Blackjack — the odds, computed

Published return

99.44%measured

Computed at load from the game’s own constants — the same source the casino itself uses to pay. Nothing on this line is typed by hand.

Measured rather than closed-form, so it carries a sampling interval rather than being exact to the last decimal.

Not knowable from the outside

Blackjack’s edge is set by the rule set, so a single number would be meaningless.

• This build: dealer stands on all 17s · blackjack pays 3:2 · double on any two cards · no splits.
• Change one of those and the figure moves. 6:5 blackjack alone costs the player more than a full point.
• We publish what THIS rule set returns, measured. We will not quote the blackjack edge, because there is no such thing.
• A real table’s figure follows from its posted rules. Read them, then derive it the way we derived roulette.

The interactive odds explorer and bankroll simulator for Blackjack let you change the stake and see the expected value move, computed live from the same constants.

Open the Blackjack explorer →