Casino math tools

Free calculators that show the real math behind casino games and bonuses: odds, RTP, house edge and how long a budget lasts. They show what you are signing up for — no tool can beat the house edge.

Plinko calculator

Exact odds of every slot for 8–16 rows, the 1-in-N chance of the edge, and the RTP and volatility of any payout table.

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Mines calculator

Chance to survive every click for 1–24 mines, the fair multiplier and the payout at your RTP.

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Bonus wagering calculator

How much you must bet to clear a bonus and what it is expected to cost you.

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Bankroll calculator

How long your budget lasts at a given bet, RTP and volatility, with 2,000 simulated sessions.

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Martingale calculator

How many losses in a row your bankroll survives with the doubling system, and how likely that streak is.

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Crypto casino finder

Answer 4 questions about coin, KYC and country to get casinos that match, from sourced facts.

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18+ · Responsible gambling