---
title: "A8s vs 64s: preflop equity"
url: "https://georgelipoker.com/equity/a8s-vs-64s.md"
canonical_url: "https://georgelipoker.com/equity/a8s-vs-64s"
last_updated: "2026-10-23"
type: "reference"
summary: "A8s is a big favorite over 64s before the flop: 62.68% to 37.32% equity, counted exactly over every board, with the split by flop type and suit."
related: ["https://georgelipoker.com/equity/a8s-vs-53s.md", "https://georgelipoker.com/equity/a8s-vs-43s.md", "https://georgelipoker.com/equity/kts-vs-64s.md"]
---

# A8s vs 64s: preflop equity

A8s is a big favorite over 64s before the flop: 62.68% to 37.32% equity, counted exactly over every board, with the split by flop type and suit.

Dealt all in against each other, A8s takes 62.68% of the pot on average and 64s takes the other 37.32%.

## A8s against 64s: the numbers

**Exact preflop results for A8s against 64s, in percent**

| Hand | Wins | Ties | Loses | Equity |
| --- | --- | --- | --- | --- |
| A8s | 62.425 | 0.515 | 37.060 | 62.683 |
| 64s | 37.060 | 0.515 | 62.425 | 37.317 |

A8s and 64s are both suited hands. The two hands share no rank, which makes this a pure matchup of card strength, straight chances and flush chances.

That is a modest edge, the kind that shows up over many hands and is easy to miss in one. Ties are part of the picture: 0.52% of boards end in a split pot, and each side counts that as half a win.

Place 21 of 169 belongs to A8s and place 138 belongs to 64s in the ranking against a random hand.

**Boards behind the percentages: 27,396,864 counted in all**

| Hand | Boards won, about | Boards tied, about | Boards lost, about |
| --- | --- | --- | --- |
| A8s | 17,102,000 | 141,000 | 10,153,000 |
| 64s | 10,153,000 | 141,000 | 17,102,000 |

Exact total: 16 deals times 1,712,304 boards. The other three counts come from the five-decimal percentages and are rounded to the nearest thousand, so read them as approximate.

**A8s against 64s read as odds**

| Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) |
| --- | --- | --- | --- | --- |
| A8s | 1.680 | 1.602 | 2.698 | 0.595 |
| 64s | 0.595 | 2.698 | 1.602 | 1.680 |

In the last column, a pot-to-call ratio at or above the figure makes a call break even or better at this equity.

## Who is ahead on which flops

If you know the kind of flop that came, the numbers shift: A8s holds 66.56% on rainbow flops topped by a ten or better and 46.08% on low rainbow flops (nine high or lower). 64s takes over on low rainbow flops (nine high or lower), so the favorite before the flop is the underdog on those boards.

**A8s against 64s by flop texture, in percent**

| Flop | Share of flops | A8s wins | Ties | 64s wins | A8s equity |
| --- | --- | --- | --- | --- | --- |
| Rainbow, ten or higher | 25.220 | 66.451 | 0.209 | 33.340 | 66.555 |
| Rainbow, nine or lower | 5.689 | 45.737 | 0.679 | 53.584 | 46.077 |
| Two-tone | 46.727 | 61.741 | 0.268 | 37.991 | 61.875 |
| Monotone | 5.273 | 58.030 | 3.468 | 38.502 | 59.764 |
| Paired | 17.091 | 65.269 | 0.674 | 34.057 | 65.606 |

Read the flop types this way: rainbow has three suits, two-tone has two cards of one suit, monotone has three, and paired repeats a rank.

## Compared with a random hand

Each hand has a baseline against a random hand: 61.94% for A8s, 41.33% for 64s. Here the change is +0.74 and -4.01 points.

**A8s and 64s 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 |
| --- | --- | --- | --- | --- |
| A8s, all flops | 62.683 | 61.944 | +0.739 | 1.01193 |
| A8s, rainbow, ten or higher | 66.555 | 61.944 | +4.611 | 1.07444 |
| A8s, rainbow, nine or lower | 46.077 | 61.944 | -15.867 | 0.74385 |
| A8s, two-tone | 61.875 | 61.944 | -0.069 | 0.99889 |
| A8s, monotone | 59.764 | 61.944 | -2.180 | 0.96481 |
| A8s, paired | 65.606 | 61.944 | +3.662 | 1.05912 |
| 64s, all flops | 37.317 | 41.333 | -4.016 | 0.90284 |
| 64s, rainbow, ten or higher | 33.445 | 41.333 | -7.888 | 0.80916 |
| 64s, rainbow, nine or lower | 53.923 | 41.333 | +12.590 | 1.30460 |
| 64s, two-tone | 38.125 | 41.333 | -3.208 | 0.92239 |
| 64s, monotone | 40.236 | 41.333 | -1.097 | 0.97346 |
| 64s, paired | 34.394 | 41.333 | -6.939 | 0.83212 |

## Does a shared suit matter?

Looking only at deals where the hands share a suit, A8s has 64.99%; looking only at deals where they do not, 61.91%. A8s does better with a shared suit, by 3.08 points.

**A8s against 64s by suit overlap, in percent**

| Deals | Specific deals | Share of deals | A8s wins | Ties | 64s wins | A8s equity |
| --- | --- | --- | --- | --- | --- | --- |
| Share a suit | 4 | 25.00 | 64.694 | 0.592 | 34.714 | 64.990 |
| No shared suit | 12 | 75.00 | 61.669 | 0.489 | 37.842 | 61.914 |

## How often this matchup comes up

How often does it happen? 16 of the 1,624,350 ordered deals (0.0010%) are A8s against 64s, and 32 (0.0020%) if either hand may sit in either seat.

## A worked example

Put $100 each into a $200 pot and deal every board once: A8s averages $125.36 back, ahead of its $100 by $25.36, while 64s averages $74.64, short of its $100 by $25.36.

A thousand deals look like this: A8s takes 624, 64s takes 371, 5 are ties.

## The same matchup from the other side

64s versus A8s is this same page seen from the other hand: 37.32% for 64s, 62.68% for A8s.

## Keep exploring

As8s against 6h4h is a ready-made deal for the calculator, with no suit in common between the hands. The neighboring matchups below replace one hand with another of similar strength.

- [Open As8s against 6h4h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As8s&p2=6h4h)
- [A8s combos](https://georgelipoker.com/combos/a8s.md)
- [64s combos](https://georgelipoker.com/combos/64s.md)
- [A8s vs 53s](https://georgelipoker.com/equity/a8s-vs-53s.md)
- [A8s vs 43s](https://georgelipoker.com/equity/a8s-vs-43s.md)
- [KTs vs 64s](https://georgelipoker.com/equity/kts-vs-64s.md)
- [All hand matchups](https://georgelipoker.com/equity.md)

## How this was computed

This is an exact count with no sampling. For the 16 ways to deal one A8s and one 64s without reusing a card, grouped by suit pattern, every one of the 1,712,304 possible boards is dealt and both seven-card hands are compared. A tie counts as half a win in the equity column, and each board is counted once under each of its ten three-card flops.

Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used.

## Related

- [A8s vs 53s: preflop equity](https://georgelipoker.com/equity/a8s-vs-53s.md)
- [A8s vs 43s: preflop equity](https://georgelipoker.com/equity/a8s-vs-43s.md)
- [KTs vs 64s: preflop equity](https://georgelipoker.com/equity/kts-vs-64s.md)