1. How Many Card Decks In Blackjack
2. Counting Cards Single Deck Blackjack
3. How To Card Count Blackjack In Single Deck
4. How To Count Cards Blackjack 1 Deck
5. How Many Card Decks In Blackjack

• Appendices
• Miscellaneous
• External Links

Therefore, it is crucial to understand how many a deck of 52 cards in Blackjack is used. Let us discuss this in detail. Number of Decks Required to Play the Game. Generally, if you want to involve yourself in a decent activity, you can start with only 21 cards. In most of the casinos, there are usually 6 to 8 decks used. All the 52 cards are included, and joker cards are excluded. Card counting has been a part of blackjack since the 1960s. Famous players including Humble and Uston published books on beating the house. Many of them are now considered among the classics of gambling literature. Counting cards in blackjack gives you an edge over the house when there are relatively more high cards in the deck. The standard 52-card deck of French-suited playing cards is the most common pack of playing cards used today. In English-speaking countries it is the only traditional pack used for playing cards; in many countries of the world, however, it is used alongside other traditional, often older, standard packs with different suit symbols and pack sizes. The most common pattern worldwide and the only. How Many Decks of Cards Are Used in Blackjack? You might enjoy the game of Blackjack with one or two decks with your few friends at home. But step into any casino, you will find at least five to eight decks of cards used in Blackjack game! Excluding jokers, each of these decks come with a standard 52 cards. Increased decks were introduced to increase house edge and to discourage card counters. Even though its virtually impossible to count cards when playing blackjack online. It is said that online blackjack is a lot fair due to how many decks in blackjack are used, as it is software running the games and not real life people who are able to split.

How Many Card Decks In Blackjack

Introduction

In playing blackjack online one problem I often face is not knowing how many decks are being used. This is a particular problem with Real Time Gaming casinos. The help files often do not indicate this rule, as well as other rules, and customer support are notorious for giving incorrect information on their own rules. So I devised a test to help determine the number of decks. This test is based on the player's first two cards and the dealer's first two.

The following table shows the probability for various configurations of the initial four cards in blackjack. Note the probabilites for a suited pair. Of all the hands I feel this is the best to test for, given both it's frequency and correlation to number of decks.

4-Card Hand	1 deck	2 decks	4 decks	6 decks	8 decks
4 singletons	0.676110	0.63692	0.618504	0.612530	0.609573
Non-suited pair	0.304250	0.286614	0.278327	0.275638	0.274308
Suited pair	0.047769	0.069582	0.076566	0.080006
Two non-suited pairs	0.010372	0.009771	0.009488	0.009397	0.009351
Two suited pairs	0.000271	0.000593	0.000725	0.000796
Two pair - 1 suited	0.003257	0.004744	0.00522	0.005455
3 of a kind - 3 suits	0.009220	0.008685	0.008434	0.008353	0.008312
3 of a kind - 2 suits	0.006514	0.009488	0.010441	0.010910
3 of a kind - 1 suit	0.000527	0.000773	0.000909
4 of a kind - 4 suits	0.000048	0.000045	0.000044	0.000044	0.000043
4 of a kind - 2 suits (3&1)	0.000033	0.000048	0.000057
4 of a kind - 2 suits (2&2)	0.000017	0.000037	0.000045	0.000050
4 of a kind - 3 suits	0.000136	0.000198	0.000218	0.000227
4 of a kind - 1 suit	0.000001	0.000002	0.000003
Total	1	1	1	1	1

To determine the number of decks in an online blackjack game keep a tally of both the total number of hands played and the number of suited pairs. Only count a hands as a suited pair if the other two are singletons. For example one suited pair and one non-suited pair does not count. In a single deck game the ratio of suited pairs to total hands will obviously be zero. In double deck this ratio will be about 4.8%. In a 4-deck game the ratio increases to 7.0%. After that the differences are too subtle are to tell without a gigantic sample.

Of course if you ever notice three of the same card on the screen at once that rules out a double deck game immediately. Despite my lack of faith in customer support knowing their own rules I would suggest at least asking. If they give you an incorrect answer, and you can prove it, you may get some free money in your account as a way of thanks. This has happened to me several times.

Counting Cards Single Deck Blackjack

Unfortunately it takes a fairly large sample size to have confidence in the number of decks between 2 and 4. After 250 hands the probability that the sample mean in a 2-deck game will be greater than 6.96% (the 4-deck theoretical mean) is 5.29%. Likewise the probability that the sample mean in a 4-deck game will be less than 4.78% (the 2-deck theoretical mean) is 8.76%. Increasing the sample size to 500 these numbers become 1.11% and 2.76%. At 1000 the numbers are 0.06% and 0.34%.

Written by: Michael Shackleford

Let's consider card counting on a blackjack game with 6 decks of cards. This is one of the most popular games at online and land casinos, but, do not forget that it is impossible to count cards online. The table and the graphics below show you how likely the counts are and what your winning odds will be.

% of times occurred in the games

Count

How To Card Count Blackjack In Single Deck

The most probable count to occur is a 'zero' count, however, sometimes differences occur and the table below shows just how.

How To Count Cards Blackjack 1 Deck

Count	%	Prob. this or more
-39	0,00000008%	100,00000000%
-38	0,00000020%	99,99999992%
-37	0,00000052%	99,99999972%
-36	0,00000168%	99,99999920%
-35	0,00000480%	99,99999752%
-34	0,00000888%	99,99999272%
-33	0,00001664%	99,99998384%
-32	0,00003104%	99,99996720%
-31	0,00006028%	99,99993616%
-30	0,00011232%	99,99987588%
-29	0,00021916%	99,99976356%
-28	0,00038904%	99,99954440%
-27	0,00072388%	99,99915536%
-26	0,00124204%	99,99843148%
-25	0,00207156%	99,99718944%
-24	0,00349764%	99,99511788%
-23	0,00577516%	99,99162024%
-22	0,00930460%	99,98584508%
-21	0,01452172%	99,97654048%
-20	0,02270716%	99,96201876%
-19	0,03450448%	99,93931160%
-18	0,05066440%	99,90480712%
-17	0,07535312%	99,85414272%
-16	0,10798116%	99,77878960%
-15	0,15243196%	99,6708%
-14	0,21385236%	99,5184%
-13	0,29419912%	99,3045%
-12	0,39597112%	99,0103%
-11	0,51736804%	98,6144%
-10	0,70998200%	98,1%
-9	0,90099252%	97,4%
-8	1,17157960%	96,5%
-7	1,56993548%	95,3%
-6	2,06477432%	93,7%
-5	2,76675644%	91,7%
-4	3,80111092%	88,9%
-3	5,44246824%	85,1%
-2	8,15994788%	79,7%
-1	13,10684724%	71,5%
0	16,83048012%	58,4%
1	13,10062740%	41,6%
2	8,15290812%	28,5%
3	5,43519040%	20,3%
4	3,79563692%	14,9%
5	2,76242648%	11,1%
6	2,06040976%	8,3%
7	1,56590072%	6,3%
8	1,16980792%	4,7%
9	0,90060712%	3,5%
10	0,71019488%	2,6%
11	0,51824868%	1,9184%
12	0,39732080%	1,4002%
13	0,29588316%	1,0028%
14	0,21550572%	0,7069%
15	0,15408880%	0,4914%
16	0,10962696%	0,33735420%
17	0,07674228%	0,22772724%
18	0,05193564%	0,15098496%
19	0,03565008%	0,09904932%
20	0,02349176%	0,06339924%
21	0,01506204%	0,03990748%
22	0,00968112%	0,02484544%
23	0,00603992%	0,01516432%
24	0,00371720%	0,00912440%
25	0,00223572%	0,00540720%
26	0,00135436%	0,00317148%
27	0,00079580%	0,00181712%
28	0,00044736%	0,00102132%
29	0,00026556%	0,00057396%
30	0,00014268%	0,00030840%
31	0,00007744%	0,00016572%
32	0,00004188%	0,00008828%
33	0,00002460%	0,00004640%
34	0,00001232%	0,00002180%
35	0,00000588%	0,00000948%
36	0,00000272%	0,00000360%
37	0,00000084%	0,00000088%
38	0,00000004%	0,00000004%

How Many Card Decks In Blackjack