Blackjack Terms Explained

Sit down at a table for the first time and you’ll hear the dealer and the regulars rattle off blackjack terms nobody ever bothered to teach you. Most of that jargon just names a move. A couple of the words, though, hide rules that quietly cost you money, and the dealer certainly won’t point those out. Keep the free CasinoCalcs blackjack strategy chart open in another tab for the “what should I actually do” part.

Blackjack terms you’ll hear on every hand

Tap the felt for another card (that’s a hit), or wave a flat hand over your cards to stand. Go past 21 and you’ve bust, which loses your chips right there, and it doesn’t matter if the dealer busts a minute later as well. Honestly, that’s the casino’s whole trick. You have to act before the dealer, so you can be out of the hand before they’ve even flipped their second card.

A push is a tie. You and the dealer both end on 19, say, and your money just slides back to you.

The dealer’s face-down card goes by the name hole card. Plenty of European-style tables don’t deal it until the players are done, which matters if you double or split against an ace or a ten, because a dealer blackjack can then take the extra money too.

What is insurance in blackjack?

Let the dealer flip up an ace and, almost on cue, you’ll hear “insurance, anyone?” You’re being invited to put up to half your bet again on the dealer having a ten-value card face down, with 2:1 paid if they do.

It’s sold as protection, but the sums don’t back that up. Tens, jacks, queens and kings make four ranks out of thirteen, so that hidden card is ten-valued only a bit under a third of the time, roughly 30.8%. To break even at 2:1 you’d need it to be 33.3%, and the shortfall costs you about 7.7p for each pound you put on insurance, give or take. Card counters take it when the shoe is packed with tens; for anyone else the honest answer is no thanks. Play with different deck counts in the blackjack insurance calculator.

What does double down mean?

Doubling down means putting the same amount again next to your bet in exchange for exactly one more card. Most tables only allow it on your first two cards.

Used at the right moments, doubling is where you win back a good chunk of what the house grinds off you, so learn when it’s on. The textbook spot is hard 11 with the dealer showing anything from 2 up to 10. Slide another £10 out next to your first tenner and hope for a picture card, because one gives you 21. Hard 10 against a 2 to 9 isn’t far behind. Doubling a 13 because the last three hands went your way is how a night out gets short.

What is a split in blackjack?

Dealt a pair? You can split it into two hands, putting down a second stake equal to the first. Each hand then draws its own cards and is settled on its own.

Two rules cover most of it. Always split aces and eights, because a pair of 8s is 16, the worst total in the game, while two hands starting on 8 have a fighting chance. And don’t split tens or fives, ever. Breaking up a 20 is greedy, and a pair of fives is a 10, which you’d far rather double. One catch with aces: most casinos give each split ace a single card, and if a ten lands on it you’ve got 21 rather than a blackjack paid at 3:2.

What is soft 17?

Any hand where an ace is still counting as 11 is soft, which means one more card can never push it over. Hold ace-six and you’ve got soft 17: an ace on top makes 18, and a king knocks you back to plain old 17.

Where you’ll really bump into it, though, is the dealer’s rule. Look at the felt and it’ll say something like “dealer must stand on all 17s” or “dealer hits soft 17”. That second version lets the dealer have another go at improving, and it nudges the house edge up by around 0.2%. Not a lot per hand. Across a few thousand hands it’s money the casino didn’t have to work for, so if there’s a stand-on-17 table next door, sit there.

The 6:5 trap

Get an ace and a ten-valued card straight off the deal and that’s a natural, which on a decent table pays 3:2, turning a £10 bet into £15 of profit. Some tables pay 6:5, where the same tenner wins just £12. That one swap adds roughly 1.4% to the house edge, more than every other rule on this page put together, so if the felt says 6:5 it’s worth finding another seat. The blackjack payout calculator shows both side by side.

Surrender

Surrender, where it’s allowed, lets you bail out of a rotten hand once you’ve seen two cards, getting half your bet back. It feels a bit cowardly, yet a hard 16 staring at a dealer 9, 10 or ace costs you less on average if you hand it in. When it’s offered, it’s a rule working in your favour.

More tools: blackjack calculator, blackjack house edge calculator, blackjack bust calculator, blackjack card values.

Starting from zero? How to play blackjack walks through a hand, the dealer’s rules and the 21+3 side bet.