KJs vs 55: preflop equity

Dealt all in against each other, 55 takes 50.20% of the pot on average and KJs takes the other 49.80%.

KJs

49.80%

Wins 49.52%, ties 0.57%

55

50.20%

Wins 49.91%, ties 0.57%

Equity counts a tie as half a win. Exact over every board.

KJs against 55: the numbers

Exact preflop results for KJs against 55, in percent
HandWinsTiesLosesEquity
KJs49.5200.56649.91449.803
5549.9140.56649.52050.197

We compare a suited hand with a pocket pair. One hand holds a pair and the other holds two cards that both outrank it, which keeps the equity closer than most people expect.

With only 0.40 points between them, the board decides this matchup far more than the cards in hand. Ties are part of the picture: 0.57% of boards end in a split pot, and each side counts that as half a win.

KJs ranks number 20 of 169 starting hands, and 55 ranks number 27, by equity against a random hand.

Boards behind the percentages: 41,095,296 counted in all
HandBoards won, aboutBoards tied, aboutBoards lost, about
KJs20,350,000233,00020,512,000
5520,512,000233,00020,350,000

The total is exact: 24 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.

KJs against 55 read as odds
HandEquity as odds (to 1)Wins one deal inLoses one deal inPot odds needed to call (to 1)
KJs0.9922.0192.0031.008
551.0082.0032.0190.992

The last column is the break-even price: the pot odds a call needs to offer, as a ratio of pot to call.

Who is ahead on which flops

Split by what the flop looks like, 55 peaks at 77.42% on low rainbow flops (nine high or lower) and bottoms out at 43.89% on rainbow flops topped by a ten or better. The overall edge for 55 hides rainbow flops topped by a ten or better and two-tone flops, where KJs comes out in front.

KJs against 55 by flop texture, in percent
FlopShare of flopsKJs winsTies55 winsKJs equity
Rainbow, ten or higher24.59555.9850.25443.76156.112
Rainbow, nine or lower6.31422.1990.77277.02922.585
Two-tone46.54551.1860.33748.47751.354
Monotone5.21248.5382.63148.83149.854
Paired17.33446.1240.92652.95046.587

Rainbow flops have three suits, two-tone flops repeat one suit, monotone flops are all one suit, and paired flops repeat a rank.

Compared with a random hand

The table below sets each hand against its own random-hand baseline: a change of -12.77 points for KJs, from 62.57%, and -10.13 for 55, from 60.33%.

KJs and 55 here compared with each against a random hand, in percent
CaseEquity hereAgainst a random handChange in pointsTimes the random-hand equity
KJs, all flops49.80362.567-12.7640.79599
KJs, rainbow, ten or higher56.11262.567-6.4550.89683
KJs, rainbow, nine or lower22.58562.567-39.9820.36097
KJs, two-tone51.35462.567-11.2130.82078
KJs, monotone49.85462.567-12.7130.79681
KJs, paired46.58762.567-15.9800.74459
55, all flops50.19760.325-10.1280.83211
55, rainbow, ten or higher43.88860.325-16.4370.72753
55, rainbow, nine or lower77.41560.325+17.0901.28330
55, two-tone48.64660.325-11.6790.80640
55, monotone50.14660.325-10.1790.83126
55, paired53.41360.325-6.9120.88542

Does a shared suit matter?

Suit overlap shows up in the numbers. With a suit in common 55 has 50.37% equity, and with none in common it has 50.03%. 55 does better with a shared suit, by 0.34 points.

KJs against 55 by suit overlap, in percent
DealsSpecific dealsShare of dealsKJs winsTies55 winsKJs equity
Share a suit1250.0049.3280.60950.06349.632
No shared suit1250.0049.7130.52349.76449.975

How often this matchup comes up

KJs against 55 is made up of 24 specific-card matchups in one seat order, 0.0015% of the 1,624,350 ordered deals, and 48 counting both seat orders, 0.0030%.

A worked example

To see what the equity is worth, imagine $100 each in a $200 pot. 55 is worth $100.40 on average (+$0.40); KJs is worth $99.60 (-$0.40).

Think in thousands: about 499 of 1,000 go to 55, about 495 go to KJs, and about 6 are chopped.

The same matchup from the other side

55 against KJs adds nothing new: it is 50.20% for 55 and 49.80% for KJs, the same figures reversed.

The calculator link fills in KsJs against 5h5d, a deal where the two hands share no suit. Change any card to test your own hand. The neighboring matchups below swap one of the two hands for one of similar strength.

How this was computed

This is an exact count with no sampling. For the 24 ways to deal one KJs and one 55 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.

Bring your own hands to a session

Review the spots you actually play against these numbers in a Game Assessment, and leave with a one-page written plan.

Book a session