Blackjack Basic Strategy Chart Explained: The Ultimate Guide

What a strategy chart actually is

A basic strategy chart is a complete, mathematically derived reference showing the correct action for every possible combination of your hand and the dealer's upcard. It isn't a set of tips or general guidelines — it's the output of exhaustive computer simulation across billions of hands, solved once for a given rule set and then valid for every hand you'll ever play under those same rules. Learning to read one, and matching it to your specific table, is arguably the single highest-value skill a blackjack player can build. This guide covers how a chart is organized, provides full reference tables for the most common rule set, and explains exactly why and how the "correct" chart shifts when table rules change.

If you haven't yet, it's worth reading blackjack basic strategy guide first for the reasoning behind why basic strategy works the way it does — this guide focuses specifically on reading and using the chart itself.

The three sections of every chart

Every standard basic strategy chart is split into three separate grids, because the three hand types behave differently enough to need their own logic:

1. Hard totals — hands with no Ace, or an Ace that can only count as 1 without busting (for example, a hand already containing an Ace and a 10, since counting the Ace as 11 there would bust). Covered in full in hard hands in blackjack explained.
2. Soft totals — hands containing an Ace currently counted as 11, which can absorb a large card without busting by dropping the Ace back to 1. Covered in full in soft hands in blackjack explained, with the general distinction explained in soft vs hard hands explained.
3. Pairs — your first two cards share the same rank, giving you the option to split into two independent hands.

Each grid is read the same way: your hand total (or pair) runs down the side, the dealer's upcard runs along the top, and the cell where they intersect gives you the correct action. This consistent structure across all three grids is deliberate — once you're comfortable reading one, the other two follow the exact same lookup logic, just applied to a different starting hand type.

Reading the action codes

Charts use a small set of standard abbreviations:

• H — Hit
• S — Stand
• D — Double down (if doubling isn't allowed in that specific situation, fall back to hitting)
• P — Split
• R — Surrender, where offered (if surrender isn't available, fall back to the next-best action, usually hitting)

Some charts use combined codes like "Dh" (double if allowed, otherwise hit) or "Ds" (double if allowed, otherwise stand) to be fully explicit about the fallback. This matters because not every table allows doubling on every total — a table restricting doubling to hard 9–11 only still needs a defined action for a chart cell recommending a double on, say, a soft 13, and the fallback is what tells you what to do instead.

Reference chart: hard totals

The table below reflects a common baseline rule set — 6 to 8 decks, dealer stands on soft 17 (S17), doubling after split allowed (DAS). Always confirm this matches your actual table before relying on it, since rule differences shift a handful of these cells (see the section on rule sensitivity below).

Your hand	2	3	4	5	6	7	8	9	10	A
8 or less	H	H	H	H	H	H	H	H	H	H
9	H	D	D	D	D	H	H	H	H	H
10	D	D	D	D	D	D	D	D	H	H
11	D	D	D	D	D	D	D	D	D	D
12	H	H	S	S	S	H	H	H	H	H
13	S	S	S	S	S	H	H	H	H	H
14	S	S	S	S	S	H	H	H	H	H
15	S	S	S	S	S	H	H	H	H	R/H
16	S	S	S	S	S	H	H	R/H	R/H	R/H
17 or more	S	S	S	S	S	S	S	S	S	S

The "R/H" cells mean surrender if your table offers it; otherwise hit. Notice the shape: totals of 17 and above always stand, totals of 8 and below always hit, and the real decision-making concentrates in the 9–16 range, where the dealer's upcard determines the correct action.

A few specific rows are worth understanding rather than just memorizing. Hard 12 stands only against a dealer 4, 5, or 6 — against every other upcard, including the seemingly weaker 2 and 3, it hits. This surprises new players, since 2 and 3 both look like "weak" dealer cards, but the actual bust probability for a dealer starting on 2 or 3 is lower than starting on 4, 5, or 6, since the dealer has more room to build a strong hand from a low card without going over. Hard 16 against a dealer 10 is the single most infamous cell in the entire chart — it hits, despite hard 16 being the weakest total that isn't automatically hit, because standing loses even more often against a dealer upcard that likely conceals a strong hidden hand. And hard 11, doubled against every single dealer upcard including a dealer Ace, reflects just how strong a starting total of 11 is: you're one good card away from a near-unbeatable total, and guaranteed exactly one more card makes that bet worth increasing regardless of what the dealer is showing.

Reference chart: soft totals

Soft totals use a separate grid because the flexible Ace changes the risk calculation — these hands can't bust from a single additional card, which opens up more doubling opportunities than the equivalent hard total would allow.

Your hand	2	3	4	5	6	7	8	9	10	A
Soft 13 (A,2)	H	H	H	D	D	H	H	H	H	H
Soft 14 (A,3)	H	H	H	D	D	H	H	H	H	H
Soft 15 (A,4)	H	H	D	D	D	H	H	H	H	H
Soft 16 (A,5)	H	H	D	D	D	H	H	H	H	H
Soft 17 (A,6)	H	D	D	D	D	H	H	H	H	H
Soft 18 (A,7)	S	D	D	D	D	S	S	H	H	H
Soft 19 (A,8)	S	S	S	S	S	S	S	S	S	S
Soft 20 (A,9)	S	S	S	S	S	S	S	S	S	S

Soft 18 is the single most nuanced row in this chart: it stands against a dealer's 2, doubles against 3 through 6, stands again against 7 or 8, and hits against 9, 10, or Ace. This isn't arbitrary — it reflects exactly how the dealer's bust probability and likely final total shift across that range of upcards. Against a weak dealer card (3–6), the extra bet from doubling capitalizes on a high dealer bust chance; against a 7 or 8, standing on a solid 18 is safer than risking it against a dealer total that's already likely to be competitive; against 9, 10, or Ace, the dealer's likely final total is strong enough that hitting to try to improve past 18 becomes worthwhile despite the small bust risk the flexible Ace helps manage.

It's also worth noting why soft hands unlock more doubling opportunities than the equivalent hard totals do. A hard 13, for instance, never doubles under any basic strategy chart — the bust risk from a single additional card is too high relative to the modest total. Soft 13 (Ace-2), despite representing the same numeric value as one interpretation of a hard 13, doubles against a dealer 5 or 6, because the Ace guarantees the hand can't bust from that same additional card. This is the clearest illustration of why soft and hard totals need entirely separate charts rather than one shared grid keyed only to the numeric total.

Reference chart: pairs

Your pair	2	3	4	5	6	7	8	9	10	A
2,2	P	P	P	P	P	P	H	H	H	H
3,3	P	P	P	P	P	P	H	H	H	H
4,4	H	H	H	P	P	H	H	H	H	H
5,5	D	D	D	D	D	D	D	D	H	H
6,6	P	P	P	P	P	H	H	H	H	H
7,7	P	P	P	P	P	P	H	H	H	H
8,8	P	P	P	P	P	P	P	P	P	P
9,9	P	P	P	P	P	S	P	P	S	S
10,10	S	S	S	S	S	S	S	S	S	S
A,A	P	P	P	P	P	P	P	P	P	P

A few rows are worth calling out directly. 5,5 is never split — it's treated as a hard 10 and played from the hard-totals logic instead, since two hands starting from a 5 each are worse than one hand starting from a strong 10. 10,10 is never split for the same underlying reason discussed throughout this site: a two-card 20 is already an excellent hand, and splitting it trades a near-guaranteed strong result for two uncertain ones. 8,8 and A,A are split against every single dealer upcard without exception, since both pairs start from a weak or awkward combined total (16 or soft 12) that's meaningfully improved by playing two hands instead of one. Full detail on the logic behind every pair is in when to split pairs in blackjack.

Why the "right" chart changes with the rules

The tables above are built for a specific, common rule combination: 6–8 decks, dealer stands on soft 17, doubling after split allowed. Change any of those rules and a handful of cells shift:

• Dealer hits soft 17 (H17) instead of standing: a small number of cells change, most notably some soft-hand doubling decisions and the 11-vs-Ace and hard-15/16-vs-Ace surrender decisions, since the dealer's own hand behaves slightly differently.
• Fewer decks (single or double deck): shifts a handful of doubling and surrender decisions slightly, since the remaining deck composition after the first few cards has a proportionally bigger impact with fewer decks in play.
• No doubling after split (no DAS): removes the double option from certain post-split hands, meaning the fallback action (usually hit) applies instead in those specific cells.
• No surrender offered: every "R/H" cell in the hard-totals table above simply becomes "H," since the surrender option doesn't exist at that table.

This is exactly why memorizing a single chart from a random source online without checking it against your actual table's rules can introduce small, avoidable errors on precisely the hands where getting it right matters most. For the full breakdown of how each individual rule affects the game, see blackjack rules explained.

Where basic strategy charts come from

Basic strategy isn't a matter of opinion or accumulated table experience — it's the product of exhaustive mathematical analysis. The foundational work dates back to the 1950s, when a group of researchers (commonly referred to as the Baldwin group) used manual calculations to work out approximate correct play, publishing some of the earliest strategy recommendations in 1956. Their work was later refined and popularized through computer simulation in the 1960s, most famously by mathematician Edward Thorp, whose analysis ran millions of simulated hands to solve for the mathematically optimal action in every situation. Modern charts, including the ones published here, are the direct descendants of that same underlying approach, just extended to cover the wider range of rule combinations found across today's much larger variety of tables — single- and multi-deck, S17 and H17, with and without surrender, and so on. The math itself hasn't meaningfully changed since; what's changed is the sheer number of distinct rule combinations a player might encounter, which is why "the" basic strategy chart doesn't exist as a single universal document, only as a family of charts each solved for a specific rule set.

Why published charts sometimes look slightly different from each other

If you compare basic strategy charts from a few different sources, you may notice small disagreements on a handful of cells, even when both claim to cover the same rule set. This usually comes down to one of a few things: rounding differences in situations where two actions produce nearly identical expected value (a true statistical coin-flip, essentially, where either action is defensible), differences in exactly which secondary rules the chart assumes (surrender availability, DAS, resplitting limits), or simply a chart built for a slightly different deck count than you're comparing it against. These differences are almost always confined to a small number of genuinely close-call cells, not the core shape of the chart — totals of 17+ standing, 8 or below hitting, and 8s and Aces always splitting are consistent across every legitimately sourced chart you'll find, regardless of minor disagreements elsewhere.

Chart differences: a worked comparison

To make the earlier point about rule sensitivity concrete, consider hard 16 against a dealer's Ace. On a standard S17 multi-deck table without surrender, basic strategy says hit — standing loses more often on average than the bust risk from hitting, given how strong the dealer's likely hand is. On the same table with late surrender available, the correct action changes to surrender instead, since giving up half your bet immediately produces a better expected result than either standing or hitting into a genuinely bad matchup. Neither answer is "more correct" in the abstract — they're both correct for their specific table, which is the entire point of matching your chart to your actual rules rather than treating basic strategy as one fixed, universal answer key.

Using a chart across different formats

The same chart applies whether you're playing a software-dealt table, a live-dealer table, or (where legal and available) a physical casino table — basic strategy is a function of the rules in play, not the format the game is presented in. What does change across formats is how practical it is to reference a chart while playing: software-dealt tables typically allow it freely, live-dealer platforms vary by operator policy, and physical casinos generally don't allow visible reference material at the table itself, which is part of why memorization through a trainer tool matters more for players who expect to spend time at physical tables specifically.

Mobile and app-based strategy trainers

A large share of players now learn and practice basic strategy through dedicated mobile apps and browser-based trainers rather than a static chart image. These tools typically deal a random hand, prompt you for the correct action, and immediately confirm whether you matched the chart for a selected rule set — repeating this thousands of times over a short period builds the same pattern recognition a chart image alone can't provide on its own. Many also track your accuracy by hand type (hard totals, soft totals, pairs) so you can identify specifically which section needs more practice, which is often more efficient than repeatedly drilling situations you've already mastered.

Walking through an example lookup

Say you're dealt a 6 and a 3 (hard 9) and the dealer shows a 5. Looking at the hard-totals table, find the "9" row and the "5" column — the cell reads "D," meaning double down. Now say instead you're dealt an Ace and a 6 (soft 17) against the same dealer 5. In the soft-totals table, the "Soft 17" row and "5" column also reads "D" — but the reasoning is different: with the hard 9, you're doubling because 9 is a strong enough total with a weak dealer upcard; with the soft 17, you're doubling because the Ace's flexibility means you can safely add a big card without busting, turning a mediocre 17 into a real chance at a strong final total. Same action, different underlying logic — which is exactly why the chart is split into separate sections rather than one combined grid.

Practicing a chart effectively

The most effective way to internalize a strategy chart is repetition against realistic hands, not passive memorization of the grid as a static image. Many free basic-strategy trainer tools deal random hands and prompt you for the correct action, showing immediately whether you matched the chart — repeated practice this way builds pattern recognition far faster than studying the full grid in one sitting. Most players find the hard-totals grid becomes automatic first, since it's used most often, with soft totals and pairs following as they come up less frequently but in a smaller, more memorable set of situations (particularly the "always split" and "never split" pairs, which are easy to lock in early).

Common chart-reading mistakes

• Using a chart built for the wrong rule set. A chart assuming the dealer stands on soft 17 gives a handful of wrong answers at a table where the dealer hits soft 17, and vice versa — always confirm the rule set a chart was built for before relying on it.
• Mixing up the hard-totals and soft-totals sections. A hand like Ace-6 needs the soft-totals grid, not the hard-totals one, since it plays very differently depending on which grid you check.
• Forgetting the pairs section exists separately. A pair like 8-8 should be checked against the pairs grid (which recommends splitting against every upcard), not treated as a hard 16 from the hard-totals grid, which would give a very different — and incorrect — recommendation.
• Applying surrender recommendations at a table that doesn't offer it. If your table doesn't offer surrender, every "R/H" cell simply becomes "H" — there's no substitute action beyond hitting.
• Forgetting insurance isn't part of the chart at all. Insurance is a separate side bet, not a basic-strategy decision tied to your hand total — see blackjack insurance explained for why it's treated independently.

Card counting and chart "deviations" — a brief note

Advanced players who count cards sometimes deviate from the standard basic strategy chart in specific, count-dependent situations — for example, standing on a hard 16 against a dealer 10 instead of hitting, when the remaining shoe is unusually rich in high cards. These deviations are a genuinely separate skill layered on top of basic strategy, not a replacement for it, and they only apply in the specific physical, minimally-shuffled shoe conditions where card counting itself is viable in the first place — conditions that don't exist on most software-dealt or continuously-shuffled online tables. For the overwhelming majority of players and the overwhelming majority of online blackjack formats, the standard basic strategy chart above, matched correctly to your table's rules, is the complete and correct answer without any count-based adjustment layered on top.

How much does deviating from the chart actually cost?

It's worth putting a rough number on why chart accuracy matters as much as this guide suggests. Individual deviations from basic strategy carry different costs depending on how close the underlying decision is — some cells (like 8,8 always splitting) are decisively correct, while others (like the soft-18-vs-2 stand) are much closer calls where a wrong guess costs only a small fraction of a percent in isolation. But these costs compound: a player making even a handful of small, consistent chart errors across a full session — say, always standing on hard 12 regardless of dealer upcard, or never doubling soft hands — commonly pushes their effective house edge up by half a percentage point or more compared to a player using the chart precisely. Across a large enough sample of hands, that difference is the gap between a well-played, low-edge game and a mediocre one, even without a single "big" mistake like ignoring a natural blackjack's payout rate or misreading a hard 16 as a stand.

How this chart relates to the rest of your strategy

A strategy chart covers hitting, standing, doubling, splitting, and surrender — but it's only one part of a complete approach to the game. Table and rule selection, bankroll management, and consistent bet sizing all matter alongside correct chart use, and none of them substitute for the others. Our complete blackjack strategy guide ties all of these pieces together into one framework, with this chart as the specific reference for the moment-to-moment decisions within a hand.

Bringing it together

A basic strategy chart is, in a real sense, the entire mathematical solution to blackjack compressed into three grids — every decision the game asks of you, answered in advance for a given rule set. Reading it correctly, matching it to your actual table, and building enough repetition that the correct action becomes automatic rather than a lookup is the single most concrete, learnable skill available to any blackjack player, regardless of stakes or experience level. Everything else covered across our blackjack guides — table selection, bankroll management, bet discipline — works alongside this chart, not instead of it, and none of those other habits can substitute for simply playing every hand according to the correct, rule-matched action shown above.

Frequently asked questions

Are basic strategy charts free to find? Yes — reputable gambling education resources publish basic strategy charts for the most common rule combinations at no cost. Just make sure the one you use matches your table's actual rules, since a chart built for the wrong rule set introduces small, avoidable errors.

Can I reference a strategy chart while playing online blackjack? Generally yes for software-dealt online blackjack, since there's no physical dealer to object. Live-dealer tables and physical casinos sometimes have their own policies around visible reference material, so it's worth checking a specific platform's rules if you plan to keep a chart open while playing live.

How long does it take to memorize basic strategy? With regular practice using a trainer tool, most players internalize the core hard-totals and soft-totals decisions within a few hours of focused repetition, with pairs and less common edge cases typically taking a bit longer to fully commit to memory.

Do I need a different chart for every single online casino I play at? Not necessarily every casino, but potentially every distinct rule set you encounter — many operators run multiple blackjack tables with different rules (deck count, soft-17 behavior, DAS), so it's the rule combination that determines the correct chart, not the operator itself.

What's the single most common mistake players make even after learning a chart? Using a memorized chart built for a different rule set than the one they're actually playing, particularly around the soft-17 dealer rule — it's a small enough difference to go unnoticed without directly comparing the two rule sets, but it introduces real, avoidable errors on specific hands.

Is it worth learning the exact percentages behind each chart cell, or just the actions themselves? For practical play, memorizing the correct action is what matters — the underlying percentages are useful for understanding why a cell is correct (which helps the chart stick in memory), but you don't need to recall the exact numbers to apply the chart correctly at the table.

Do single-deck and multi-deck charts differ by much? Not dramatically, but by enough to matter on specific cells — mainly some doubling and surrender decisions on hard totals in the 9–11 and 15–16 ranges, where a single-deck game's different card-removal effects shift the math slightly. The core shape of the chart (17+ stands, 8 or below hits, 8s and Aces always split) is identical regardless of deck count.

Can I print or save one of these tables for reference? Yes — there's nothing restricting personal reference use of a published basic strategy chart, and many players keep one saved or printed while learning. Just make sure to re-check it against your table's specific rules periodically, since a saved chart doesn't update itself if you switch to a table with different rules.

What should I do if my table's rules don't match any published chart I can find? Focus on the two rules with the largest impact — dealer soft-17 behavior and deck count — and use the closest available chart matching those two. The remaining rule differences (surrender availability, DAS) typically affect only a small number of cells, which you can adjust manually using the fallback logic described earlier (an "R/H" cell becomes "H" if surrender isn't offered, for example).

Is it a problem if I occasionally deviate from the chart on a close-call cell? Occasional deviation on a genuinely close cell (where two actions have nearly identical expected value) costs very little in isolation. The bigger risk is consistent deviation on the same cell every time it comes up, or deviating on decisive, high-impact cells like always-split pairs or hard 11 doubling, which compounds into a meaningfully worse effective house edge over a full session.