Learn the reason behind the move
Double-deck Blackjack Strategy & Charts
Double-deck blackjack strategy needs its own chart. Compare S17 and H17 decisions, double-after-split options and late-surrender fallbacks.
Last updated:
Double-deck rules before the chart
2 × 52 = 104 cards
Sample ranks in every standard deck
A natural uses two initial cards
These tables use 2 standard decks, a dealer peek, 3:2 blackjack and doubling on any initial two cards. They show total-dependent strategy, with conditional actions for double after split (DAS) and late surrender. They are not the homepage’s four-to-eight-deck calculator.
Read the pair row first when splitting is permitted; otherwise use the hand total. A two-card natural is settled under the blackjack rule. These charts do not model count-based deviations or a depleted shoe.
How to read the conditional actions
Dealer upcard
Player hand
Double, otherwise stand
If this table permits the double, take one card; otherwise keep soft 18.
Each row groups dealer upcards by action. “Double, otherwise hit” applies when a double is legal; if it is not, hit. “Double, otherwise stand” instead falls back to stand. A late-surrender instruction falls back to the other named action when surrender is unavailable.
DAS means double after split. A conditional split with DAS becomes the listed hit, stand or double when DAS is prohibited. Treat aces and split-ace draw restrictions separately. Decline insurance and even money under basic strategy.
What changes with two decks?
Dealer upcard
Player hand
Double, otherwise hit
Use the page’s S17 reference.
Two decks contain 104 cards before play. In these charts, hard 9 doubles against 2 and hard 11 doubles against an ace, unlike the four-to-eight-deck S17 chart. Pair and soft-hand decisions also need the correct table.
Soft 18 against an ace under S17 is a very close case. The displayed reference uses hit for the initial two-card hand; composition and later draws can change the best action. Do not apply this starting-hand convention as a universal multi-card rule.
Double-deck S17: hard totals
Dealer upcard
Player hand
Double, otherwise hit
2 decks · S17 · dealer peek · 3:2 · double any initial two cards · DAS and late-surrender conditions shown in each row.
| Your hand | Action by dealer upcard |
|---|---|
| 4–8 | Hit vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
| 9 | Double, otherwise hit vs 2, 3, 4, 5, 6; Hit vs 7, 8, 9, 10, ace. |
| 10 | Double, otherwise hit vs 2, 3, 4, 5, 6, 7, 8, 9; Hit vs 10, ace. |
| 11 | Double, otherwise hit vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
| 12 | Hit vs 2, 3, 7, 8, 9, 10, ace; Stand vs 4, 5, 6. |
| 13–14 | Stand vs 2, 3, 4, 5, 6; Hit vs 7, 8, 9, 10, ace. |
| 15 | Stand vs 2, 3, 4, 5, 6; Hit vs 7, 8, 9, ace; Late surrender, otherwise hit vs 10. |
| 16 | Stand vs 2, 3, 4, 5, 6; Hit vs 7, 8; Late surrender, otherwise hit vs 9, 10, ace. |
| 17–21 | Stand vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
Double-deck S17: soft hands
Dealer upcard
Player hand
Hit
Initial two-card soft 18.
2 decks · S17 · dealer peek · 3:2 · double any initial two cards · DAS and late-surrender conditions shown in each row.
| Your hand | Action by dealer upcard |
|---|---|
| A,2 | Hit vs 2, 3, 4, 7, 8, 9, 10, ace; Double, otherwise hit vs 5, 6. |
| A,3 | Hit vs 2, 3, 7, 8, 9, 10, ace; Double, otherwise hit vs 4, 5, 6. |
| A,4 | Hit vs 2, 3, 7, 8, 9, 10, ace; Double, otherwise hit vs 4, 5, 6. |
| A,5 | Hit vs 2, 3, 7, 8, 9, 10, ace; Double, otherwise hit vs 4, 5, 6. |
| A,6 | Hit vs 2, 7, 8, 9, 10, ace; Double, otherwise hit vs 3, 4, 5, 6. |
| A,7 | Stand vs 2, 7, 8; Double, otherwise stand vs 3, 4, 5, 6; Hit vs 9, 10, ace. |
| A,8–10 | Stand vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
Double-deck S17: pairs
Dealer upcard
Player hand
DAS: split
- No DAS
- Hit
2 decks · S17 · dealer peek · 3:2 · double any initial two cards · DAS and late-surrender conditions shown in each row.
| Your hand | Action by dealer upcard |
|---|---|
| 2,2 | Split with DAS, otherwise hit vs 2, 3; Split vs 4, 5, 6, 7; Hit vs 8, 9, 10, ace. |
| 3,3 | Split with DAS, otherwise hit vs 2, 3; Split vs 4, 5, 6, 7; Hit vs 8, 9, 10, ace. |
| 4,4 | Hit vs 2, 3, 4, 7, 8, 9, 10, ace; Split with DAS, otherwise hit vs 5, 6. |
| 5,5 | Double, otherwise hit vs 2, 3, 4, 5, 6, 7, 8, 9; Hit vs 10, ace. |
| 6,6 | Split vs 2, 3, 4, 5, 6; Split with DAS, otherwise hit vs 7; Hit vs 8, 9, 10, ace. |
| 7,7 | Split vs 2, 3, 4, 5, 6, 7; Split with DAS, otherwise hit vs 8; Hit vs 9, 10, ace. |
| 8,8 | Split vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
| 9,9 | Split vs 2, 3, 4, 5, 6, 8, 9; Stand vs 7, 10, ace. |
| 10,10 | Stand vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
| A,A | Split vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
Double-deck H17: hard totals
Dealer upcard
Player hand
Double, otherwise hit
2 decks · H17 · dealer peek · 3:2 · double any initial two cards · DAS and late-surrender conditions shown in each row.
| Your hand | Action by dealer upcard |
|---|---|
| 4–8 | Hit vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
| 9 | Double, otherwise hit vs 2, 3, 4, 5, 6; Hit vs 7, 8, 9, 10, ace. |
| 10 | Double, otherwise hit vs 2, 3, 4, 5, 6, 7, 8, 9; Hit vs 10, ace. |
| 11 | Double, otherwise hit vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
| 12 | Hit vs 2, 3, 7, 8, 9, 10, ace; Stand vs 4, 5, 6. |
| 13–14 | Stand vs 2, 3, 4, 5, 6; Hit vs 7, 8, 9, 10, ace. |
| 15 | Stand vs 2, 3, 4, 5, 6; Hit vs 7, 8, 9; Late surrender, otherwise hit vs 10, ace. |
| 16 | Stand vs 2, 3, 4, 5, 6; Hit vs 7, 8; Late surrender, otherwise hit vs 9, 10, ace. |
| 17 | Stand vs 2, 3, 4, 5, 6, 7, 8, 9, 10; Late surrender, otherwise stand vs ace. |
| 18–21 | Stand vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
Double-deck H17: soft hands
Dealer upcard
Player hand
Hit
Initial two-card soft 18.
2 decks · H17 · dealer peek · 3:2 · double any initial two cards · DAS and late-surrender conditions shown in each row.
| Your hand | Action by dealer upcard |
|---|---|
| A,2 | Hit vs 2, 3, 4, 7, 8, 9, 10, ace; Double, otherwise hit vs 5, 6. |
| A,3 | Hit vs 2, 3, 4, 7, 8, 9, 10, ace; Double, otherwise hit vs 5, 6. |
| A,4 | Hit vs 2, 3, 7, 8, 9, 10, ace; Double, otherwise hit vs 4, 5, 6. |
| A,5 | Hit vs 2, 3, 7, 8, 9, 10, ace; Double, otherwise hit vs 4, 5, 6. |
| A,6 | Hit vs 2, 7, 8, 9, 10, ace; Double, otherwise hit vs 3, 4, 5, 6. |
| A,7 | Double, otherwise stand vs 2, 3, 4, 5, 6; Stand vs 7, 8; Hit vs 9, 10, ace. |
| A,8 | Stand vs 2, 3, 4, 5, 7, 8, 9, 10, ace; Double, otherwise stand vs 6. |
| A,9–10 | Stand vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
Double-deck H17: pairs
Dealer upcard
Player hand
DAS: split
- No DAS
- Hit
2 decks · H17 · dealer peek · 3:2 · double any initial two cards · DAS and late-surrender conditions shown in each row.
| Your hand | Action by dealer upcard |
|---|---|
| 2,2 | Split with DAS, otherwise hit vs 2, 3; Split vs 4, 5, 6, 7; Hit vs 8, 9, 10, ace. |
| 3,3 | Split with DAS, otherwise hit vs 2, 3; Split vs 4, 5, 6, 7; Hit vs 8, 9, 10, ace. |
| 4,4 | Hit vs 2, 3, 4, 7, 8, 9, 10, ace; Split with DAS, otherwise hit vs 5, 6. |
| 5,5 | Double, otherwise hit vs 2, 3, 4, 5, 6, 7, 8, 9; Hit vs 10, ace. |
| 6,6 | Split vs 2, 3, 4, 5, 6; Split with DAS, otherwise hit vs 7; Hit vs 8, 9, 10, ace. |
| 7,7 | Split vs 2, 3, 4, 5, 6, 7; Hit vs 8, 9, 10, ace. |
| 8,8 | Split vs 2, 3, 4, 5, 6, 7, 8, 9, 10; Late surrender, otherwise split vs ace. |
| 9,9 | Split vs 2, 3, 4, 5, 6, 8, 9; Stand vs 7, 10, ace. |
| 10,10 | Stand vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
| A,A | Split vs 2, 3, 4, 5, 6, 7, 8, 9, 10, ace. |
Printable double-deck strategy reference
Use your browser’s Print command to print these tables or save them as a PDF. Keep the rule line and the action wording with the hand rows. The separate PDF on our multi-deck chart page is not a substitute for this reference.
