Tool · Odds · Risk
Aviator Calculator: Odds, Expected Loss and Martingale Risk
How often does the plane reach 2x? What does an evening of $1 bets cost on average? How big is the bankroll that Martingale really needs? This calculator answers these questions with the math behind Aviator’s 97% RTP.
It shows averages and chances, not predictions. Every round is random and independent, so no calculator, app or system can tell you where the next one ends.
- RTP
- 97%
- Per Spribe
- Reaching 2.00x
- ≈ 48.5%
- Under a 97% RTP model
- Average loss
- $0.03 per $1
- At any cash-out target
Aviator Odds and Risk Calculator
Change any value and the results update as you type. The defaults show a common setup: $1 bets cashed out at 2.00x.
Chance to reach a multiplier
Enter a cash-out target to see how often a round gets there and how long a run of misses can be.
Approximate chances under a 97% RTP model (0.97 divided by the target). Spribe states a 97% RTP but doesn’t publish the odds of each multiplier.
Expected result over many rounds
Enter a stake, a target and a number of rounds to see what the 3% house edge costs on average.
A long-run average, not a prediction. A real session can end well above or well below it, and the target doesn’t change the average loss.
Martingale risk
Martingale raises the stake after every loss so that one win recovers it all plus the base profit. Enter your base stake and bankroll to see where the doubling stops.
| Bet in the cycle | Stake | Total lost if it loses | Chance to get here | Covered by the bankroll |
|---|---|---|---|---|
| 1 | $1 | $1 | 100% | Yes |
| 2 | $2 | $3 | 51.5% | Yes |
| 3 | $4 | $7 | 26.5% | Yes |
| 4 | $8 | $15 | 13.7% | Yes |
| 5 | $16 | $31 | 7.03% | Yes |
| 6 | $32 | $63 | 3.62% | Yes |
| 7 | $64 | $127 | 1.87% | No, the bankroll runs out |
Our calculation under the 97% RTP model, with stakes rounded up to the cent and the bankroll kept the same between cycles. Every bet still loses 3% of its stake on average: Martingale changes how the losses come, not how big they are on average. Casino max bet limits can stop the doubling even sooner.
How the Calculator Works
Aviator’s RTP (return to player) is 97%, as stated on Spribe’s game page. RTP is the share of all stakes that goes back to players over a very long run: $97 of every $100 wagered, on average.
Spribe doesn’t publish the chance of each multiplier. By design of crash games, the expected return is the same whatever target you pick. If that holds for Aviator, the chance of reaching a multiplier x is about 0.97 divided by x. Our calculator uses this model. Treat its numbers as approximate, not as official odds.
| Cash Out target | Chance per round | About 1 in | Average result per $1 |
|---|---|---|---|
| 1.50x | 64.7% | 1.5 rounds | −$0.03 |
| 2.00x | 48.5% | 2.1 rounds | −$0.03 |
| 5.00x | 19.4% | 5.2 rounds | −$0.03 |
| 10.00x | 9.7% | 10 rounds | −$0.03 |
| 100.00x | 0.97% | 103 rounds | −$0.03 |
| 1,000.00x | 0.097% | 1,031 rounds | −$0.03 |
Our calculation from the 0.97/x model. Spribe states a 97% overall RTP but hasn’t published the distribution of multipliers.
The last column is the key. A low target wins often and pays little, a high target wins rarely and pays a lot, and both lose about 3 cents per dollar on average. The calculator just moves you along this table.
The 3% House Edge
The house edge is the part of the RTP that the casino keeps: 100% − 97% = 3%. It applies to every bet, so the average cost grows with your total stake, not with your choice of target. One hundred $1 bets cost about $3 on average; one thousand cost about $30.
“On average” is doing a lot of work here. In 100 rounds at 2.00x, you might cash out 40 times or 60 times, and the session can end well up or well down. The expected result only shows where many such sessions cluster. It is a long-run price tag, not a forecast for tonight.
Two bets per round don’t dodge the edge either. With $1 on each panel, your turnover doubles, and so does the average loss: about $0.06 per round instead of $0.03.
Every Round Is Independent
Aviator is a Provably Fair game. Before a round, the casino’s server seed is fixed, and only its hash is shown. When the round starts, that seed is combined with the seeds of the first three players to bet and hashed with SHA-512. The result of the hash sets the multiplier where the plane flies away.
Each round uses new seeds. Past multipliers aren’t part of the formula, and neither is the time of day or the number of players online. That is why the calculator gives the same chance for every round: the game has no memory.
It is also why predictor apps can’t work. The seeds that decide the next round aren’t known before it starts. Our Aviator predictor guide explains how these apps and signal groups take players’ money and data.
Why Streaks and Patterns Don’t Matter
After five rounds under 1.50x, many players feel that a high multiplier is due. It isn’t. Under the model, the chance of reaching 2.00x is still about 48.5%, exactly as in any other round. Believing otherwise is the gambler’s fallacy.
Streaks feel meaningful because they are more common than intuition suggests. Try the first panel of the calculator: at a 2.00x target, the chance of missing five rounds in a row is about 3.6%, roughly one run in 28. Over a long session of a few hundred rounds, runs like that are normal, and longer ones turn up too.
The history bar and the Top tab in the game show the past. They make the game social and transparent, but they don’t help you guess the next round.
Martingale in Numbers
Martingale doubles the stake after each loss at 2.00x, so that one win recovers every loss plus the first stake. It feels safe because most cycles end with a small win. The risk hides in the rare long streak.
| Losses in a row | Already lost | Next bet | Bankroll needed | Chance per cycle |
|---|---|---|---|---|
| 6 | $63 | $64 | $127 | 1.87% (1 in 54) |
| 7 | $127 | $128 | $255 | 0.96% (1 in 104) |
| 8 | $255 | $256 | $511 | 0.50% (1 in 202) |
| 9 | $511 | $512 | $1,023 | 0.26% (1 in 392) |
| 10 | $1,023 | $1,024 | $2,047 | 0.13% (1 in 762) |
Our calculation, assuming a 51.5% chance of losing at 2.00x (0.97/x model). A cycle wins $1 if it ends with a win.
Each cycle wins $1, while a $127 bankroll is wiped out by seven losses in a row. That streak is rare in one cycle, about 1 in 104, but over 100 cycles the chance of meeting it at least once is about 62%, and over 500 cycles about 99%. Casino limits can stop you sooner: if the maximum bet is $100, a common limit that each casino sets itself, the doubling from $1 can’t go past $64.
Most importantly, Martingale doesn’t change the house edge. Every bet in the chain still loses about 3% of its stake on average. The system swaps many small wins for one rare, large loss, and because it raises your stakes, it raises the average loss too. Enter your own numbers in the Martingale panel above, and read our Aviator tips and strategies for Fibonacci, fixed percent and other systems.
What the Model Can’t Tell You
- Official odds. Spribe states a 97% overall RTP. It doesn’t publish the chance of each multiplier or the share of rounds that end instantly at 1.00x, so the 0.97/x numbers are a model.
- Your casino’s settings. The game rules show the RTP as a value the casino’s setup fills in. We haven’t found a casino with a value other than 97%, but check the Game Rules screen where you play.
- The max win cap. Each casino caps the win on one bet in money. If that cap is $10,000, a $100 bet is cashed out automatically at 100x, whatever target you set.
- Your next session. Averages describe thousands of rounds. A single evening can land far from them in either direction.
If you notice that you play to win back losses, or that sessions run longer than planned, take a break. Our responsible gaming guide has tools and free help lines.
Aviator Odds FAQ
What are the odds of reaching 2x in Aviator?
It’s about 48.5% per round under a 97% RTP model, or roughly 1 in 2.1 rounds. Spribe doesn’t publish official odds for each multiplier, so treat this as an estimate.
Can the calculator predict the next round?
No. Each round comes from new Provably Fair seeds, and past rounds don’t affect it. The calculator shows chances and long-run averages, which is all the math can offer.
Does a low cash-out target reduce the house edge?
No. A low target wins more often but pays less. Under the model, every target returns about $0.97 per $1 on average, so the 3% edge stays the same.
Does Martingale work in Aviator?
No. It turns many small wins into one rare, large loss. With a $1 base at 2.00x, seven losses in a row cost $127, and over 100 cycles that streak shows up with a chance of about 62%. The average loss stays at 3% of every bet.
Is a high multiplier due after a run of low rounds?
No. Rounds are independent, so the chance of reaching any target is the same after a losing streak as after a winning one. Expecting a “due” result is the gambler’s fallacy.
Is the RTP the same at every casino?
It’s 97% as stated by Spribe, and we haven’t found a casino showing a different value. The game rules show the RTP set for your casino, so check the Game Rules screen before you play.
Play responsibly
Every Aviator round is random, and no app or pattern can predict when the plane flies away. Set a budget before you start, use your casino’s deposit and time limits, and never chase losses.