Poker Outs: How to Count Them

Outs are the cards that turn your hand into a winner. Counting them is the first half of every odds decision — once you know your outs, the rule of 4 and 2 converts them into a winning percentage you can compare to the price of a call. Get good at counting outs and the rest of poker math falls into place.

What counts as an out

An out is any unseen card that gives you a hand likely to win. You can see your two hole cards and the community cards; everything else is unknown and could be an out. The skill is identifying which unseen cards actually help — and being honest about which ones leave you behind.

Common draws and their outs

Draw	Outs	How to count
Flush draw	9	13 of your suit − 2 in hand − 2 on board
Open-ended straight	8	Two ranks complete it, four of each
Gutshot straight	4	One rank completes it
Two overcards	6	Three of each overcard left
Pair to trips (set)	2	The two remaining cards of your pair
Flush + straight combo	15	Add them — but subtract any shared card

Turning outs into a percentage

Once you have a clean count, the rule of 4 and 2 gives a quick estimate of how often you’ll hit:

• On the flop (two cards still to come): outs × 4 ≈ % to improve by the river.
• On the turn (one card to come): outs × 2 ≈ % to improve on the river.

So nine flush outs is about 36% on the flop (9 × 4) and 18% on the turn (9 × 2). At high out counts (13+) the ×4 estimate slightly overshoots — shave a few points off — but for everyday decisions it’s close enough.

Worked example: don’t double-count

You hold J♠ 10♠ on a flop of 9♠ 8♦ 2♠. You have two draws at once:

• Flush draw: 9 spades.
• Open-ended straight draw: any Q or 7 completes the straight — that’s 8 cards.

Naively that’s 9 + 8 = 17. But two of those cards — the Q♠ and 7♠ — appear in both lists. Subtract the overlap: 17 − 2 = 15 outs. That’s a monster combo draw, roughly 54% to hit by the river — you’re actually a slight favorite against many made hands.

Double-counting is the most common out-counting error. Whenever you have two draws, check for cards that serve both and count each card only once.

Tainted outs: the honest discount

Not every “out” is clean. A card that completes your hand but hands someone else a better one is tainted.

Example. You hold 6♥ 5♥ on 7♣ 8♦ K♦. Your open-ended straight draw (any 4 or 9) is 8 outs — but the 4♦ and 9♦ also complete a possible diamond flush for an opponent. Against a likely flush draw, those two outs are tainted: hit them and you may still lose. Count 8 outs in a vacuum, but mentally discount toward ~6 when a flush is out there.

A fuller outs and equity chart

Keep these common numbers in your head and you’ll rarely need to calculate from scratch at the table:

Situation	Outs	Flop → river (≈)	Turn → river (≈)
Pocket pair to a set	2	8%	4%
One overcard	3	12%	7%
Gutshot straight	4	16%	9%
Two pair to full house	4	16%	9%
Pair + overcard	5	20%	11%
Two overcards	6	24%	13%
Open-ended straight	8	31%	17%
Flush draw	9	35%	19%
Flush + gutshot	12	45%	26%
Open-ended + flush	15	54%	33%

(The flop figures are slightly below the raw rule-of-4 numbers because, at high out counts, the ×4 shortcut overstates a little — these are the truer percentages.)

Outs change as streets come

Your out count isn’t fixed for the whole hand — re-evaluate it on every street:

• A card might complete your draw (you’re done counting) or kill it (a scary card pairs the board, threatening a full house over your flush).
• New cards can add outs — a backdoor draw on the flop can pick up real outs on the turn.
• An opponent’s bet can taint outs by representing a hand that beats some of your improvements.

Always recount on the turn before deciding whether the river is worth chasing.

How to use your out count

1. Count clean outs (subtract overlaps, discount tainted ones).
2. Apply the rule of 4 and 2 to get your equity.
3. Compare it to your pot odds — if your chance to win is higher than the price, call.

That three-step loop is the engine of profitable drawing. Drill it until it’s automatic, then explore the rest of the numbers in the poker odds & math hub.