Three tools. One purpose: make mathematically optimal decisions automatic.
Input your hand and the dealer's upcard to see the mathematically optimal play. This tool uses standard Basic Strategy for multi-deck games (S17, DAS, 3:2).
Select your cards and the dealer's upcard to see the mathematically optimal move.
Note: This tool assumes a standard 6-deck game with S17, DAS, 3:2 payout, and late surrender. Always verify the specific rules at your table, as they can affect optimal strategy.
What is the dealer's bust probability with this upcard?
P(bust|upcard=6) = 0.42What is my EV if I stand vs. hit?
EV(hit) > EV(stand) → HitAm I making this decision based on math or instinct?
The house profits from instinct.
Adjust table rules to see the cumulative house edge. Input the rules you see at the table.
Our built-in tools cover basic strategy fundamentals. For deeper practice with advanced drill modes and speed training, Wizard of Odds offers professional-grade blackjack training software built on the same math.
Explore Wizard of Odds Trainer →External link — Wizard of Odds is an independent resource by Michael Shackleford.
Practice 100 hands. Track your accuracy score — how often you make the mathematically perfect move.