8 outs (open-ended straight draw), odds and equity
8 outs wins 31.5% of the time with two cards to come and 17.4% with one. That is enough to call a half-pot bet on the flop. The 2-and-4 shortcut estimates 32.0%.
Which draws have 8 outs
- An open-ended straight draw
- A double gutshot
Exact versus shortcut
| Street | Exact equity | 2-and-4 estimate | Drift |
|---|---|---|---|
| Flop (two cards to come) | 31.5% | 32.0% | +0.5 |
| Turn (one card to come) | 17.4% | 16.0% | -1.4 |
What 8 outs can call
Comparing your equity against the price each bet size offers. Green means the call breaks even on pot odds alone.
| Bet size | Equity needed | You have | Verdict |
|---|---|---|---|
| Quarter pot | 16.7% | 31.5% | Call |
| Third pot | 20.0% | 31.5% | Call |
| Half pot | 25.0% | 31.5% | Call |
| Two-thirds pot | 28.6% | 31.5% | Call |
| Three-quarter pot | 30.0% | 31.5% | Call |
| Pot | 33.3% | 31.5% | Needs implied odds |
Questions about 8 outs
What are the odds with 8 outs?
8 outs is 31.5% to hit by the river with two cards to come, and 17.4% with only the river left. Those are exact figures, not the 2-and-4 approximation.
What draw has 8 outs?
An open-ended straight draw. A double gutshot.
What is the biggest bet 8 outs can call?
On the flop, a half-pot bet, anything up to 46% of the pot breaks even on pot odds alone. Implied odds can stretch that; being out of position shrinks it.
How far off is the 2-and-4 rule at 8 outs?
The shortcut says 32.0% from the flop against an exact 31.5%, so it is 0.5 points high. The drift grows with the number of outs.
Nearby out counts
- Next stepPut this against a real bet31.5% only means something next to the price you are being offered. The pot odds calculator takes the pot and the bet and gives you the answer in one line.
- 4 outs, gutshot straight draw16.5% from the flop
- 6 outs, two overcards24.1% from the flop
- 9 outs, flush draw35.0% from the flop
- 12 outs, flush draw with a gutshot45.0% from the flop
- All out counts1 to 21
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