Pot Odds Calculator
Calculate pot odds as a percentage and ratio in Texas Hold'em.
Compare pot odds to your hand equity or outs to decide whether a call is mathematically correct.
What pot odds actually are
Pot odds are the price the pot is laying you to call. If $40 is in the middle and you have to call $10, you are paying $10 to win $50 — a 5-to-1 price. The break-even equity for that call is 10 ÷ 50 = 20%. Any hand with at least 20% chance to win the pot is a +EV call.
The percentage form is more useful in practice than the ratio:
pot_odds_percent = call_amount ÷ (pot + call_amount) × 100
That single number tells you the minimum equity your hand needs. Hand equity above pot odds equity = profitable call. Below = fold (unless implied odds bail you out).
The rule of 2 and 4 — fast equity math at the table
You will not run pot odds calculators while at a casino table. Use Phil Gordon’s shortcut for drawing hands:
- On the flop with one card to come: outs × 2 ≈ equity percent
- On the flop with two cards to come (no further bets): outs × 4 ≈ equity percent
- On the turn waiting for the river: outs × 2 ≈ equity percent
Open-ended straight draw: 8 outs. Flop to turn equity ≈ 16%, flop to river ≈ 32%. Flush draw: 9 outs. Turn equity ≈ 18%, river equity ≈ 36%. Gutshot: 4 outs ≈ 8% per card.
Common bet sizes and the equity they demand
| Bet (as fraction of pot) | Equity needed to call |
|---|---|
| 1/3 pot | 20% |
| 1/2 pot | 25% |
| 2/3 pot | 28.6% |
| 3/4 pot | 30% |
| Pot | 33.3% |
| 1.5x pot | 37.5% |
| 2x pot (overbet) | 40% |
The jump from half-pot to pot-sized doubles the bet but only adds 8 percentage points to the equity hurdle. That is one reason half-pot bets are so common — they get folds without committing the bettor.
The biggest beginner mistake
Calling because “the pot is so big I can’t fold.” If your hand has 10% equity and pot odds demand 30%, the size of the pot is irrelevant — every dollar you call is losing 20 cents on average. The size of the pot affects implied odds (winning is bigger), not pot odds (the math of this specific decision).
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
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