How to Play Blackjack — Basic Strategy, Card Values & When to Hit or Stand

What Is Blackjack?

Blackjack (also called 21) is the world's most popular casino card game — and the only mainstream casino game where the player's decisions significantly affect the outcome. The goal is simple: get a hand total closer to 21 than the dealer without going over.

What makes blackjack special is that perfect play — called basic strategy — reduces the house edge to around 0.5%, making it the best odds in any casino. Our practice game lets you learn and internalize this strategy without risking a cent.

Card Values

Blackjack card values are straightforward:

• Number cards (2–10): Face value. A 7 is worth 7.
• Face cards (Jack, Queen, King): Worth 10 each.
• Ace: Worth 11 or 1 — your choice, and it shifts automatically to keep you under 21.

Suits are irrelevant in blackjack. Only the numeric value matters.

Blackjack (natural 21): An Ace plus any 10-value card (10, J, Q, K) dealt as your first two cards. This beats everything except the dealer also having blackjack, and typically pays 3:2 (you bet $10, you win $15).

How a Hand Plays Out

Here's the flow of a standard blackjack hand:

1. Place your bet before any cards are dealt.
2. Initial deal: You receive two cards face-up. The dealer receives one card face-up (the upcard) and one face-down (the hole card).
3. Player decisions: Based on your hand and the dealer's upcard, you choose to hit, stand, double down, or split (explained below).
4. Dealer plays: After all players finish, the dealer reveals the hole card and plays by fixed rules — typically hitting on 16 or less and standing on 17 or more.
5. Resolution: If you're closer to 21 without busting, you win. If the dealer is closer, you lose. Ties (pushes) return your bet.

Busting: If your hand exceeds 21, you lose immediately — even if the dealer would also bust. This is the house's primary edge.

Soft Hands vs. Hard Hands

This distinction is the most important concept in blackjack strategy:

• Hard hand: A hand without an Ace counting as 11, or no Ace at all. Examples: 10+7 = hard 17. 10+6+A = hard 17 (the Ace must count as 1 to avoid busting).
• Soft hand: A hand with an Ace counting as 11 without busting. Examples: A+6 = soft 17. A+3+3 = soft 17.

Why it matters: Soft hands are safer because they can't bust with one more card. If you hit soft 17 and draw a 10, your Ace drops from 11 to 1, giving you hard 17 — no bust. This safety net means you should play soft hands more aggressively than hard hands of the same total.

Basic strategy treats soft and hard hands completely differently. A hard 17 is a firm stand. A soft 17 is a hit (or double down against certain dealer cards). Mixing them up is the most common beginner mistake.

Your Options: Hit, Stand, Double, Split

On each turn, you have up to four options:

• Hit: Take another card. You can hit as many times as you want until you stand or bust.
• Stand: Keep your current hand and end your turn.
• Double down: Double your bet, take exactly one more card, then stand. This is your most powerful weapon when the odds favor you — it lets you put more money on the table at the optimal moment.
• Split: If your first two cards are the same rank (e.g., two 8s), you can split them into two separate hands, each with its own bet. You then play each hand independently.

Some games also offer surrender, where you forfeit half your bet to abandon a terrible hand. When available, it's correct to use against the worst matchups (like 16 vs. dealer 10).

The art of blackjack is choosing the right option for every combination of your hand and the dealer's upcard. That's where basic strategy comes in.

Basic Strategy: Hard Hands

Basic strategy is a mathematically derived set of rules that tells you the optimal play for every possible hand. Here are the hard-hand rules:

• Hard 8 or less: Always hit. You can't bust, and standing this low is never correct.
• Hard 9: Double down if the dealer shows 3–6. Otherwise hit.
• Hard 10: Double down if the dealer shows 2–9. Hit against 10 or Ace.
• Hard 11: Double down against everything. This is the most profitable doubling opportunity in blackjack.
• Hard 12: Stand if the dealer shows 4–6 (they're likely to bust). Hit against everything else.
• Hard 13–16: Stand if the dealer shows 2–6. Hit if the dealer shows 7 or higher. These are the "stiff" hands — dangerous to hit but dangerous to stand on. You're playing defense, hoping the dealer busts.
• Hard 17 or more: Always stand. Your hand is strong enough, and the risk of busting outweighs the potential gain.

The core logic: when the dealer shows a weak upcard (2–6), they're more likely to bust. Stand and let them self-destruct. When the dealer shows strength (7–A), you need a better hand — so hit despite the risk.

Basic Strategy: Soft Hands

Soft hands are played more aggressively because the Ace provides a safety net:

• Soft 13–14 (A+2, A+3): Double if dealer shows 5–6. Otherwise hit.
• Soft 15–16 (A+4, A+5): Double if dealer shows 4–6. Otherwise hit.
• Soft 17 (A+6): Double if dealer shows 3–6. Otherwise hit. Never stand on soft 17 — it's a common beginner trap.
• Soft 18 (A+7): This is the trickiest soft hand. Double against 3–6. Stand against 2, 7, 8. Hit against 9, 10, A. Many players always stand on 18, but against a dealer 9 or 10, you need to try for something better.
• Soft 19 (A+8): Always stand. Soft 19 is a strong hand.
• Soft 20 (A+9): Always stand. Don't get greedy.

The pattern: double down against weak dealer cards (to maximize profit on favorable situations) and hit against strong ones (to improve your hand while the Ace protects you from busting).

Basic Strategy: Splitting Pairs

Pair splitting follows specific rules based on which pair you hold:

• Always split Aces: Two separate hands starting with an Ace are vastly better than a single hand totaling 12. This is one of the highest-value plays in blackjack.
• Always split 8s: A pair of 8s equals hard 16 — the worst possible hand. Two separate 8s are much more playable. Split even against a dealer 10 or Ace.
• Never split 10s: A pair of 10s is 20 — one of the best hands possible. Don't break it up.
• Never split 5s: A pair of 5s is hard 10 — a great doubling hand. Treat it as a hard 10 and double or hit.
• Never split 4s: A pair of 4s is 8, and two separate 4s aren't an improvement. Hit (or double against dealer 5–6 if allowed).
• Split 2s, 3s, 6s, 7s when the dealer shows 2–7. Hit otherwise.
• Split 9s when the dealer shows 2–6 or 8–9. Stand against 7 (your 18 beats the dealer's likely 17). Stand against 10 and Ace.

The Dealer's Upcard: Your Compass

Everything in basic strategy revolves around the dealer's upcard. Here's why each category matters:

• Dealer shows 2–3 (weak): The dealer will bust about 35–38% of the time. Play cautiously but don't go too passive — these aren't guaranteed busts.
• Dealer shows 4–6 (very weak): The dealer busts 40–42% of the time. This is where you double down aggressively and stand on stiff hands. Let them self-destruct.
• Dealer shows 7–9 (strong): The dealer will likely make a hand of 17–19. You need to hit and improve, even if it's risky. Standing on 15 against a dealer 8 is a slow death.
• Dealer shows 10 or Ace (very strong): The dealer has a high probability of 20 or 21. Hit aggressively, surrender when available, and accept that some of these hands are just going to lose.

Think of the dealer's upcard as a weather forecast. Low cards mean storms for the dealer. High cards mean storms for you. Dress accordingly.

Common Mistakes

• Standing on soft 17: Soft 17 is not a good hand. You have a free shot at improving it with zero risk of busting. Always hit (or double).
• Never splitting 8s against a 10: It feels suicidal, but hard 16 is worse than two fresh 8s. The math is clear: splitting loses less money in the long run.
• Taking insurance: When the dealer shows an Ace, the casino offers "insurance" — a side bet that pays 2:1 if the dealer has blackjack. It's a sucker bet. The house edge on insurance is over 7%. Decline every time.
• Playing by "feel" instead of strategy: "I just feel like the next card will be a 10" isn't a strategy. Basic strategy was derived from computer simulations of billions of hands. Trust the math, not your gut.
• Copying the dealer: Some players think "the dealer stands on 17, so I should too." The dealer has different rules and advantages. Your strategy is not the dealer's strategy.
• Chasing losses: Doubling your bet after a loss (the Martingale system) doesn't change the underlying odds. It just makes the inevitable bad streak more devastating. Stick to flat betting while learning.