Straight flush #2 of 10
Five cards in sequence, all one suit. The ace-high one is the royal flush, listed separately. It beats four of a kind and everything below it, and loses to a royal flush and everything above.
How often, card by card
| Cards dealt | Probability | 1 in | Odds against | Count |
|---|---|---|---|---|
| 5 cards: the flop, or five-card draw | 0.00% | 72,193 | 72,192 to 1 | 36 / 2,598,960 |
| 6 cards: the turn | 0.01% | 12,294 | 12,293 to 1 | 1,656 / 20,358,520 |
| 7 cards: the river in hold'em, or seven-card stud | 0.03% | 3,591 | 3,590 to 1 | 37,260 / 133,784,560 |
“Best hand” means exactly this hand and nothing better: a full house also contains a pair, but it counts once, as a full house. These are the odds for any two hole cards; your own starting hand moves them, which is the grid further down.
The working
Straight flush, five cards: nine top cards (5 to K) × four suits; the ace-high ones are royal flushes 9 × 4 = 36 enumerated by the engine: 36 of 2,598,960 probability: 36 / 2,598,960 = 0.0014%
There are 9 different straight flush hands once suits are ignored: Nine: one for each top card from 5 to king. Every one of them can still be your best hand with seven cards.
When two players both have a straight flush
The higher top card wins; the 5-high (steel wheel) is the lowest.
A straight flush beats four of a kind
| T♥6♥ | T♥9♥8♥7♥6♥ | Straight flush, ten high | Wins |
| 9♠2♣ | 9♣9♦9♥9♠8♥ | Four of a kind, nines, eight kicker | Loses |
Check your own showdown in the hand checker →
Straight flush by starting hand
The chance each of the 169 starting hands ends the river with a straight flush as its best hand, from every one of its 2,118,760 boards. 54s makes it most often (0.20%); AKs makes it least often (0.0037%). Averaged over their combinations: pocket pairs 0.016%, suited hands 0.066%, offsuit hands 0.016%.
| Starting hand | Straight flush by the river | 1 in |
|---|---|---|
| 54s | 0.20% | 503 |
| 65s | 0.20% | 503 |
| 98s | 0.20% | 503 |
| 87s | 0.20% | 503 |
| 76s | 0.20% | 503 |
| T9s | 0.20% | 508 |
| 75s | 0.15% | 648 |
| 97s | 0.15% | 648 |
| 86s | 0.15% | 648 |
| 53s | 0.15% | 657 |
| … | ||
| AKs | 0.0037% | 27,164 |
| AKo | 0.0058% | 17,367 |
| AQs | 0.0058% | 17,367 |
Straight flush beats
- Four of a kind 0.17% by the river
- Full house 2.60% by the river
- Flush 3.03% by the river
- Straight 4.62% by the river
- Three of a kind 4.83% by the river
- Two pair 23.5% by the river
- One pair 43.8% by the river
- High card 17.4% by the river
Straight flush loses to
- Royal flush 0.0032% by the river
- Every five-, six- and seven-card hand was dealt and classified by the site's engine (
tools/build-rankings.mjs). The five-card count must equal the formula above or the build fails; the six- and seven-card counts must equal the standard published tables. - The starting-hand figures deal each hand every possible board. Suits are interchangeable, so one deal of each hand gives the exact figure for all its combinations.
- The showdowns above were scored by the same engine; the build fails if any of them comes out differently from what its title says.
- Back to all ten hands. Raw data: rankings.json.