Updated 2026-07-22 · 8 decks · S17 · DAS · methodology
Soft 18 (A,7) vs dealer 4: the verdict
The math is in: double. Against a dealer 4, this hand is strong enough to put double the money on the table.
The numbers
| Action | Win | Push | Lose | EV per $1 |
|---|---|---|---|---|
| Double | 52.1% | 7.6% | 40.3% | +0.237 |
| Stand | 52.5% | 12.6% | 34.9% | +0.176 |
| Hit | 52.1% | 7.6% | 40.3% | +0.119 |
Why double is correct
Doubling wins almost exactly as often as hitting (52.1% vs 52.1%) — the difference is you have twice the money riding on a favorable spot. Against a dealer 4 (bust chance 39.4%), that extra bet is the whole point: EV +0.237 doubled beats +0.119 hit.
For context, a dealer 4 finishes on 17–20 about 49.4% of the time, on 21 11.1%, and busts 39.4%. Those dealer outcomes are the same no matter what you hold — the whole game is choosing the action whose distribution fits them best.
What the mistake costs
Choosing stand instead of double costs about $153 per 100 such hands at $25 a hand (−0.061 EV per dollar). The genuinely expensive error here is hit: −0.119 per dollar, or roughly $296 per 100 hands at the same stakes.
Does the rule set change it?
No — double holds across every common configuration: Vegas Strip, Atlantic City with late surrender, H17 games and European no-hole-card tables all agree here.
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soft 18 against other dealer cards:
Other key hands vs a dealer 4: