Blackjack House Edge Calculator
Set the rules printed on the felt and see what the table really charges — as a percentage and in dollars per hour at your stakes. Assumes perfect basic strategy; add 2–4% if you're guessing.
What each rule is worth
| Rule change | Effect on house edge |
|---|---|
| Blackjack pays 6:5 instead of 3:2 | +1.39% |
| 8 decks → single deck | −0.48% |
| Dealer stands on soft 17 (S17) | −0.20% |
| No double after split | +0.14% |
| Late surrender offered | −0.08% |
| Resplit aces allowed | −0.08% |
| Double on 10–11 only | +0.18% |
| You play by feel instead of the chart | +2% or worse |
Two takeaways: the payout line dwarfs everything else, and "single deck!" advertising means nothing if it comes with 6:5. The cheapest seat in the house is a 3:2 shoe game played with the chart.
Frequently asked questions
Where do these numbers come from?
They're the standard published rule effects from combinatorial analysis of the full game, rounded to the basis point, applied to a 6-deck H17 DAS 3:2 baseline of 0.62% — the same baseline our trainer's exact odds engine plays. Tenths of a basis point vary slightly by source and rule interactions; the rounded picture doesn't.
Is a 0.6% house edge actually beatable?
Not by bet sizing — no betting system changes it. Card counters beat it by betting more only when the remaining shoe favors them; everyone else should treat ~0.6% as the price of the entertainment.
Why does the number of decks change the edge?
Fewer decks mean more blackjacks for you, more favorable doubles, and bigger swings from card removal. The effect shrinks fast: 1→2 decks costs ~0.29%, but 6→8 decks costs just ~0.02%.