On this page (7 sections)
RainyBet's casino calculators are free, browser-based tools that turn bonus terms, betting odds and rakeback rates into exact figures — turnover required, expected value, and the correct stake size — using formulas explained in full next to every result.
Why these calculators exist
Bonus copy is written to sound generous. A wagering requirement calculator, an EV calculator and a rakeback calculator exist to translate that copy into a number you can actually compare against the size of the offer. Every tool here runs entirely in your browser, shows its formula next to the result, and never invents an operator-specific figure — where a term is not published as a fixed, quotable number, you enter your own from your account screen instead.
That last point matters more than it sounds. A wagering multiplier, a VIP tier threshold or a base rakeback rate can differ by account and change without notice. A calculator that hard-codes a guess for any of those is worse than one that asks you for the real number.
Every calculator, what it answers
| Calculator | What it answers | Best for |
|---|---|---|
| Wagering requirement calculator | How much you must actually stake to clear a bonus, and whether the expected cost exceeds the bonus itself | Any deposit match, reload bonus or free spins offer with turnover attached |
| EV & Kelly criterion calculator | The expected value of a single bet, its edge as a percentage, and the mathematically correct stake size for a genuine positive-edge bet | Comparing odds, sanity-checking a staking plan, or confirming a casino game's edge is negative |
| Rainbet VIP calculator | What BOOST20's 20% rakeback boost is worth on your own turnover | Players comparing Rainbet's boost mechanic against a base rakeback rate |
| Stake VIP calculator | The gap between rakeback switched off and GETRAKEBACK unlocked | Players deciding whether entering a code before depositing is worth the two minutes |
| Roobet VIP calculator | What ROOSPINS' 20% cashback is worth across its exact 7-day window | Players planning to front-load turnover into a short time-boxed offer |
| BC.Game VIP calculator | Ongoing rakeback-style value against the qs57bd7r deposit match, wagering cost included | Players choosing between a one-off match and steady monthly play |
| Thrill VIP calculator | The real gap between the advertised up-to-70% ceiling and a realistic entry rate | Players who want the honest number behind a headline 'up to' figure |
Wagering requirement calculator
If an offer comes with a multiplier attached to a bonus, a deposit, or both, the wagering requirement calculator is the tool that matters. It turns the multiplier, the game weighting and the house edge into a single expected-value verdict — positive or negative, in plain numbers rather than marketing language. It is the most-used tool on this site for a reason: almost every deposit bonus lives or dies on this maths.
EV & Kelly criterion calculator
The EV & Kelly calculator works on any single bet you can describe as a win probability and a payout — not just casino games. It also runs the Kelly criterion, the formula for the bankroll fraction that maximises long-run growth on a genuinely positive-edge bet, and states plainly that Kelly's correct answer on a negative-edge casino game is to stake nothing at all.
VIP and rakeback calculators
Five brands, five different reward mechanics, one shared underlying formula: margin generated by turnover, multiplied by a rate. Rainbet's works as a boost multiplier, Stake's as an on/off switch, Roobet's inside a fixed 7-day window, BC.Game's compared against a one-off deposit match, and Thrill's as a gap between an advertised ceiling and a realistic entry rate. Reading rakeback mechanics side by side is the fastest way to see they are not remotely the same offer wearing different branding.
Run the same turnover through more than one
If you are choosing between two operators, the honest comparison is your own realistic monthly turnover through both VIP calculators, not the two headline percentages sitting next to each other.
Where the numbers come from
Every formula on this site is documented next to its calculator, and every one was checked against a reference implementation before publishing — see our methodology page for how we test. Figures like BOOST20's 20% boost, ROOSPINS' 20% rate, or qs57bd7r's 470% match are the operators' own published headline numbers. Figures like wagering multipliers and VIP tier thresholds, which are not published as fixed public figures, are always left for you to enter.
Licence, geo-restrictions and playing safely
Licensing. Calculators show expected value, not guarantees. Set a deposit limit and a session timer before you use any of these numbers to decide how much to play.
Your side of it. Crypto casinos settle fast, which is exactly what makes them easy to overplay. Before your first deposit at these operators, set a deposit cap and a session timer in the account settings — not in your head.
- Deposit limits and self-exclusion tools live in account settings, not support chat
- A losing session is not a signal to raise the stake — it is a signal to stop
- Bonus turnover targets are not a reason to keep playing past your limit
- Free, confidential help: BeGambleAware and Gambling Therapy
Frequently asked questions
Which casino calculator should I use first?
If you are looking at any offer with a wagering requirement — a deposit match, a reload bonus, free spins with turnover attached — start with the wagering requirement calculator. It answers the single question that decides whether an offer is worth taking.
Are these calculators specific to one casino?
The wagering and EV & Kelly calculators are pure maths and work for any operator. The five VIP calculators are framed around a specific brand's rakeback mechanic, but the underlying formulas are the same arithmetic either way.
Do these tools store or send my numbers anywhere?
No. Every calculation runs in your browser using plain JavaScript. Nothing you type is saved, transmitted or logged — refresh the page and the numbers are gone.
Why do some calculators ask me to type in my own operator figures?
Because we do not invent operator figures. Wagering multipliers, VIP tier thresholds and similar terms vary by account and change without notice, so those fields ask you to enter your own number from your account screen rather than trusting a guess.
Can these calculators tell me if a bonus will be profitable?
They tell you the expected value — the average outcome across many repetitions of the same situation. Any individual outcome can differ from that average in either direction. Expected value is the right way to compare offers; it is not a guarantee.
What is the difference between the wagering calculator and the VIP calculators?
The wagering calculator prices the cost of clearing a bonus that has strings attached. The VIP calculators price rakeback and cashback, which are usually paid without a wagering requirement at all — a structurally different kind of reward.
Is the EV & Kelly calculator only useful for casino games?
No — it works for any bet you can express as a win probability and a payout, including sports betting. Casino games are the clearest illustration of a negative-edge bet, which is exactly why the Kelly tool is honest about staking zero on them.