Blackjack Calculator

Free, no-signup blackjack math tools: a session simulator, a basic-strategy decision calculator, a house-edge calculator, and a payout calculator — all driven by the same rule-set-aware engine.

Blackjack Simulator

Play thousands of simulated hands under any rule set and see your realized edge vs the theoretical house edge.

Blackjack Calculator

Enter your hand and the dealer upcard, get the mathematically optimal move — plus a dynamically generated strategy chart for your exact rules.

House Edge Calculator

See exactly how deck count, dealer soft-17 rules, double-after-split, surrender, and payout ratio each move the house edge.

Payout Calculator

Bet size and hand type in, exact payout out — including the real cost of 6:5 vs 3:2 blackjack payouts.