Pot Odds in Poker: Formula, Chart and Free Calculator
By the PokerClimb team · Reviewed by Agustin Policano · Updated · 9 min read
Pot odds compare the size of the pot to the cost of a call. To use them, divide your call by the final pot: facing a half-pot bet you need 25% equity, facing a pot-sized bet you need 33%. If your hand wins more often than that, the call makes money in the long run.
Pot odds are the first piece of poker math every player should learn, because they answer the question you face most often: is this call worth it? You do not need to be good at math. One division, or one row of the chart below, is enough to stop making the most expensive calls in your game.
Pot odds calculator
Enter the pot before your opponent bet, and the bet you are facing.
Not enough on direct odds: you hit 19.1% and need 25.0%. You need implied odds, or a fold.
The pot odds formula
The easiest version gives you the equity you need directly, as a percentage:
Walk through it once and it sticks:
- The pot is 100. Your opponent bets 50. The pot is now 150.
- You have to call 50. If you call, the final pot is 200.
- You are paying 50 to win a 200 pot, so you need to win 50 ÷ 200 = 25% of the time.
The same price as a ratio is 3 to 1: there is 150 in the pot and 50 to call. Ratios are how older books talk about pot odds; percentages are easier to compare with equity.
Pot odds chart by bet size
Bets come in a handful of familiar sizes, so you can memorize the price of each instead of calculating it at the table.
| Bet size | Pot odds | Equity needed to call | Defend at least (MDF) |
|---|---|---|---|
| 1/4 pot | 5 : 1 | 16.7% | 80.0% |
| 1/3 pot | 4 : 1 | 20.0% | 75.0% |
| 1/2 pot | 3 : 1 | 25.0% | 66.7% |
| 2/3 pot | 2.5 : 1 | 28.6% | 60.0% |
| 3/4 pot | 2.3 : 1 | 30.0% | 57.1% |
| Pot | 2 : 1 | 33.3% | 50.0% |
| 1.5x pot | 1.7 : 1 | 37.5% | 40.0% |
| 2x pot | 1.5 : 1 | 40.0% | 33.3% |
Bigger bets demand more equity, but even a pot-sized bet only asks you to win one time in three. That is why strong draws can often call large bets, and why folding too often against small bets is such a costly leak.
Outs and the rule of 2 and 4
To compare pot odds with your equity, you need to know how often you improve. An out is a card that improves your hand to one that should win. A flush draw has 9 outs: 13 cards of the suit, minus the 4 you can see.
| Draw | Outs | Flop to turn | Turn to river | Flop to river |
|---|---|---|---|---|
| Flush draw + open-ended | 15 | 31.9% | 32.6% | 54.1% |
| Flush draw | 9 | 19.1% | 19.6% | 35.0% |
| Open-ended straight draw | 8 | 17.0% | 17.4% | 31.5% |
| Two overcards | 6 | 12.8% | 13.0% | 24.1% |
| Pair to two pair or trips | 5 | 10.6% | 10.9% | 20.4% |
| Gutshot | 4 | 8.5% | 8.7% | 16.5% |
At the table, use the rule of 2 and 4: multiply your outs by 2 for one card, or by 4 for two cards. Nine outs gives about 18% and 36%, close enough to the real 19.6% and 35%.
Implied odds and reverse implied odds
Implied odds include the money you expect to win after you hit. In the example above you call 50 and hit 19.6% of the time. To break even you need to win about 255 on average when you hit (50 ÷ 0.196), and the pot will be 200, so you need to win roughly 55 more on the river when the flush comes in. Against an opponent with a big stack who pays off, that is realistic (the stack-to-pot ratio tells you how much is left to win). Against one who will fold every time the third suited card lands, it is not.
Reverse implied odds are the opposite: hands that look like they have outs but often make a second-best hand. Drawing to a low flush, or to a straight that puts four to a flush on the board, can cost you more when you “hit” than when you miss.
Pot odds from the bettor’s side: MDF
Pot odds also tell the bettor something. A bluff of half the pot risks 50 to win 100, so it profits if the opponent folds more than 33% of the time. Flip that around and you get the minimum defense frequency (MDF): the share of your range you need to continue with so that your opponent’s bluffs do not automatically profit.
Against a half-pot bet, MDF is 100 ÷ 150 = 66.7%. It is a guide, not a rule: against players who rarely bluff you can fold more, and solver strategies sometimes defend slightly less on boards that favor the bettor. But if you fold most of your range to a small c-bet, you are giving away money. This balance between betting and calling is the core idea behind GTO poker.
Frequently asked questions
How do you calculate pot odds?
Divide the amount you have to call by the total pot after your call. Facing a 50 bet into a 100 pot, you call 50 to win a final pot of 200, so you need 50 / 200 = 25% equity to break even.
What is the difference between pot odds and equity?
Pot odds are the price you are being offered: the share of the final pot you are paying. Equity is your share of the pot based on how often your hand wins. Call when your equity is higher than the equity the pot odds require.
What are good pot odds?
Odds are good when they ask for less equity than your hand has. A half-pot bet asks for 25%, a pot-sized bet for 33%. A flush draw with one card to come has about 19.6%, so it needs a smaller bet or implied odds to call.
What is the rule of 2 and 4?
Multiply your outs by 2 to estimate your chance of hitting on the next card, or by 4 for two cards (flop to river, only when you will see both cards). Nine outs is about 18% for one card and 36% for two.
Are pot odds the same as implied odds?
No. Pot odds only count the money already in the pot. Implied odds also count the money you expect to win on later streets when you hit, which is why some draws are profitable calls even with poor direct odds.
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