Poker Flush Odds Calculator
Probability of flush-type hands in 5-card poker
🔒 Browser-side · Method · · Disclaimer · Poker Flush Odds Calculator
Working out probability of flush-type hands in 5-card poker is easier with Poker Flush Odds Calculator, which answers as you type. Just enter Cards of the Same Suit Needed (1–5 of 5); Poker Flush Odds updates the result as you type. The answer from Poker Flush Odds arrives with its working attached. Poker Flush Odds suits budgeting and planning checks. Poker Flush Odds runs in your browser. Everyday Life data stays in the tab. Looking for poker flush odds calculator 5 card probability combinations straight or free online poker flush odds calculator? Poker Flush Odds covers both. Keep Poker Flush Odds bookmarked for next time. No sign-up or email — Poker Flush Odds answers as you type.
What the defaults give
All five cards of the same suit has a probability of 0.1981%.
That is about one hand in 505 — rare enough to be worth noting and not rare enough to be a jackpot.
The odds of a flush
There are 2,598,960 different 5-card hands (52 choose 5). A flush is five cards of one suit: 4 suits × 1,287 combinations = 5,148 hands once straight flushes are included.
| Hand | Ways | Probability |
|---|---|---|
| Flush (excluding straight flush) | 5,108 | 0.1965% |
| Straight flush (excluding royal) | 36 | 0.00139% |
| Royal flush | 4 | 0.000154% |
| Any flush (including straight) | 5,148 | 0.1981% |
So a flush turns up roughly once in every 509 five-card hands. Related: random number generator and statistics guides.
How the count works
There are 2,598,960 possible five-card hands. A flush needs all five from the same suit, and there are 1,287 such combinations per suit:
Flush hands = 4 × C(13,5) = 4 × 1,287 = 5,148, and 5,148 ÷ 2,598,960 = 0.198%.
Worked examples
5 of the same suit → 0.198% (about 1 in 505)
4 of the same suit → roughly 2.9%
3 of the same suit → roughly 19.6%
2 of the same suit → roughly 42.3%
Flush versus straight flush
The 5,148 figure includes the 40 straight flushes, which are counted separately in poker hand rankings. Excluding them leaves 5,108 combinations, so an ordinary flush is about 0.1965% — a difference that does not change the conclusion, but it is why different sources quote slightly different percentages.
Why the numbers feel wrong at the table
- You notice the rare ones. A flush gets remembered and a broken three-flush does not, which inflates the perceived frequency.
- Suited starting hands help. Holding two of a suit makes a flush meaningfully more likely, and players choose those hands deliberately.
- Partial information. Once three suited cards are on the board, the probability of a flush by the river is much higher than the pre-deal figure.
- Multiple players. At a full table, someone holding a flush is far more likely than you holding one.
Treat these as pre-deal baseline probabilities. Once cards are visible, the conditional odds are a different and more useful calculation.
The 5,148 ways include 40 straight flushes, so an ordinary flush is 5,108 of 2,598,960 hands. The distinction matters for ranking, not for the odds of seeing one: about one hand in 505 either way. Suited starting cards change the picture substantially — holding two of a suit leaves eleven cards of that suit in the deck, which is why flush draws are played and offsuit hands are folded.
Frequently Asked Questions
What are the odds of a flush in five cards?
About 0.198%, or roughly 1 in 505, including straight flushes. Excluding them it is about 0.1965%.
How many possible five-card hands are there?
2,598,960 from a 52-card deck. Every hand probability is that total divided into the number of ways to make the hand.
How many flush combinations exist?
5,148 across four suits, of which 40 are straight flushes, leaving 5,108 pure flushes.
Does holding suited cards change the odds?
Yes, substantially. Starting with two of a suit removes two cards from the deck but leaves eleven of that suit available for the remaining three.
Why do I see flushes more often than 1 in 505?
Because you play more hands than you remember, suited hands are over-represented in what you choose to play, and at a full table someone else may hold one.
Is a flush rarer than a straight?
Yes in five-card poker — a straight is about 0.392% — which is why a flush outranks it.
Garden Area Calculator and other Everyday tools
Garden Area Calculator · Walking Steps Tracker · Grocery Budget Planner · Compound Savings Growth · Day of Week Calculator · Jet Lag Recovery Calculator · Everyday Guides