--- title: "Call or Fold: 20 Outs vs 2/3 pot, Flop" url: "https://georgelipoker.com/call-or-fold/20-outs-flop-vs-two-thirds-pot.md" canonical_url: "https://georgelipoker.com/call-or-fold/20-outs-flop-vs-two-thirds-pot" last_updated: "2026-10-21" type: "reference" summary: "A two-thirds-pot bet asks for 28.57% and 20 outs on the flop give 67.53%, a margin of +38.96 points and a call." related: ["https://georgelipoker.com/call-or-fold.md"] --- # Call or Fold: 20 Outs vs 2/3 pot, Flop A two-thirds-pot bet asks for 28.57% and 20 outs on the flop give 67.53%, a margin of +38.96 points and a call. The numbers favor a call. 20 outs on the flop reach 67.53%, and a two-thirds-pot bet asks only for 28.57%. - Verdict: Call (20 outs, flop, two-thirds-pot bet) - Chance to hit by the river: 67.53% (two cards to come) - Equity the call needs: 28.57% ($66.67 into a pot of $233.33) - Margin over the price: +38.96 points (your chance minus the price) ## What the numbers say Pay the two-thirds-pot bet and you get a better deal than the draw needs. You need 28.57%, you have 67.53%, and the 38.96-point difference is large. Think of 20 outs as a running total of every card that improves you. 20 of the 47 unseen cards qualify, which is 42.55% on one card. ## Worked through on a $100 pot - Pot when the bet arrives: $100 - Your opponent bets: $66.67 - Your call: $66.67 - Pot with your call in: $233.33 - What a hit wins: $166.67 - You lose on a miss: $66.67 - How often you hit: 67.53% - Expected value of a call: +$90.90 - Equity needed to break even: 28.57% - Margin, to four decimals: +38.9586 points - Fractional outs at the price: 7.20 outs - Margin measured in outs: +12.80 outs Stay with simple rules: the whole pot on a hit, the call lost on a miss, no more money in. Under them calling gains $90.90 on average. The hit side averages $112.55, the miss side $21.65, and each dollar called returns +1.364. In odds, you face 0.48 : 1 against you and the pot pays 2.5 : 1. The price is 28.57% because your call goes into the pot too. Leave it out and you get 40.00%, a margin of +27.5301 points that does not exist; use the starting pot instead and 66.67% puts the margin at +0.8634 points. ## Reverse implied odds and your margin 8 outs is the line for a two-thirds-pot bet on the flop. Your 20 sit 12 outs above it, and the chance at the line is 31.45%. Price of a two-thirds-pot 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 | 28.57% | +38.96 points | +$90.90 | Call | | $10 | 29.85% | +37.68 points | +$84.15 | Call | | $25 | 32.00% | +35.53 points | +$74.02 | Call | | $50 | 36.36% | +31.17 points | +$57.14 | Call | | $100 | 50.00% | +17.53 points | +$23.37 | Call | After a hit you could give back up to $134.61 on later streets, 2.02 times your call, before the call stops paying. ## Which chance to use 20 outs against a two-thirds-pot bet, one view per row | Cards counted | Chance | Margin over price | Value of the call | Verdict | | --- | --- | --- | --- | --- | | By the river, two cards | 67.53% | +38.9586 points | +$90.90 | Call | | Next card only | 42.55% | +13.9818 points | +$32.62 | Call | You can skip the usual debate over one card versus two, because 42.55% and 67.53% both give a call against 28.57%. ## Nearby draws Draws near yours, on the same street and against the same bet: the price is fixed at 28.57%, and each out moves the chance about 2.50 points. Outs 16 to 20 on the flop against a two-thirds-pot bet | Outs | By the river | Margin | Verdict | | --- | --- | --- | --- | | [16 outs](https://georgelipoker.com/call-or-fold/16-outs-flop-vs-two-thirds-pot.md) | 56.98% | +28.41 points | Call | | [17 outs](https://georgelipoker.com/call-or-fold/17-outs-flop-vs-two-thirds-pot.md) | 59.76% | +31.19 points | Call | | [18 outs](https://georgelipoker.com/call-or-fold/18-outs-flop-vs-two-thirds-pot.md) | 62.44% | +33.87 points | Call | | [19 outs](https://georgelipoker.com/call-or-fold/19-outs-flop-vs-two-thirds-pot.md) | 65.03% | +36.46 points | Call | | 20 outs, this page | 67.53% | +38.96 points | Call | ## Every bet size, one draw Bet size sets the price, so the verdict changes as you scan the table. The two-thirds-pot bet of this page is marked in the first column. 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, this page | 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](https://georgelipoker.com/call-or-fold/20-outs-flop-vs-pot-size.md) | 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 | 20 outs are strong enough to call every size listed. A chance of 67.53% beats even the biggest price in the table. ## Next pages to read - [20 outs on the flop](https://georgelipoker.com/outs/20-outs-flop.md) - [Pot odds for a two-thirds-pot bet](https://georgelipoker.com/pot-odds/two-thirds-pot.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 ### What is the right play with 20 outs when a two-thirds-pot bet comes on the flop? Your chance, 67.53%, set against the 28.57% price gives +38.96 points and a call. With a $100 pot, a $66.67 call and no more betting, the average value of the call is +$90.90. ### What is the fewest outs that can call a two-thirds-pot bet on the flop? You need at least 8 outs against a two-thirds-pot bet on the flop. That count hits 31.45% against 28.57% needed, and 7 falls short at 27.84%. With 20 you are 12 past the minimum. ### One card or two: which number belongs next to the 28.57% price? Both figures are right for their own situation: 67.53% with no more betting, 42.55% when the turn brings a bet. Facing 28.57%, each one gives a call. ## How this is computed The chance to hit is the exact closed form, with no simulation. From the flop, 351 of the 1,081 possible pairs of unseen cards hold no out, so the chance is 1 minus 351 / 1,081, which is 67.53%. What is held fixed: the call equals the bet, so the price is $66.67 / $233.33 = 28.57%; the pot is won whole on a hit; there is no further betting; and each of the 47 unseen cards is as likely as any other. Opponent cards are not removed. 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 two-thirds-pot bet](https://georgelipoker.com/pot-odds/two-thirds-pot.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)