Online Blackjack - Casino Guide by Casumo

Card values in Blackjack

In Blackjack, the cards numbered 2 to 10 have a value that’s equal to their numbers. The Jack, Queen and King have a value of 10 while the Ace can either be one or 11 depending on what suits you best.

A hand with an Ace valued as 11 is called a ‘soft hand’, meaning that the hand will not bust by taking an additional card. The value of the Ace changes to one so that your hand does not exceed 21. Hands without an Ace are called ‘hard’.

For the ultimate guide on how to play blackjack, we’ve created our very own blackjack cheat sheet to help you quickly learn the ropes before you hit the tables. There’s far more to blackjack than knowing the rules and once you’ve studied this sheet, you’ll be a sharper and a more contained blackjack player.

Blackjack Cheat Sheet Options Explained

  • (DD) Double down - As the bet suggests, doubling-down simply means placing another bet on your original one.
  • (H) Hit - Take another card from the dealer
  • (H/P) Split if allowed to, double afterwards, otherwise hit - If the situation or the game allows you to split, split the cards and place an additional bet as you’ll be in a favourable position. If no splitting is allowed or doubling down, then hit.
  • (S) Stand - Take no more cards.
  • (P) Split - If the first two cards of your hand have the same value, you can split them into two hands, which will be played separately. If you split a hand, you’ll need to place an additional bet to cover both hands. The dealer splits the two cards and draws an additional card on each. You will then continue playing out the two separate hands. Note that if you split a hand with 2 Aces, you’ll only be dealt one card on each hand and Ace + 10 in a split hand, doesn’t equal a Blackjack (you will get a normal 1:1 pay).
  • (H/R) Surrender if allowed, otherwise hit - If you’re in a position where your chances of beating the dealer are very slim, you can choose to surrender. You can also hit if surrender is now allowed.

Blackjack Cheat Sheet

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Blackjack rules

When you play a game of online Blackjack, you’ll play against the house and your objective is to get a hand that equals or is as close as possible to 21. If at any point during the game the total value of your hand exceeds 21 you’ll lose your wager.

The minimum amount you can wager varies according to the table. Usually, minimum bets for online Blackjack go as low as €0.10 per bet (or other currency equivalents). After you place your bet, you’ll be dealt two cards, face-up.
The dealer also draws two cards for the house, one face up and one face down. After the cards are dealt, you must decide whether to ‘hit’ or ‘stand’. Hit means asking for another card. Stand means you won’t take any more cards.

You can ask for as many cards as you want as long as the total of your cards does not exceed 21. If you do exceed 21, your hand is ‘bust’, meaning that you’ve lost that round. Once you stand, the dealer asks other players sitting at the table if they want to stand or hit. Once all the players around the table are satisfied with their hands or have busted, the dealer reveals the hidden card.
The dealer must hit on any total that is 16 or lower and stand on 17 or higher. When the dealer stands or busts, winners are announced. A winning hand is one in which the total of your hand is higher than the dealer’s.

If all players have either busted or gotten Blackjacks, the dealer will usually not complete their hand.

How to use bet insurance in online Blackjack

Insurance is a type of side bet that can be taken only if the dealer’s up card is an Ace. The purpose of insurance is to prevent players from losing their entire bet in the event the dealer is dealt Blackjack.
If the dealer gets Blackjack, you’ll get your original wager back, but you’ll lose the insurance. If the dealer doesn’t get Blackjack, the house takes the insurance bet and normal pay continues. In both cases, any win is paid as normal.

The dealer will ask whether any of the players would like insurance if the dealer draws an Ace as their first card.

Taking an extra card in blackjack (hit) is a fundamental part of any strategy as long as you’re aware of your chances of going bust before deciding to hit. Keep in mind that the dealer will keep hitting until he reaches 17 (the number varies depending on the blackjack game, but 17 is the standard).

Once the dealer gets a minimum of 17, the dealer will stop drawing cards. The image does not take into account the cards that the dealer has. This probability is calculated purely on the chances of going bust by drawing an additional card (H).

Blackjack Hand Bust Probability Sheet - Casumo

Placing Bets in Blackjack

When you “take a seat” at the Blackjack table, you place a bet by selecting a coin value from the available options and simply click on the chip icon.

How to place a side bet

In most Blackjack games, you can also place 2 types of side bets which enable you to win extra money on top of your regular bet. These side bets are known as Perfect Pairs and 21+3.

How to place a Perfect Pairs side bet

If you place a Perfect Pairs side bet, you can win when the first 2 cards dealt to you by the dealer form any sort of pair, such as 2 Aces or 2 Queens. There are 3 types of pairs, each with a different payout:

Perfect Pair - same suit ex. 2 Aces of hearts
Coloured Pair - different suits of the same colour example, 3 of Diamonds and 3 of Hearts
Mixed Pair - different suits of a different colour example, 9 of Diamonds and 9 of Clubs

How to place a 21+3 side bet

The 21+3 side bet gives you the chance to win if your first 2 cards + the dealer’s up card include any of the following winning combos:

Suited Trips - an identical triplet such as 3 Queens of Hearts
Straight Flush - in numerical sequence and same suit, for example, 10, Jack and Queen of Diamonds
Three of a Kind - same value but different suits, such as any 3 non-matching Queens
Straight - in numerical sequence but different suits, such as 2 of Spades + 3 of Clubs + 4 of Hearts
Flush - non-sequential cards in the same suit, example, 2, 6 and 10 of Clubs

How to play Online Blackjack

Blackjack is a very popular card game in which one or more players compete against a dealer (the house). There are different types of online Blackjack, but the key objective of the game is always the same: to try and win by getting as close to twenty-one as possible, without going over.

The game is played with up to 8 decks of 52 ordinary playing cards. To win in Blackjack, you must either get 21 on your first two cards (this is called a ‘Blackjack’ or ‘Natural’), reach a final score higher than the dealer without exceeding 21 or let the dealer draw additional cards until their hand exceeds 21.

Basic Blackjack Strategy
There are a few basic strategies that you can use to improve your chances of winning at blackjack. One of the most important is to always hit when your hand is 11 or less, and to always stand when your hand is 17 or more. You should also double down when your hand is 11 and the dealer's upcard is 6 or less, and split when your hand is 21 and the dealer's upcard is not an ace.

Blackjack Betting
There are a few different ways to bet in blackjack. You can make a standard bet, which is a bet on the outcome of the hand. You can also make a side bet, which is a bet on a specific outcome, such as whether or not the dealer will have a blackjack.

Blackjack Variations
There are many different variations of blackjack. Some of the most popular variations include:

American blackjack: This is the most common variation of blackjack. It is played with 6 to 8 decks of cards, and the dealer has a hole card.

European blackjack: This variation is played with 1 deck of cards, and the dealer does not have a hole card.

Spanish 21: This variation is played with 4 decks of cards, and the dealer has a hole card. 

Blackjack Tips
Here are a few tips to help you improve your chances of winning at blackjack:

  • Practice playing blackjack online or with friends before you play for real money.
  • Learn the basic blackjack strategy and stick to it.
  • Be aware of the different blackjack variations and their rules.
  • Manage your bankroll and don't bet more than you can afford to lose.

How to win at Blackjack

There is no sure way to win at Blackjack, no matter which strategy you use.

Although many players believe they have found the ultimate Blackjack strategy to increase their chances of winning, this simply cannot be true, no matter how long they play, how much they spend or at which Blackjack table they sit.

The sections below take a look at common strategies that have become popular among Blackjack players over the years. Please keep in mind that these are just tips and nothing more!

Blackjack strategies and tips

Although many of the Blackjack systems and strategies out there look cool and claim they work for real, we wouldn’t recommend using them. Remember that Blackjack is a game you play for fun. 

No mathematical formula or complex systems like Positive Progression (betting more after you win) or Negative Progression (increasing the amount you bet after a loss) will be able to defeat the house. The odds of the game remain exactly the same irrespective of which Blackjack system you use.

In the sections below we’ve taken a look at how seasoned Blackjack players play the game.

When to Double Down

When should you use the Double Down option? Many players believe that when you Double Down on a hard 11 you increase your chances of winning. This can be done against any dealer’s up card. So for example, if you have a 6 and a 5, you would Double Down. 

You should also consider Doubling Down on 10 when the dealer’s up card is 9 or less. The reason is that your chances of winning increase when you hold a two-card 10 against any dealer’s up card of 9 or less. 

Other Double Down strategies include Doubling Down on an Ace and a 2, through to an Ace and a 7, but only when the dealer’s up card is a 5 or 6 . The reason is that when you’re holding a soft 13 through to a soft 18, you stand to win more if you Double Down.

When and what to split

Usually, seasoned Blackjack players always split a pair of Aces, regardless of what the dealer’s up card is. They will also split a pair of 8s because it gives them better chances of winning. The reason is that when you split a pair of 8s, you will end up playing two hands each starting with an 8, rather than playing one hand of 16 and hitting.

However, some players won’t risk splitting a pair of 8s when the dealer’s up card is a 9, 10, or Ace. 

On the other hand, you should never split a pair of 5s. This is because two 5s make a hard 10 and you get better odds by hitting on a 10 than on two hands each starting with a 5. The same reasoning goes for a pair of 10s. Keeping them together as a hard 20 makes for a greater winning play in all circumstances.

When and what to hit

When the dealer’s up card is 2 or 3, you should always hit a hard 12. 

If your hand is a soft 18 (Ace + 7) you should always hit when the dealer’s up card is 9, 10, or Ace. If you draw a small card, like an Ace, 2, or 3, you’ll have a hand higher than 18, which improves your chances of winning. And if you draw a ten-valued card, you’ll still be in a good position.

When to stand

Most players split a pair of 9s when the dealer’s up card is 9 or less. But when the dealer shows a 7, they prefer to stand because the odds of winning are better than splitting. This is because there is a good chance that the dealer will draw a ten-valued card (there are four times as many ten-value cards in a deck than other cards). 

If this happens, then the dealer would get 17. And your pair of 9s, which is a hard 18, would beat the potential 17.

Some Blackjack history

Blackjack originated from a game known simply as twenty-one. Miguel de Cervantes, the Spanish author of the adventures of Don Quixote makes the first written reference to Blackjack in his tale "Rinconete y Cortadillo", written between 1601 and 1602. In his story, he calls the game ‘veintiuna’, stating that the aim of the game is to reach 21 points without going over and that the Ace can count as either 1 or 11. Soon after the French Revolution, we find the game of Twenty-One is widespread across Europe, eventually reaching the US.

The name Blackjack came from a term used in an American version of the game. In this version, gambling houses offered a ten-to-one payout if the player's hand consisted of the Ace of spades and a black Jack. This hand was called a "Blackjack". Today, we call a ‘Blackjack’ any hand of an Ace plus a ten or face card, irrespective of suits or colors.

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