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Which calculators can help you understand online casinos?

InsideCasino.us has two free online casino calculators. The wagering calculator shows how much you must bet to clear a bonus and what that costs on average. The RTP calculator shows the average loss from a game's return to player. Both give long-run averages, not predictions of a single session.

By InsideCasino.us. Updated November 5, 2026.

InsideCasino.us may earn a commission when you visit a casino through a link on this site. It never changes a score: see how we score. Not legal advice. 21+ only.

Guides in this section

Wagering calculatorWork out the bets a bonus requires, what they cost on average and what the bonus is worth.RTP calculatorSee what a game costs on average from its return to player and how much you bet.

What can these calculators tell you?

The InsideCasino.us calculators show the average cost of a decision before you make it. The figures rest on simple sums, and you can check each one yourself:

  • Wagering calculator: bets needed to clear a bonus, their average cost and the average value of the bonus.
  • RTP calculator: total amount bet, the average paid back and the average loss.

Why do the calculators show averages?

Casino games are random, so no calculator can tell you what will happen in one session. An average tells you what a game costs over a very long run of bets. You can win or lose far more than that in a short run. See how games are tested for what these percentages mean.

Do the calculators store what you enter?

No. The sums run in your browser, and the calculators do not send or save what you enter. You do not need an account, and no calculator links to a casino or a sign-up page.

What are the rules in your state?

Each state sets its own online casino rules. Pick a state to see its status, its regulator and the date we last checked it.

Read next: Wagering calculator

Sources

Checked November 5, 2026. Regulator rules were read through the sources listed, and they can change. How we research.