--- title: "Call or Fold: 20 Outs vs full pot, Flop" url: "https://georgelipoker.com/call-or-fold/20-outs-flop-vs-pot-size.md" canonical_url: "https://georgelipoker.com/call-or-fold/20-outs-flop-vs-pot-size" last_updated: "2026-10-21" type: "reference" summary: "67.53% chance against a 33.33% price: 20 outs on the flop facing a pot-size bet is a call." related: ["https://georgelipoker.com/call-or-fold.md"] --- # Call or Fold: 20 Outs vs full pot, Flop 67.53% chance against a 33.33% price: 20 outs on the flop facing a pot-size bet is a call. The numbers favor a call. 20 outs on the flop reach 67.53%, and a pot-size bet asks only for 33.33%. - Verdict: Call (20 outs, flop, pot-size bet) - Chance to hit by the river: 67.53% (two cards to come) - Equity the call needs: 33.33% ($100 into a pot of $300) - Margin over the price: +34.20 points (your chance minus the price) ## Chance against price This is one of the easier spots. 20 outs on the flop reach 67.53% by the river, the pot-size bet asks for just 33.33%, and the 34.20-point margin favors the call. A count of 20 outs is usually the sum of more than one draw. Out of 47 unseen cards, one card helps 42.55% of the time. ## A $100 pot, step by step - Starting pot: $100 - The bet: $100 - Chips you put in: $100 - Pot after your call: $300 - What a hit wins: $200 - You lose on a miss: $100 - Probability of a hit: 67.53% - Expected value of calling: +$102.59 - Equity the call needs: 33.33% - Exact margin over the price: +34.1967 points - Fractional outs at the price: 8.53 outs - Margin measured in outs: +11.47 outs Over many identical spots, with the whole pot won on every hit, the call lost on every miss and no extra betting, calling gains $102.59 on average. Hits bring in $135.06, misses cost $32.47, and the ratio is +1.026 per dollar called. As odds, 0.48 : 1 against hitting meets pot odds of 2 : 1. The correct pot to divide by includes your call. Without it the price reads 50.00% rather than 33.33%, and the margin reads +17.5301 points. ## How much room the call has Count how many outs the call needs: 9 reach the 33.33% price, and you have 20. That leaves 11 outs of slack. Price of a pot-size call if you give money back after a hit, 20 outs on the flop | Given back later | Price with it | Your chance minus price | Value of the call | Call? | | --- | --- | --- | --- | --- | | $0 | 33.33% | +34.20 points | +$102.59 | Call | | $10 | 34.48% | +33.05 points | +$95.84 | Call | | $25 | 36.36% | +31.17 points | +$85.71 | Call | | $50 | 40.00% | +27.53 points | +$68.83 | Call | | $100 | 50.00% | +17.53 points | +$35.06 | Call | Your margin is worth $151.92 in later losses. Past that, 1.52 times your call, folding would have been better. ## Two views of the same draw 20 outs against a pot-size bet, one view per row | Cards counted | Chance | Margin over price | Value of the call | Verdict | | --- | --- | --- | --- | --- | | By the river, two cards | 67.53% | +34.1967 points | +$102.59 | Call | | Next card only | 42.55% | +9.2199 points | +$27.66 | Call | Whether you count one card or two, the answer is a call. The river figure is 67.53%, the next-card figure is 42.55%, and both are measured against 33.33%. ## Counts close to yours Remove a few outs and watch the verdict. Every out is worth about 2.50 points on the flop, and the price stays at 33.33%. Outs 16 to 20 on the flop against a pot-size bet | Outs | By the river | Margin | Verdict | | --- | --- | --- | --- | | [16 outs](https://georgelipoker.com/call-or-fold/16-outs-flop-vs-pot-size.md) | 56.98% | +23.65 points | Call | | [17 outs](https://georgelipoker.com/call-or-fold/17-outs-flop-vs-pot-size.md) | 59.76% | +26.43 points | Call | | [18 outs](https://georgelipoker.com/call-or-fold/18-outs-flop-vs-pot-size.md) | 62.44% | +29.11 points | Call | | [19 outs](https://georgelipoker.com/call-or-fold/19-outs-flop-vs-pot-size.md) | 65.03% | +31.70 points | Call | | 20 outs, this page | 67.53% | +34.20 points | Call | ## How bet size moves the answer How much does bet size matter? The price climbs from 16.67% to 44.44% across the list, while 20 outs stay at 67.53%. 20 outs on the flop against every bet size | Bet size | Equity needed | Margin | Verdict | | --- | --- | --- | --- | | quarter-pot | 16.67% | +50.86 points | Call | | [third-pot](https://georgelipoker.com/call-or-fold/20-outs-flop-vs-third-pot.md) | 20.00% | +47.53 points | Call | | two-fifths-pot | 22.22% | +45.31 points | Call | | [half-pot](https://georgelipoker.com/call-or-fold/20-outs-flop-vs-half-pot.md) | 25.00% | +42.53 points | Call | | [two-thirds-pot](https://georgelipoker.com/call-or-fold/20-outs-flop-vs-two-thirds-pot.md) | 28.57% | +38.96 points | Call | | [three-quarter-pot](https://georgelipoker.com/call-or-fold/20-outs-flop-vs-three-quarter-pot.md) | 30.00% | +37.53 points | Call | | pot-size, this page | 33.33% | +34.20 points | Call | | 1.25x-pot | 35.71% | +31.82 points | Call | | 1.5x-pot | 37.50% | +30.03 points | Call | | 2x-pot | 40.00% | +27.53 points | Call | | 3x-pot | 42.86% | +24.67 points | Call | | 4x-pot | 44.44% | +23.09 points | Call | Nothing in the list is too big to call: 20 outs reach 67.53% on the flop, above every price on the page. ## Keep exploring - [20 outs on the flop](https://georgelipoker.com/outs/20-outs-flop.md) - [Pot odds for a pot-size bet](https://georgelipoker.com/pot-odds/pot-size.md) - [Pot odds calculator](https://georgelipoker.com/tools/pot-odds-calculator.md) - [Outs calculator](https://georgelipoker.com/tools/outs-calculator.md) - [Call or fold with a draw](https://georgelipoker.com/call-or-fold.md) ## Questions ### Should you call a pot-size bet with 20 outs on the flop? Reduce the question to a comparison of two numbers: 67.53% to hit and 33.33% to break even. The first minus the second is +34.20 points, which makes this a call, and the call averages +$102.59 on a $100 pot if no more betting follows. ### What is the minimum number of outs for a pot-size bet on the flop? Look for 9 outs. That is the smallest count whose chance, 34.97%, reaches the 33.33% price; 8 manages 31.45%. You have 20, so you are 11 ahead of the minimum. ### Does it matter whether you count one card or two against a pot-size bet? The river figure of 67.53% assumes no further betting; the next-card figure of 42.55% assumes you pay again on the turn. Against 33.33%, both say call, so you can use either. ## How this is computed No sampling is involved. On the flop there are 1,081 pairs of unseen cards, and 351 of them contain no out, which leaves 67.53% for at least one out. The numbers are a baseline rather than a prediction for one hand. The price is 33.33%, from $100 into $300, and the chance assumes a whole pot won on a hit, no more betting, 47 equally likely unseen cards, and no cards removed for the other player. Computed from the closed form by the GeorgeLiPoker math library. ## Related pages - [20 outs on the flop](https://georgelipoker.com/outs/20-outs-flop.md) - [Pot odds for a pot-size bet](https://georgelipoker.com/pot-odds/pot-size.md) - [Pot odds calculator](https://georgelipoker.com/tools/pot-odds-calculator.md) - [Outs calculator](https://georgelipoker.com/tools/outs-calculator.md) - [Call or fold with a draw](https://georgelipoker.com/call-or-fold.md) ## Related - [Call or Fold With a Draw by Bet Size](https://georgelipoker.com/call-or-fold.md)