Enter your budget and stake to see how many spins you can afford, your expected loss based on Book of Aztec's RTP, and the rough probability of hitting the bonus at least once in your session.
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How Long Will Your Money Last?
Calculator uses 95.09% default RTP. If you're playing at a casino with the 97.63% version, your expected loss per session is approximately 22% lower.
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Frequently Asked Questions
Does the expanding symbol have to be on consecutive reels to pay?
No — that's the whole point of the mechanic. The expanding symbol pays on all active lines regardless of whether the reels are adjacent. Lady on reels 1, 3 and 5 counts as a full 5-of-a-kind win on all 10 lines. This is why the bonus has such high ceiling potential.
Why does my casino show a different RTP than 95.09%?
Book of Aztec has a variable RTP range from 90.57% to 97.63%. Amatic allows operators to configure which version runs. If your casino shows something different — lower or higher — that's their configuration choice. Some casinos publish their Amatic RTP settings in their help sections.
Can free spins retrigger, and is there a cap?
Yes, and no cap. Every time 3 or more Books land during the bonus round, you get another 10 spins added. One documented session on YouTube accumulated 70 spins in a single bonus through repeated retriggering. In practice most bonuses run 10-30 spins.
Is Book of Aztec the same as Book of Ra?
Mechanically very similar — same expanding symbol concept, same 10-payline structure, same Book wild/scatter dual role. Book of Ra is made by Novomatic; Book of Aztec is Amatic's version. The main differences are the theme (Aztec vs Egyptian) and the protagonist (female explorer vs male adventurer). Most players familiar with one can jump straight into the other.
What's the difference between Book of Aztec and Book of Aztec Select?
Select (2020) lets you choose your expanding symbol from 9 face-down books instead of getting one randomly. It also has higher RTP (97.63%), lower minimum bet ($0.10 vs $1.00), and better graphics. The original has adjustable paylines (1-10); Select fixes them at 10.