Basic strategy
Pick a chart, then tap a cell to see the expected value of every legal move.
Legend:HHitSStandDDoublePSplitXSurrender
| You \ Dealer | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | A |
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Tap any cell in the chart for the full breakdown.
Insurance
Never take it. The dealer completes blackjack about 31% of the time while insurance pays 2:1, so the expected value is negative (about −7.7% of the side bet) unless you count cards.