deck that complete your drawing hand. Count your outs, then use the Rule of 2 and 4: multiply outs by 2 for turn-only equity, or by 4 for turn+river equity. Example: A flush draw has 9 outs × 4 = ~36% equity to hit by the river. Adjust for blockers and reverse implied odds when opponents may hold your outs.
Important things to know
Common questions about poker outs
Count the cards that will complete your hand. For a flush draw with 4 cards of a suit showing, there are 9 remaining (13 - 4). For a straight draw, count cards that complete it. An open-ended straight draw has 8 outs; a gutshot has 4 outs.
A quick way to estimate equity: multiply your outs by 2 to get your approximate equity for one card (turn only), or by 4 for two cards (turn and river). This is slightly optimistic for high out counts but accurate enough for most decisions.
The rule of 2/4 is an approximation. Exact equity uses combinatorics. With 9 outs and 47 cards remaining, turn equity is exactly 9/47 = 19.1%, not 18%. The difference grows with more outs. Use exact calculations for close decisions.
Discounted outs account for the possibility that some of your outs give you the second-best hand. If you have a flush draw but suspect an opponent has a higher flush draw, you should discount some outs. Also discount outs that pair the board when you might lose to a full house.
Add your outs but subtract overlapping cards. A flush draw (9 outs) + open-ended straight draw (8 outs) doesn't give you 17 outs because 2 cards complete both draws. So it's 9 + 8 - 2 = 15 outs.