Bankroll Calculator
Bankroll Calculator
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Results are mathematical expectations based on 96.5% RTP and 174-spin average bonus frequency. Actual outcomes vary due to high volatility.
Results are mathematical expectations based on 96.5% RTP and 174-spin average bonus frequency. Actual outcomes vary due to high volatility.
The default RTP is 96.5%, one of the higher returns among 'Book of' style slots. A reduced variant at 94.5% exists and is used by some casino operators. The active RTP is displayed on page 3 of the in-game rules, accessible via the information icon in the bottom left corner of the game screen.
The free spins feature triggers on average once every 174 base game spins. At a $1 stake that represents approximately $174 in expected wagering per bonus. Due to high volatility, individual sessions frequently deviate from this average — dry stretches of 300 or more spins occur in roughly 13% of sessions.
The Bonus Buy at 100× stake carries the same 96.5% RTP as base game play — the expected loss per $100 purchase is $3.50. It does not improve the mathematical return over organic triggering. Its practical value is eliminating the average 174-spin wait for players who want the bonus round experience without the base game grind.
The documented maximum win is 5,500× the stake. Achieving it requires the free spins bonus to trigger with John Hunter selected as the expanding symbol, followed by full-reel coverage of John Hunter across all five reels on multiple paylines. The probability of the 5,500× outcome is approximately 1 in 1,000,000,000 spins.
Yes. Landing three or more book scatter symbols during the free spins round awards an additional 10 free spins with the same expanding symbol in play. There is no limit on the number of retriggers within a single bonus session.
No. The expanding symbol pays according to its paytable value even when the covered reels are non-adjacent. For example, expanding symbols on reels 1, 3, and 5 form a valid winning combination. This non-adjacency rule is the primary mechanic enabling large bonus payouts.
Book of Dead by Play'n GO operates at 96.21% RTP versus Book of Tut's 96.5% default. Both use the same expanding symbol free spins mechanic. Book of Tut adds a Bonus Buy option at 100× stake; Book of Dead does not have an equivalent feature. Maximum win potential is similar — Book of Dead reaches 5,000× versus 5,500× for Book of Tut.