Pot odds: how to calculate them fast
Pot odds, explained in plain poker math: every call has a price and every draw has a chance. Learning how to calculate pot odds and equity turns both into one number, so choosing to call or fold stops being a guess. Practice live on the pot odds calculator.
Price versus chance
Pot odds answer one question: is the pot paying me enough to call? You compare the price of the call to the size of the pot you would win, then check that against your chance of actually winning the hand. If your chance beats the price, calling makes money over time even when this particular hand misses.
The one formula
Equity needed = call / (pot + call). Say the pot is $80, your opponent bets $20 (pot now $100), and it costs you $20 to call. Your break-even equity is 20 / (100 + 20) = 20/120 ≈ 16.7%. If your real chance to win is higher than that, you call; if it is lower, you fold.
Pot odds & outs calculator
The single most useful piece of poker maths. Set the pot, what you must call, and how many outs you hold — and see instantly whether the call is +EV.
- Pot odds
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- Rule of 4 / 2
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- If you call, you risk
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- to win
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Two cards to come assumes the money is all-in now. Facing a bet on a single street, use one card — you'll have to pay again to see the river.
Counting your equity
To compare, you need your chance of winning — estimate it with the rule of 4 and 2 (its own lesson shows why it works): multiply outs by 4 with two cards to come, by 2 with one. Draws sit on a scale. A lone 4-out gutshot is only about 16% by the river and 8% for the next card, while the open-ender below reaches roughly 32%.
When implied odds save the call
Sometimes your equity falls just short of the price, yet calling is still right because of implied odds — the extra chips you expect to win on later streets if you hit. A hidden draw against a big stack can be worth chasing. The mirror image is reverse implied odds: the money you lose when you complete a weak second-best hand, which argues for folding instead.
- Equity needed to call = call / (pot + call). Beat that number and calling profits over the long run.
- Turn bet size into a price fast: a half-pot bet is risking 1 to win 3, so you need about 25% equity — bigger bets demand more, smaller bets less.
- Estimate your equity fast with the rule of 4 and 2: outs x4 with two cards to come, outs x2 with one card left.
- When raw pot odds fall short, implied odds (future bets you can win) can still justify the call — but only if the extra money is realistically there.
Test yourself
Answer them all — 18/22 to pass. Every answer gets an explanation.
What do pot odds compare?
Pot odds weigh what the call costs against how likely you are to win the pot.
What is the formula for the equity you need to call?
Break-even equity equals the call divided by the total pot after you call.
Your opponent bets the size of the pot. Roughly what equity do you need to break even?
A pot-size bet always requires about 33% equity to call profitably.
How much equity does a half-pot bet require to break even?
A half-pot bet costs you 25% of the final pot, so you need 25% equity.
A nine-out flush draw on the flop has roughly what chance of hitting by the river?
Nine outs times four (two cards to come) is about 36%.
With one card to come, a nine-out flush draw hits about how often?
With one card left, multiply outs by two: 9 x 2 is about 18%.
How many outs does an open-ended straight draw have?
Two ranks on each end give eight cards that complete the straight.
How many outs does a gutshot (inside) straight draw have?
Only one rank fills the gap, and there are four of that card.
Under the rule of 4 and 2, what do you do with two cards still to come?
With two cards to come, outs times four estimates your equity.
With only the river to come, how do you estimate equity?
One card left means outs times two.
The pot is $80, your opponent bets $20, and it costs $20 to call. What equity do you need?
20 / (100 + 20) = 20/120, which is about 16.7%.
On pure pot odds, when should you call?
Call when your winning chance clears the price the pot is charging.
What do implied odds refer to?
Implied odds are the future bets you expect to collect when your draw gets there.
What are reverse implied odds?
Reverse implied odds are the chips you bleed off when your made hand is still beaten.
You need 25% equity and hold a flush draw worth about 36%. Call or fold?
36% comfortably beats the 25% price, so calling is profitable.
You need 40% equity but hold a gutshot worth about 16%. Call or fold?
16% is far below the 40% required, so on pot odds alone you fold.
The pot is $100 and your opponent bets $50. What equity do you need to call?
50 / (150 + 50) = 50/200 = 25%, the standard half-pot number.
An overbet of twice the pot requires roughly what equity to call?
200 / (300 + 200) = 200/500 = 40% for a 2x-pot overbet.
Which factor can justify a call when raw pot odds fall a little short?
Future bets you can win — implied odds — can make a marginal call correct.
How many outs do two clean overcards give you against one pair?
Three cards for each overcard makes six outs to pair up.
An open-ended straight draw hits by the river about how often?
Eight outs times four (two cards to come) is about 32%.
A quarter-pot bet requires roughly what equity to call?
25 / (125 + 25) = 25/150, about 16.7%, so a small bet is cheap to call.
Review — all 22 questions & answers tap to expand
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What do pot odds compare?
Answer The price of a call to your chance of winning
Pot odds weigh what the call costs against how likely you are to win the pot.
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What is the formula for the equity you need to call?
Answer call / (pot + call)
Break-even equity equals the call divided by the total pot after you call.
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Your opponent bets the size of the pot. Roughly what equity do you need to break even?
Answer About 33%
A pot-size bet always requires about 33% equity to call profitably.
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How much equity does a half-pot bet require to break even?
Answer About 25%
A half-pot bet costs you 25% of the final pot, so you need 25% equity.
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A nine-out flush draw on the flop has roughly what chance of hitting by the river?
Answer About 36%
Nine outs times four (two cards to come) is about 36%.
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With one card to come, a nine-out flush draw hits about how often?
Answer About 18%
With one card left, multiply outs by two: 9 x 2 is about 18%.
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How many outs does an open-ended straight draw have?
Answer 8
Two ranks on each end give eight cards that complete the straight.
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How many outs does a gutshot (inside) straight draw have?
Answer 4
Only one rank fills the gap, and there are four of that card.
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Under the rule of 4 and 2, what do you do with two cards still to come?
Answer Multiply your outs by 4
With two cards to come, outs times four estimates your equity.
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With only the river to come, how do you estimate equity?
Answer Multiply your outs by 2
One card left means outs times two.
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The pot is $80, your opponent bets $20, and it costs $20 to call. What equity do you need?
Answer About 16.7%
20 / (100 + 20) = 20/120, which is about 16.7%.
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On pure pot odds, when should you call?
Answer When your equity is above the break-even percentage
Call when your winning chance clears the price the pot is charging.
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What do implied odds refer to?
Answer The extra chips you can win on later streets if you hit
Implied odds are the future bets you expect to collect when your draw gets there.
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What are reverse implied odds?
Answer Money you lose on later streets when you make a second-best hand
Reverse implied odds are the chips you bleed off when your made hand is still beaten.
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You need 25% equity and hold a flush draw worth about 36%. Call or fold?
Answer Call
36% comfortably beats the 25% price, so calling is profitable.
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You need 40% equity but hold a gutshot worth about 16%. Call or fold?
Answer Fold
16% is far below the 40% required, so on pot odds alone you fold.
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The pot is $100 and your opponent bets $50. What equity do you need to call?
Answer About 25%
50 / (150 + 50) = 50/200 = 25%, the standard half-pot number.
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An overbet of twice the pot requires roughly what equity to call?
Answer About 40%
200 / (300 + 200) = 200/500 = 40% for a 2x-pot overbet.
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Which factor can justify a call when raw pot odds fall a little short?
Answer Good implied odds
Future bets you can win — implied odds — can make a marginal call correct.
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How many outs do two clean overcards give you against one pair?
Answer 6
Three cards for each overcard makes six outs to pair up.
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An open-ended straight draw hits by the river about how often?
Answer About 32%
Eight outs times four (two cards to come) is about 32%.
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A quarter-pot bet requires roughly what equity to call?
Answer About 17%
25 / (125 + 25) = 25/150, about 16.7%, so a small bet is cheap to call.