Poker Odds Calculator
Turn your number of outs into the chance of completing a hand by the turn and river, with the odds against and the popular rule-of-2-and-4 shortcut. Calculates in your browser.
Chance to hit by the river
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Show the math
Exact two-card odds use the chance of missing both streets, subtracted from one:
P(hit) = 1 − (unseen−outs)/unseen × (unseen−1−outs)/(unseen−1)
The popular shortcut: multiply outs by 2 for one card to come, or by 4 for two.
Estimates for a single drawing hand, please play responsibly. All math runs locally in your browser.
What this does
A poker odds calculator turns your number of outs into the chance of completing a hand by the turn and river, with the odds against and the rule-of-2-and-4 shortcut.
How to use it
- Count your outs.
- Choose one card or two to come.
- Read the completion chance.
- Compare against the pot odds.
How it works
Outs are the unseen cards that complete your hand. These are estimates for a single drawing hand — please play responsibly.
rule of 2 and 4: outs × 2 (one card) or × 4 (two)
Understanding your result
Counting your outs (the unseen cards that complete your hand) is the skill; the rule of 2 and 4 then turns them into a quick percentage, roughly times 2 per card to come, times 4 with two. Compare that chance to the pot odds you are being offered to decide whether a call pays off long term. These are estimates for one drawing hand, so please play responsibly.
Example
Nine flush outs give roughly a 35% chance by the river.
Sources & methodology
Last updated .
Frequently asked questions
What are outs?
Outs are the unseen cards that complete your hand, a flush draw has nine outs, an open-ended straight draw has eight.
What is the rule of 2 and 4?
A quick estimate: multiply your outs by two for one card to come, or by four for two cards.
Is my data kept?
No. These are estimates for a single drawing hand, computed locally in your browser. Please play responsibly.
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