--- title: "A4s vs JTs: preflop equity" url: "https://georgelipoker.com/equity/a4s-vs-jts.md" canonical_url: "https://georgelipoker.com/equity/a4s-vs-jts" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, A4s or JTs? A4s leads 54.48% to 45.52% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a4s-vs-a2s.md", "https://georgelipoker.com/equity/a4s-vs-qto.md", "https://georgelipoker.com/equity/a3s-vs-jts.md"] --- # A4s vs JTs: preflop equity Who is ahead, A4s or JTs? A4s leads 54.48% to 45.52% before the flop, counted exactly over every board, with the split by flop type and suit. If A4s and JTs get all the chips in before the flop, A4s owns 54.48% of the pot in the long run and JTs owns 45.52%. ## A4s against JTs: the numbers **Exact preflop results for A4s against JTs, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | A4s | 54.230 | 0.506 | 45.264 | 54.483 | | JTs | 45.264 | 0.506 | 54.230 | 45.517 | Both hands are suited hands: A4s and JTs. With no overlap in ranks, every card that pairs one hand is a card that does not pair the other. With only 8.96 points between them, the board decides this matchup far more than the cards in hand. Split pots make up 0.51% of the boards, and both equity figures count them as half a win each. In the ranking of all 169 starting hands, A4s is number 35 and JTs is number 45. **Boards behind the percentages: 27,396,864 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | A4s | 14,857,000 | 139,000 | 12,401,000 | | JTs | 12,401,000 | 139,000 | 14,857,000 | The total is exact: 16 specific deals times 1,712,304 boards. The three counts are approximate, worked out from the percentages to five decimals and rounded to the nearest thousand. **A4s against JTs read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | A4s | 1.197 | 1.844 | 2.209 | 0.835 | | JTs | 0.835 | 2.209 | 1.844 | 1.197 | The last column is the smallest pot odds, written as a pot-to-call ratio, at which a call breaks even with this equity. ## Who is ahead on which flops Across the five flop textures A4s' equity moves by 19.43 points, from 48.93% on rainbow flops topped by a ten or better to 68.36% on low rainbow flops (nine high or lower). The lead reverses on rainbow flops topped by a ten or better: there JTs is the favorite even though A4s is ahead overall. **A4s against JTs by flop texture, in percent** | Flop | Share of flops | A4s wins | Ties | JTs wins | A4s equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.867 | 48.852 | 0.156 | 50.992 | 48.930 | | Rainbow, nine or lower | 7.042 | 67.979 | 0.754 | 31.267 | 68.356 | | Two-tone | 46.727 | 53.097 | 0.267 | 46.636 | 53.231 | | Monotone | 5.273 | 50.843 | 3.429 | 45.728 | 52.558 | | Paired | 17.091 | 60.215 | 0.645 | 39.140 | 60.537 | A rainbow flop shows three suits, a two-tone flop repeats one suit, a monotone flop is a single suit, and a paired flop repeats a rank. ## Compared with a random hand Start from the random-hand figures, 59.03% for A4s and 57.53% for JTs. This opponent changes them by -4.55 and -12.01 points. **A4s and JTs here compared with each against a random hand, in percent** | Case | Equity here | Against a random hand | Change in points | Times the random-hand equity | | --- | --- | --- | --- | --- | | A4s, all flops | 54.483 | 59.034 | -4.551 | 0.92291 | | A4s, rainbow, ten or higher | 48.930 | 59.034 | -10.104 | 0.82884 | | A4s, rainbow, nine or lower | 68.356 | 59.034 | +9.322 | 1.15791 | | A4s, two-tone | 53.231 | 59.034 | -5.803 | 0.90170 | | A4s, monotone | 52.558 | 59.034 | -6.476 | 0.89030 | | A4s, paired | 60.537 | 59.034 | +1.503 | 1.02546 | | JTs, all flops | 45.517 | 57.528 | -12.011 | 0.79121 | | JTs, rainbow, ten or higher | 51.070 | 57.528 | -6.458 | 0.88774 | | JTs, rainbow, nine or lower | 31.644 | 57.528 | -25.884 | 0.55006 | | JTs, two-tone | 46.769 | 57.528 | -10.759 | 0.81298 | | JTs, monotone | 47.442 | 57.528 | -10.086 | 0.82468 | | JTs, paired | 39.463 | 57.528 | -18.065 | 0.68598 | ## Does a shared suit matter? Does suit overlap move the numbers? A4s has 56.07% when the hands share a suit and 53.95% when they do not. A4s does better with a shared suit, by 2.12 points. **A4s against JTs by suit overlap, in percent** | Deals | Specific deals | Share of deals | A4s wins | Ties | JTs wins | A4s equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 4 | 25.00 | 55.777 | 0.587 | 43.636 | 56.071 | | No shared suit | 12 | 75.00 | 53.714 | 0.479 | 45.807 | 53.953 | ## How often this matchup comes up How often does it happen? 16 of the 1,624,350 ordered deals (0.0010%) are A4s against JTs, and 32 (0.0020%) if either hand may sit in either seat. ## A worked example A $100 all-in from each player makes a $200 pot, and the exact equity says A4s gets $108.96 of it on average and JTs gets $91.04. A thousand deals look like this: A4s takes 542, JTs takes 453, 5 are ties. ## The same matchup from the other side If you came looking for JTs against A4s, the numbers are the same with the hands swapped: 45.52% and 54.48%. ## Keep exploring Open the calculator with As4s against JhTh already entered, a deal with no shared suit, and change any card to try your own hand. The matchups after it each swap one hand for a nearby one in the ranking. - [Open As4s against JhTh in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As4s&p2=JhTh) - [A4s combos](https://georgelipoker.com/combos/a4s.md) - [JTs combos](https://georgelipoker.com/combos/jts.md) - [A4s vs A2s](https://georgelipoker.com/equity/a4s-vs-a2s.md) - [A4s vs QTo](https://georgelipoker.com/equity/a4s-vs-qto.md) - [A3s vs JTs](https://georgelipoker.com/equity/a3s-vs-jts.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed The figures are counted, not estimated: 1,712,304 boards for every suit pattern of the 16 specific deals, with both seven-card hands compared each time. Equity gives half a win for a tie. For the flop rows, a board is counted once under each of the ten flops inside it. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A4s vs A2s: preflop equity](https://georgelipoker.com/equity/a4s-vs-a2s.md) - [A4s vs QTo: preflop equity](https://georgelipoker.com/equity/a4s-vs-qto.md) - [A3s vs JTs: preflop equity](https://georgelipoker.com/equity/a3s-vs-jts.md)