---
title: "A2s vs 87s: preflop equity"
url: "https://georgelipoker.com/equity/a2s-vs-87s.md"
canonical_url: "https://georgelipoker.com/equity/a2s-vs-87s"
last_updated: "2026-10-23"
type: "reference"
summary: "Who is ahead, A2s or 87s? A2s leads 54.39% to 45.61% before the flop, counted exactly over every board, with the split by flop type and suit."
related: ["https://georgelipoker.com/equity/a2s-vs-86s.md", "https://georgelipoker.com/equity/a2s-vs-76s.md", "https://georgelipoker.com/equity/qto-vs-87s.md"]
---

# A2s vs 87s: preflop equity

Who is ahead, A2s or 87s? A2s leads 54.39% to 45.61% before the flop, counted exactly over every board, with the split by flop type and suit.

Before any board card is dealt, A2s holds 54.39% equity against 87s, which leaves 87s with 45.61%.

## A2s against 87s: the numbers

**Exact preflop results for A2s against 87s, in percent**

| Hand | Wins | Ties | Loses | Equity |
| --- | --- | --- | --- | --- |
| A2s | 54.140 | 0.509 | 45.351 | 54.394 |
| 87s | 45.351 | 0.509 | 54.140 | 45.606 |

The matchup is suited hands on both sides, A2s against 87s. The two hands share no rank, which makes this a pure matchup of card strength, straight chances and flush chances.

That is a slim edge: neither hand is far ahead. Ties are part of the picture: 0.51% of boards end in a split pot, and each side counts that as half a win.

For context, A2s sits at number 46 of 169 starting hands and 87s at number 100 when each is run against a random hand.

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

| Hand | Boards won, about | Boards tied, about | Boards lost, about |
| --- | --- | --- | --- |
| A2s | 14,833,000 | 139,000 | 12,425,000 |
| 87s | 12,425,000 | 139,000 | 14,833,000 |

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.

**A2s against 87s read as odds**

| Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) |
| --- | --- | --- | --- | --- |
| A2s | 1.193 | 1.847 | 2.205 | 0.838 |
| 87s | 0.838 | 2.205 | 1.847 | 1.193 |

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

Split by what the flop looks like, A2s peaks at 60.64% on paired flops and bottoms out at 34.51% on low rainbow flops (nine high or lower). The overall edge for A2s hides low rainbow flops (nine high or lower), where 87s comes out in front.

**A2s against 87s by flop texture, in percent**

| Flop | Share of flops | A2s wins | Ties | 87s wins | A2s equity |
| --- | --- | --- | --- | --- | --- |
| Rainbow, ten or higher | 25.220 | 57.285 | 0.221 | 42.494 | 57.395 |
| Rainbow, nine or lower | 5.689 | 34.216 | 0.586 | 65.198 | 34.509 |
| Two-tone | 46.727 | 52.986 | 0.265 | 46.749 | 53.118 |
| Monotone | 5.273 | 50.842 | 3.432 | 45.726 | 52.558 |
| Paired | 17.091 | 60.301 | 0.678 | 39.021 | 60.640 |

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

The table below sets each hand against its own random-hand baseline: a change of -2.99 points for A2s, from 57.38%, and -2.33 for 87s, from 47.94%.

**A2s and 87s 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 |
| --- | --- | --- | --- | --- |
| A2s, all flops | 54.394 | 57.379 | -2.985 | 0.94798 |
| A2s, rainbow, ten or higher | 57.395 | 57.379 | +0.016 | 1.00028 |
| A2s, rainbow, nine or lower | 34.509 | 57.379 | -22.870 | 0.60142 |
| A2s, two-tone | 53.118 | 57.379 | -4.261 | 0.92574 |
| A2s, monotone | 52.558 | 57.379 | -4.821 | 0.91598 |
| A2s, paired | 60.640 | 57.379 | +3.261 | 1.05683 |
| 87s, all flops | 45.606 | 47.936 | -2.330 | 0.95139 |
| 87s, rainbow, ten or higher | 42.605 | 47.936 | -5.331 | 0.88879 |
| 87s, rainbow, nine or lower | 65.491 | 47.936 | +17.555 | 1.36622 |
| 87s, two-tone | 46.882 | 47.936 | -1.054 | 0.97801 |
| 87s, monotone | 47.442 | 47.936 | -0.494 | 0.98969 |
| 87s, paired | 39.360 | 47.936 | -8.576 | 0.82109 |

## Does a shared suit matter?

Of the deals of this matchup, 4 share a suit (A2s at 55.93%) and 12 do not (53.88%). A2s does better with a shared suit, by 2.05 points.

**A2s against 87s by suit overlap, in percent**

| Deals | Specific deals | Share of deals | A2s wins | Ties | 87s wins | A2s equity |
| --- | --- | --- | --- | --- | --- | --- |
| Share a suit | 4 | 25.00 | 55.638 | 0.591 | 43.771 | 55.933 |
| No shared suit | 12 | 75.00 | 53.640 | 0.482 | 45.878 | 53.881 |

## How often this matchup comes up

A2s against 87s is made up of 16 specific-card matchups in one seat order, 0.0010% of the 1,624,350 ordered deals, and 32 counting both seat orders, 0.0020%.

## A worked example

Worked example: both players commit $100, so $200 sits in the middle. Over every board, A2s' average share is $108.78 (a gain of $8.78) and 87s' is $91.22 (a loss of $8.78).

A thousand deals look like this: A2s takes 541, 87s takes 454, 5 are ties.

## The same matchup from the other side

Swap the hands and you get 87s with 45.61% against A2s with 54.39%. We keep one page per matchup, with the better-ranked hand first.

## Keep exploring

Try As2s against 8h7h in the calculator: the hands share no suit, and every card can be changed. The links after it are the closest matchups in the ranking.

- [Open As2s against 8h7h in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=As2s&p2=8h7h)
- [A2s combos](https://georgelipoker.com/combos/a2s.md)
- [87s combos](https://georgelipoker.com/combos/87s.md)
- [A2s vs 86s](https://georgelipoker.com/equity/a2s-vs-86s.md)
- [A2s vs 76s](https://georgelipoker.com/equity/a2s-vs-76s.md)
- [QTo vs 87s](https://georgelipoker.com/equity/qto-vs-87s.md)
- [All hand matchups](https://georgelipoker.com/equity.md)

## How this was computed

Nothing here is simulated. The 16 deals of A2s against 87s fall into a few suit patterns, each dealt against all 1,712,304 boards, with both best five-card hands compared on every board. Ties give each hand half a win, and the flop rows count a board under each of its ten flops.

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

## Related

- [A2s vs 86s: preflop equity](https://georgelipoker.com/equity/a2s-vs-86s.md)
- [A2s vs 76s: preflop equity](https://georgelipoker.com/equity/a2s-vs-76s.md)
- [QTo vs 87s: preflop equity](https://georgelipoker.com/equity/qto-vs-87s.md)