Pot Odds Calculator
Should you call this bet? Three questions, then the answer in plain words, and why.
Example filled in: a flush draw facing a half-pot bet. Change anything.
Step 1: What is in the pot, and what do you have to call?
Chips, dollars or big blinds: the units cancel out.
Step 2: Flop or turn?
Step 3: What are you hoping to hit?
A call needs to win 25 times in 100. Your flush draw comes 19 times in 100 on the next card.
- Hit: 19
- Short of the price: 6
- Miss
Exact · 9 outs among 47 unseen cards
Why
9 of the 47 cards you can't see make your hand, so you hit 19.1% of the time on the next card. You call 5 to win the 15 in the middle, so you need to win 1 time in 4: 25.0%. Short of the price, so each call loses about 1.17 on average.
By the river: 35.0%, and when it counts
- The 25 the price needs
- 10 more than it needs
- Miss
That only holds when nobody bets again on the turn. Usually someone does, so the next-card figure is the one to call on.
What EV means here
−1.17 is the average result of calling, over the next card, in the pot's units, counting only the 15 in the middle now. Money you might win later when you hit (implied odds) is not in it.
The rule of 2 and 4 against the exact odds
| Quick estimate | Rule | Exact |
|---|---|---|
| One card: 9 × 2.17 | 19.5% | 19.1% |
| Two cards: 9 × 4.3 | 38.7% | 35.0% |
A quick estimate is close for small draws and drifts high as the outs grow: the two-card figure counts every out twice, but you only need to hit once. The two-card exact figure is from the flop.
Common draws, exact from the flop
| Draw | Outs | Next card | By river |
|---|---|---|---|
| Flush draw | 9 | 19.1% | 35.0% |
| Open-ended straight | 8 | 17.0% | 31.5% |
| Two overcards | 6 | 12.8% | 24.1% |
| Gutshot | 4 | 8.5% | 16.5% |
| Pocket pair to a set | 2 | 4.3% | 8.4% |
| One overcard | 3 | 6.4% | 12.5% |
Price by bet size
| Bet | A call needs |
|---|---|
| A third of the pot | 20.0% |
| Half the pot | 25.0% |
| Two-thirds of the pot | 28.6% |
| Three-quarters of the pot | 30.0% |
| Pot | 33.3% |
| One and a half times the pot | 37.5% |
| Twice the pot | 40.0% |
Half the pot needs 25.0%, a pot-sized bet 33.3%, twice the pot 40.0%. Those three anchor everything in between.
How pot odds work
Pot odds are the price of the call as the share of the time it must win: your call divided by the pot after you call. Calling 5 into 10 makes the pot 20, so you need 5 ÷ 20 = 25.0%.
Then compare that with your chance of winning. Call when it is at least the price; fold when it is less. With a draw, your chance is the chance of hitting one of your outs. The exact chance counts the cards you cannot see: on the flop there are 47 (52 less your two and the three on the board), on the turn 46.
Before you fold a close one
Pot odds count only what is in the middle now. With deep stacks and a disguised draw you win more when you hit (implied odds); drawing to a hand that can still lose to a better one costs you more when you hit (reverse implied odds).
Pot odds, explained from the ground up
Pot odds is the single most important math in poker. Get it right and most call/fold decisions become automatic. This section covers the formula, the shortcuts, the most common bet sizings, and the spots where pot odds alone gives you the wrong answer.
What pot odds actually are
Pot odds = the price you're paying to stay in the hand, expressed as the percentage equity you need to break even on the call. That's it.
When opponent bets, you have two options: fold (lose 0) or call (lose the call, win the pot if your hand is best). The math: if you call $X to win a pot of $Y, you need to win at least X / (X + Y) of the time to break even. Win more often → +EV call. Win less → −EV.
Pot odds is just the cost-of-call expressed as a threshold. Compare it against your hand equity (your actual % chance to win): call if equity ≥ pot odds.
The formula (and the 30-second mental shortcut)
Formula:
Or in plain English: your call divided by the final pot if you call.
Worked example:
- • Pot is $30. Opponent bets $10.
- • To call, you put in $10. The pot becomes $30 + $10 + $10 = $50.
- • Pot odds = $10 / $50 = 20%.
- • You need 20% equity to break even.
30-second mental shortcut: add the bet to the pot mentally first, then divide your call by that. With practice, you'll read pot odds at a glance from any bet sizing.
Common bet sizings → required equity
Memorize these. They cover 95% of the bet sizings you'll face:
| Bet size (% of pot) | Pot odds | Required equity |
|---|---|---|
| 1/3 pot | 1 : 4 | 20% |
| 1/2 pot | 1 : 3 | 25% |
| 2/3 pot | 1 : 2.5 | 28.6% |
| 3/4 pot | 1 : 2.33 | 30% |
| Pot-sized | 1 : 2 | 33.3% |
| 1.5x overbet | 1 : 1.67 | 37.5% |
| 2x overbet | 1 : 1.5 | 40% |
| 3x overbet (rare) | 1 : 1.33 | 42.9% |
| All-in for stack | varies | depends |
Memory anchors:
- • Half pot = 25%
- • Pot-sized = 33%
- • 2x overbet = 40%
Most bets fall between half-pot and pot-sized. If you remember just those two numbers (25% and 33%), you can interpolate everything else.
Pot odds vs hand equity (the call/fold rule)
The whole game in one rule: Call if equity ≥ pot odds. Fold if equity < pot odds.
Pot odds tells you the price; equity tells you what you have. Compare them.
Use the rule of 2 and 4 to estimate equity at the table:
- • Flop with 2 cards to come: outs × 4 ≈ % equity
- • Turn with 1 card to come: outs × 2 ≈ % equity
Example: opponent bets pot. Pot odds = 33%. You have a flush draw on the flop = 9 outs × 4 = 36% equity. 36% ≥ 33% → call. Profitable by 3 percentage points.
Read our rule of 2 and 4 article or use our odds chart for exact equity numbers.
Implied odds (when stacks are deep)
Pure pot odds only counts the chips currently in the pot. But when you HIT your draw, you usually win extra bets on later streets. That's implied odds: the EV from future bets you'll extract.
Implied odds matter most when:
- → Stacks are deep (100bb+). Lots of room to extract postflop.
- → Your draw is well-disguised (gutshot, set-mining). Opponent doesn't see it coming.
- → Opponent is sticky (calling station, big-stack maniac). They'll pay you off.
Set-mining is the classic example. With pocket pair, you're 1-in-8.5 to flop a set (~12%). Pure pot odds rarely justify calling a 3-bet preflop with 22-77. But if you have 100bb stacks and a sticky opponent, implied odds (the chips you'll win when you hit) make it profitable.
Rule of thumb: add 5-15% effective equity for implied odds in deep-stacked spots with disguised draws.
Reverse implied odds (when hitting loses you money)
Sometimes hitting your draw COSTS you more than missing. The classic example: a non-nut flush draw on a board where a higher flush is plausible. You hit your flush and lose to the opponent's nut flush, paying off their value bets.
When reverse implied odds matter:
- → Non-nut flush draws on action-heavy boards. Hitting often means losing a stack.
- → Bottom of straight draws (small straight when bigger straight is possible).
- → Small overpair facing aggression. You think you're ahead; you're drawing dead to a bigger pair.
Rule of thumb: subtract 5-10% effective equity in spots where you're drawing to a non-nut hand against a strong opponent.
Worked scenarios
Scenario 1: Standard flush draw call
Pot $40, opponent bets $20. You have a flush draw (9 outs).
- Pot odds: $20 / $80 = 25%
- Your equity: 9 × 4 = 36%
- Verdict: Clear call. 11 percentage points of EV.
Scenario 2: Gutshot vs overbet (clear fold)
Pot $30, opponent overbets $50 (1.5x pot). You have a gutshot (4 outs).
- Pot odds: $50 / $130 = 38.5%
- Your equity: 4 × 4 = 16%
- Verdict: Fold. Even with implied odds, you're not getting close to the price.
Scenario 3: Set-mining (implied odds save the call)
Cutoff opens to 3bb. You have 5♠5♣ on the BTN. Effective stack: 100bb.
- Pot odds for flatting: 3 / 7.5 = 40%
- Your equity vs cutoff opening range: ~38% (close)
- Implied odds: when you flop a set (~12%), you can win an additional 50-90bb. Adds ~5-7% effective equity.
- Verdict: Call. Implied odds turn a borderline pure-equity decision into a profitable one.
Scenario 4: Reverse implied odds bites
You have 8♠9♠ on a board of A♠T♠4♣ (flush draw). Opponent bets pot on the flop.
- Pot odds: 33%
- Raw equity: 9 outs × 4 = 36%
- Reverse implied odds: if you hit a 9-high flush, the A♠ being on the board means a higher flush is plausible. Discount equity by ~5%.
- Adjusted equity: ~31%, below the 33% threshold.
- Verdict: Marginal call/fold. If opponent is tight and likely has top pair AND a higher draw, lean fold.
Frequently asked questions
What's the difference between pot odds and equity?›
Pot odds is the THRESHOLD: what equity you need to break even on the call. Equity is what your hand actually has. Compare them: if equity ≥ pot odds, calling is +EV. Pot odds describe the price; equity describes the hand strength.
How do I calculate pot odds quickly at the table?›
Use the shortcut: bet ÷ (pot + bet + your call). For common sizings, memorize: half-pot = 25% required, pot-sized = 33%, 2x overbet = 40%. Most decisions you'll face fall in this range.
Is the rule of 2 and 4 accurate enough?›
Yes for typical 4-12 out draws: accurate within ~2% of true equity. For huge draws (15+ outs), it slightly overestimates. For real-time decision-making at the table, the rule is plenty precise.
When should I add implied odds?›
When stacks are deep (100bb+), your draw is well-disguised (set-mining, gutshot), and opponent is sticky enough to pay you off when you hit. Add 5-15% effective equity. With short stacks or face-up draws, implied odds are minimal.
When do reverse implied odds matter?›
When you're drawing to a non-nut hand. Examples: small flush on a paired board, small straight when a bigger one is plausible, small overpair facing big-stack aggression. Subtract 5-10% effective equity in these spots.
What's the easiest way to learn pot odds?›
Memorize three numbers: half-pot = 25%, pot-sized = 33%, 2x overbet = 40%. Then practice with the calculator above: enter different bet sizes and see how the required equity changes. Within a week of practice, you'll read pot odds at a glance.
Can pot odds be negative?›
No, pot odds are always between 0% and 50% (you need at least some equity to call). What CAN be negative is your EV. If your equity is below the pot odds threshold, calling has negative expected value (you lose money long-term).
Does pot odds work in tournaments and cash games?›
The math is identical in both. The application differs slightly because tournament chips have varying dollar value via ICM near pay jumps. In cash games, every chip is worth its face value, so pot odds are gospel. In tournaments, fold tighter than pot odds dictate near bubbles or final tables.
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