Double Deck Blackjack Odds

Double-Deck Blackjack Strategy Introduction. To use the basic strategy, look up your hand along the left vertical edge and the dealer's up card along the top. As you probably expected, the house edge is higher playing a 6:5 blackjack game. This example shows that the house edge is lower when the game has fewer decks in play. Differences In Gameplay Depending On Deck Size. Single deck and double deck blackjack are often played differently than six and eight deck blackjack. By comparison, the $10$2,000 six-deck game has the dealer hot on soft 17, causing the House edge to rise to 0.48%. A better choice for those who want to play for low stakes is the $10$2,000 double-deck table, where the dealer hits on soft 17 and DAS is permitted, but RSA and surrender are not. The House margin there is 0.45%. By way of an example, according to Schlesinger, if you incorporate all of the C-D strategy on his strategy card for a double-deck game with S17 and DAS, the house edge can be reduced by 5.3% compared to the traditional T-D basic strategy (from 0.19% to 0.18%). For more information on the effect of the C-D basic strategy on the house edge.

A natural blackjack is only 4.8%, which essentially is an ace dealt with a ten card straight off the initial deal. Normally the odds are 3 to 2 and you would win $3 for every $2 wagered. It's a small percentage but it's the most desirable hand to get. The lowest hand you can get is two points (two aces).

House edge means the percentage of the player's bet the casino wins on average. This is worth figuring out since the size of house edge has everything to do with how likely you're to win. Educated players always find the games with the least house edge possible and therefore win the most - or at least lose the least.

For example, if house edge is 1.89%, the player loses $1.89 on average out of every $100 bet he makes. Obviously the player doesn't lose that amount on every single bet; you might win two hands and then lose six hands in a row but in the long run the loss will be about $1.89 per bet. One of the goals of Gaming the Odds is to teach you all about perfect blackjack strategy and to minimize the house edge. You can find several house edge percentages for blackjack game variations below in order to help you to find the best games.

The Amount of Decks

Firstly, what kind of an effect the amount decks has on casino's advantage? The table below displays the house edge for a standard blackjack game: blackjack pays 3:2, the dealer stands on soft 17, doubling is allowed for any two cards and splitting to four hands is allowed.

Number of DecksHouse Edge
Single Deck-0.03%
Two Decks+0.25%
Four Decks+0.38%
Six Decks+0.42%
Eight Decks+0.44%

Under those rules it would actually be profitable to play according to basic strategy with a single deck. It's always optimal to play according to basic strategy but in the vast majority of cases you're still going to have negative expectation.

Double Deck Blackjack Odds Real Money


Game and Rule Variations

Blackjack Games

Let's move on to the next table, which features other blackjack game variations and their house edges. In order to make it easier to compare these games, all the house edge percentages are for six-deck gamesunless otherwise stated.

GameHouse Edge
Atlantic City Blackjack+0.42%
Blackjack Switch+0.58%
Double Attack Blackjack *+0.61%
Double Exposure Blackjack+0.67%
European Blackjack+0.62%
Multiple Action Blackjack **+0.42%
Pontoon Blackjack+0.45%
Spanish 21+0.37%
Super Fun 21+1.40%
Three Card Blackjack+2.10%
Vegas Downtown Blackjack+0.62%
Vegas Strip Blackjack+0.53%

* Played with a specific amount of decks (which isn't six).
** Multiple hands played but probability equal to standard blackjack.

The table above was made to give you some idea of which games are better to play than others. It's also important to remember that some casinos may operate with slightly different rules which either increase or decrease the house advantage of the game.

Blackjack Rule Variations

What about other rule variations, then? I'm going to list some of the more common blackjack rule variations and their house edges. The tables below consists of changes made to standard blackjack rules:

Dealer Hits Soft 17
# of DecksHouse Edge
Single Deck+0.15%
Two Decks+0.45%
Four Decks+0.59%
Six Decks+0.63%
Eight Decks+0.66%
Player Can Only Double 9-11
# of DecksHouse Edge
Single Deck+0.11%
Two Decks+0.36%
Four Decks+0.48%
Six Decks+0.52%
Eight Decks+0.54%
Player Can Only Double 10-11
# of DecksHouse Edge
Single Deck+0.26%
Two Decks+0.48%
Four Decks+0.58%
Six Decks+0.61%
Eight Decks+0.63%
Dealer Doubles on 17
# of DecksHouse Edge
Single Deck-0.03%
Two Decks+0.25%
Four Decks+0.38%
Six Decks+0.42%
Eight Decks+0.44%
Player Can Resplit Aces
# of DecksHouse Edge
Single Deck-0.06%
Two Decks+0.20%
Four Decks+0.32%
Six Decks+0.35%
Eight Decks+0.37%
Blackjack Pays 6:5
# of DecksHouse Edge
Single Deck+1.36%
Two Decks+1.62%
Four Decks+1.75%
Six Decks+1.78%
Eight Decks+1.80%

A couple of conclusions: first of all, the last section ('Blackjack Pays 6:5') shows you how unprofitable it is to play those games. Never play a game where blackjack pays 6:5.

Secondly, games where the player can resplit aces are preferable for the player. Try to find those games. It's also good for the player when the dealer doubles 17.

Blackjack Side Bets

And finally, blackjack side bets and house edges for them.

Side BetHouse Edge
21+3 Blackjack+3.20%
21 Madness+23.00%
Bonus Blackjack+24.00%
Match the Dealer+3.10%
Perfect Pairs Blackjack+4.10%
Royal Match Blackjack+6.50%
Super Match Blackjack+2.60%
Super Sevens Blackjack+11.70%
Bust It Blackjack+7.00%

No, casinos didn't include the 'side bet' option just to give players a better chance of winning. As you can see, side bets are good for the casino and bad for the player even if they might make the game a bit more exciting.

Double deck blackjack odds calculator

Favourable Blackjack Rule Variations for the Player

Here's a list of blackjack rule variations favourable for the player:

  • The less decks the better. (Games with one deck are the best.)
  • Double down on any 2 cards.
  • Blackjack pays 3:2.
  • Resplitting aces allowed.
  • Dealer stands on a 17.
  • Early/late surrender.
  • Low deck penetration (for card counters).
  • Insurance (for card counters).

Favourable Blackjack Rule Variations for the Casino

  • Side bets.
  • Double down on 10 and 11 only.
  • Dealer hits a soft 17.
  • The more decks the better.
  • Blackjack pays 6:5
  • Low deck penetration (against card counters).
  • No doubling down after splitting.
  • Not allowed to resplit aces.

I suggest trying to memorize these lists and look for games with beneficial blackjack rule variations for the player. Rule variations in favor of the casino should obviously be avoided.

Blackjack House Edge: FAQ

Do bet sizes impact house edge in blackjack?

It makes no difference whether you bet $10 or $10,000 - the house advantage stays the same. The amount you lose or win per bet changes, of course, depending on how big of an edge either you or the casino's got.

Which blackjack game has the smallest casino edge?

Suggesting all games are played with six decks - which is a common size for a blackjack shoe - Spanish 21 has the best house edge for the player according to the blackjack house edge table on top of this page. Standard 21 Blackjack is good too since you can actually have the edge by playing perfect basic strategy with a single deck.

Double Deck Blackjack Odds Genesis Open

How big is the house edge if I count cards?

This depends on many variables, such as which blackjack card counting systems you're going to use. In case you're using a highly complicated system, play perfectly and manage to find a good game to play, you may have a significant edge (even 3% or 4%).

Double deck blackjack odds

Additional Resources:

Double deck blackjack odds genesis open

Multi Hand Double / Two Deck Blackjack offered by Cryptologic is another impressive variant of the classic casino game where just two decks of cards instead of the standard six/eight make the difference. Whats great about playing Double Deck online, is that there are no unconventional rules that would increase the house edge, something that often happens in land based casinos.

There are two Double Deck Blackjack games offered online, one by Bovada and one by Cryptologic. Both use a similar set of rules, the main advantage of the version we review here is that you can play up to five hands per round, which is why it’s very popular with high rollers and more experienced gamers, that are able to take advantage of it.

Double Deck Blackjack Odds Game

The overall gaming experience is also top notch, the only drawback is that Cryptologic do not accept bets from USA players and do not allow free play, so if you are from the States or just looking to polish your skills, please check our Bovada Free Double Deck blackjack.

Multi Hand Two Deck

Two Deck Blackjack Rules

Does Double Deck Blackjack Have Better Odds

As the title would suggest, the Cryptologic product is played with two standard decks shuffled after each round, with five betting positions adding to the appeal. The dealer will draw to 16 and stand on all 17’s, while peaking for blackjack and offering the player Insurance. When this happens for the first time, you can simply select Yes/No to all and thus speed up the gameplay.

Double down option is available on any first two cards, but you will only be able to split identical cards, rather than same value cards as that is usually the case. One split is allowed per hand, but you get to hit or double after splitting if you wish to do so.

Cryptologic Limits & User Interface

Cryptologic Two Deck Blackjack offers no fewer than four table limits in the $10-$200, $25-$500, $100-$1,000 and $500-$5,000 range, meaning that low stakes players may be forced to switch to other blackjack variants in order to have access to lower bets. The game interface is pretty impressive and it definitely makes the action at the tables even more rewarding.