Bankroll calculator for crash games
Enter a starting bankroll, a flat bet size, a number of rounds and the multiplier you plan to cash out at. The calculator runs the math for a generic crash-style payout model (like Chicken Road 2, Jumper or Aviator-style games) entirely in your browser — nothing is sent anywhere.
Editorial Team · September 09, 2026
What this tool assumes
Crash games pay out on a simple rule: you win if the multiplier keeps climbing past the point where you press cash out, and you lose your bet if it "crashes" first. For a game designed around a fixed return-to-player (RTP), the standard model used across the industry sets the probability of surviving to a multiplier of m at RTP ÷ m. That single rule is what drives every number below — we do not have a live feed of any specific operator's RTP, so the assumed RTP field is yours to set. Leave it at the 97% default only if you have no better figure; check the operator's own disclosure or our testing methodology for how we verify RTP claims on games we've reviewed.
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How the numbers are calculated
Two separate calculations run every time you press Calculate, both live in your browser:
- Exact expected value. Win probability per round = min(1, RTP ÷ cashout). Expected profit per round = bet × (RTP − 1), which is constant regardless of your cashout target — this is the defining property of a fair crash curve. Multiply by the number of rounds for the expected result, and divide bankroll by the per-round expected loss for the "rounds until zero" line.
- Monte Carlo simulation. The calculator runs 3,000 independent simulated sessions using
Math.random(), betting flat stakes round by round until either the bankroll can't cover the next bet or the round count is reached. From those 3,000 outcomes it reports the share that went bust, the average rounds survived, and the 5th/50th/95th percentile ending bankroll.
The exact math matches the same Monte-Carlo approach we use to verify RTP claims on a full review. If you want to sanity-check a specific title's numbers first, our Chicken Road 2 review and our list of tested casinos are good starting points.
What this tool does not do
- It does not store, transmit or log anything you type — there is no form submission, no analytics event tied to your inputs, and no server involved in the calculation.
- It does not know the real RTP of any specific casino's build of any game. You supply that assumption.
- It cannot tell you whether you will win or lose a specific session — it estimates ranges of outcomes across many simulated sessions, not a forecast.