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Double Down Madness blackjack simulator
Double Down Madness · 6 decks · H17 · double on any number of cards
How Double Down Madness differs from classic blackjack
- “Double” stays available after you hit: you can double on any number of cards, also after a split. You get exactly one more card for the doubled bet.
- No surrender. Pairs split up to 4 hands; aces split once and get one card each.
- Your 21 does not win automatically and there are no 21 bonuses. Blackjack pays 3:2; against a dealer blackjack it is a push.
- Otherwise classic: 6 decks of 52 cards, dealer hits soft 17, the dealer checks for blackjack.
Play chips
Not money. Nothing here can be won or cashed out.
Your decisions
matched basic strategy
Cost of mistakes
average cost of plays that differ from the chart
Session
"Expected" is the house edge for these rules times the amount bet. A result above it is the short-run spread; the average keeps going down.
Basic strategy for this table
The cell for your current decision is outlined while you play.
Rules of this table
Double Down Madness rules vary by casino. These are the rules used for the game and every number on this page.
| Rule | What it means |
|---|---|
| Double on any number of cards | You can double after you have taken more cards, and after a split. You get one more card for the doubled bet. In classic blackjack you can double down only on your first two cards. |
| Standard decks | 6 decks of 52 cards, dealer hits soft 17 and checks for blackjack. |
| Blackjack pays 3:2 | A blackjack against a dealer blackjack is a push. Your 21 does not win automatically. |
| Splits | Up to 4 hands; aces split once and get one card each. No surrender. |
When to double with three or more cards
With three cards in your hand, the chart below doubles in these cells (6 decks, dealer hits soft 17). In the chart, a cell like H/D3 means hit with two cards, double from three cards on.
- Hard 9 against 3–6
- Hard 10 against 2–9
- Hard 11 against 2–A
- Soft 13 (A,2 and more cards) against 6
- Soft 14 (A,3 and more cards) against 5–6
- Soft 15 (A,4 and more cards) against 5–6
- Soft 16 (A,5 and more cards) against 4–6
- Soft 17 (A,6 and more cards) against 3–6
- Soft 18 (A,7 and more cards) against 3–6
- Soft 19 (A,8 and more cards) against 6
The extra doubles lower the house edge, but they also put more money on the table in each of those hands.
How the numbers are worked out
An exact calculation over the cards in the shoe for every number of cards in your hand, checked by an independent simulator of our own over 4 billion rounds (within its margin of error). Split hands are treated as independent.
For standard blackjack with the rules you choose, play the classic blackjack simulator.
Every game on this site side by side, with its rules and house edge: types of blackjack.
Keys: H hit, S stand, D double, P split, R surrender, Enter deal, F full screen.