Calculate expected value, house edge, and win probability for any casino game or sports bet.
Standard published house edges for a single-number/pass-line/basic-strategy bet at typical rules. Real numbers vary by casino, table rules, and (for blackjack) how closely you play basic strategy. Slot edges vary widely by machine and are shown here as a representative average — check your casino for actual RTP where published.
The house always has an edge. Blackjack: ~0.5% edge (best odds in the casino). Roulette: 5.26%. Slots: 2-15%. Sports betting: 4-6% average vig.
A negative expected value means you will lose money over time — it is mathematically guaranteed with enough bets. The calculator above shows you exactly how much.
Set a hard budget before you play. Never chase losses. Gambling should be entertainment, not income.
If gambling is causing problems: National Council on Problem Gambling | 1-800-522-4700