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).