Crash game math: how often each multiplier actually hits
A plain-numbers guide to the odds behind any crypto Crash game, so you know what a 2x, 10x or 100x target really costs before you set it.
In a typical crash game, the chance a round reaches your target is the game's RTP divided by the target. At 99% RTP that's about 49.5% for 2x, 9.9% for 10x and 0.99% for 100x. Every target carries the same house edge, so no cash-out point and no betting system, martingale included, turns Crash into a winning game over time.
Crash looks like a game of nerve: the multiplier climbs, and you decide when to jump. Underneath, it's a fixed probability table. The crash point for each round is set before anyone bets, and in the standard model the chance of reaching any multiplier follows one simple rule. Once you know that rule, you can work out the odds of any cash-out target, how long a losing run is likely to be, and why betting systems don't help. For how Gamdom's own version works and how to verify a round, see our Gamdom Crash guide.
The one formula behind Crash odds
Most crypto crash games are built so that the chance a round reaches at least multiplier x is:
P(reach x) = RTP / x
RTP (return to player) is 1 minus the house edge. A game with a 1% edge has an RTP of 0.99, so the chance of reaching 2x is 0.99 / 2 = 49.5%. The missing slice at the bottom is the instant crash: at 99% RTP, about 1% of rounds bust at 1.00x before anyone can cash out. That's where the house edge lives.
Operators implement this differently. Some add a separate fixed chance of an instant bust, some use a different edge, and some cap the maximum multiplier or maximum profit. The formula is the standard model, not a promise about any one site. Gamdom's help center says its Originals run at around 99% RTP but gives no Crash-specific figure and no Crash formula; CryptoSlate reports BC.Game's Crash at 99% RTP. Always check the game's info panel.
How often each target hits
Chance that a single round reaches your cash-out target, at 99% RTP (a 1% edge) and, for comparison, 97% RTP (a 3% edge):
Two things jump out. First, low targets aren't "safe": a 1.10x target still loses about one round in ten. Second, the gap between a 1% and 3% edge looks tiny per round but is three times the cost over the same amount wagered.
Why every target has the same house edge
Multiply the chance of hitting a target by what it pays and you get the expected return per unit bet. At 2x: 0.495 × 2 = 0.99. At 10x: 0.099 × 10 = 0.99. At 100x: 0.0099 × 100 = 0.99. Whatever you aim for, you get back 99 cents per dollar wagered on average, and the house keeps 1 cent.
What changes with the target is variance, not value. A 1.5x target gives you many small wins and a loss every three rounds or so. A 10x target means long dry spells: at 99% RTP the chance of going 23 rounds without a single 10x is about 9%, and going 50 rounds without one still happens about once in 180 tries. At 100x, you'll miss for 100 straight rounds about 37% of the time. If your bankroll can't ride out those runs, the target is too high for it.
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Martingale, worked through
Martingale is the most common Crash "strategy": aim for 2x, and after every loss double your bet so the next win recovers everything plus one base bet. Here's what it looks like at 99% RTP with a $1 base bet.
So with a $1,023 bankroll, martingale grinds out about $1 per win, then has a coin-flip-ish chance over a long session of losing everything in one streak. The streak doesn't have to be ten: a max-bet limit on the site can stop the doubling earlier. The expected value never moves from 99 cents per dollar wagered, because each round is independent and the crash point doesn't "owe" you a 2x after a run of low ones. Martingale only reshapes losses from many small ones into one rare, large one.
Other systems (reverse martingale, Fibonacci, "waiting for a run of low crashes" before betting) fail for the same reason. Past rounds don't change the next round's odds.
What a session actually costs
The useful number isn't the odds of one round, it's the edge times how much you wager. At a 1% edge, $10 bets over 500 rounds is $5,000 wagered and an expected loss of about $50. At 3%, the same session costs about $150 on average. Real results will swing far above and below that, which is why sessions sometimes end up, but the average catches up with volume. Crash rounds are short, so volume builds faster than it feels.
Rakeback works on the same number. It returns part of the edge on what you wager, so it shrinks the average cost of a session, but it can't turn it positive unless the rakeback rate beats the edge. Gamdom doesn't publish its rakeback formula; our rakeback guide covers what it does say.
Practical takeaways
- Check the RTP in the game info before you play. A 3% edge costs three times as much as a 1% edge per dollar wagered.
- Pick your cash-out target for the swings you can handle, not to improve your odds. They're the same at every target.
- Set auto cash-out so the decision is made before the round starts, and a session budget you won't top up.
- Treat any "system" that promises a steady profit as martingale in disguise.
- Provably fair proves a round wasn't changed after you bet; it doesn't remove the edge. Our provably fair explainer shows how to check a round.
Sources
- Gamdom help center: Gamdom Originals (updated September 2, 2026)
- CryptoSlate: BC.Game Casino Review (updated October 9, 2026), for BC.Game Crash RTP
- Probabilities, streak odds and martingale figures on this page are calculated by GambleClear from the standard model P(reach x) = RTP / x, assuming independent rounds.
Frequently asked questions
What are the odds of hitting 2x in Crash?
In a crash game with 99% RTP, the round reaches 2.00x about 49.5% of the time. The general rule is RTP divided by your target: 0.99 / 2 = 0.495. At a 97% RTP game it drops to about 48.5%. Check the game's own info panel, because operators set their own edge.
Is there a best cash-out multiplier in Crash?
Not in terms of expected value. In the standard crash model, every target returns the same RTP over time, because a higher target pays more exactly in proportion to how much less often it hits. Low targets give frequent small wins and rare losses; high targets give rare big wins and long losing runs. Pick for how much swing you can stand, not to beat the edge.
Does martingale work in Crash?
No. Doubling after every loss at a 2x target wins one base bet per cycle, but ten straight losses (about a 1 in 927 chance at 99% RTP) cost 1,023 base bets. Over 1,000 rounds there is roughly a 41% chance that streak happens at least once. The edge per bet never changes, so martingale only trades many small wins for a rare, much larger loss.
What is the house edge in Gamdom Crash?
Gamdom's help center doesn't publish a Crash-specific RTP or house edge. It says its Originals run at around 99% RTP, but that note doesn't name Crash. Many crypto Crash games run at 99% RTP (1% edge); check the game info on any site before you play.
Can rakeback make Crash profitable?
Not on its own. Rakeback returns part of the house edge on what you wager, so it shrinks your expected loss but doesn't turn it positive unless the rakeback rate is larger than the edge, which casino programs aren't designed to allow. Gamdom doesn't publish its rakeback formula.
Related: how Gamdom Crash works, provably fair, explained and the crypto casino glossary. Gambling loses money over time on average; if it's stopped being fun, see our responsible gambling page.