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Tools that do the math.

Three calculators built around the questions our editors get most: will this bonus clear in time, how long will a bankroll last, and when will the withdrawal actually arrive. Server-side maths — results work without JavaScript and the URL is the receipt.

3 calculators No sign-up Shareable URL No tracking
01

Bankroll planner

Pick a starting bankroll, bet size and RTP. We return your expected loss, survival probability and a recommended max bet so a session does not end on spin three.

Sizing · risk Open tool →
02
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Wagering calculator

Enter the bonus, the multiplier and the game weighting. We return total turnover required, estimated time to clear and the bonus EV after the house edge has taken its cut.

Clearance · EV Open tool →
03

Payout-speed estimator

Choose deposit and withdrawal method, KYC status, VIP tier and the casino's stated payout SLA. We return pessimistic, median and best-case payout times so you can plan around real cash-out windows.

Cash-out · SLA Open tool →
Why we built these

Casino marketing
shows the headline.
Players need the maths.

A StealMyBonus editorial project · updated Jun 2026

Every offer we review is sold the same way: a big headline, a small footnote, and a wagering multiplier hiding the real cost of the deal. The headline tells you what you might get. It does not tell you the turnover you owe, the hours you need at the screen, or the bet caps that throttle how fast you can clear it. We built these calculators because our reviewers were doing the same arithmetic on the back of an envelope for every casino we cover.

Each tool is server-side first: enter numbers, submit the form, read the result in the URL. JavaScript is optional. The maths is the same maths our editors use to grade offers — explained in plain English at the bottom of every calculator so you can check our working. Nothing is tracked, no account is required, and the share URL contains every input so a friend, a forum post, or a future you can re-run the same numbers without retyping a digit.

InputsRound-trip via GET
ComputeServer-side, no JS required
PrivacyNo cookies, no tracking