Luck Calculator
How lucky are you? Spin the wheel and keep spinning, every spin you survive tips the odds further against you. How far you get is your luck score.
Spin the wheel
90% green
Spin 1 · 10% of the wheel is now red
Every possible ending, and what it is worth
Every outcome the wheel can produce, with the odds behind it. Your score is the share of players who finish on a shorter run.
| Ending | Chance | Score |
|---|---|---|
| 0 spins, No luck at all | 10% | 0 |
| 1 spin, Unlucky | 18% | 10 |
| 2 spins, Slightly unlucky | 21.6% | 28 |
| 3 spins, Average | 20.2% | 49.6 |
| 4 spins, Lucky | 15.1% | 69.8 |
| 5 spins, Very lucky | 9.1% | 84.9 |
| 6 spins, Remarkably lucky | 4.2% | 94 |
| 7 spins, Extraordinary | 1.5% | 98.2 |
| 8 spins, Absurd | 1 in 306 | 99.6 |
| 9 spins, Legendary | 1 in 2,756 | 100 |
This is a press-your-luck game with real probabilities behind it. The wheel starts 90% green, and every spin you survive shifts ten points from green to red, so the run always ends eventually.
It returns your streak, a luck score out of 100 showing the share of players who would do worse, and the exact odds of the run you had.
How the luck wheel works
This is a press-your-luck game with real arithmetic behind it. The wheel starts 90% green. Spin it: land on green and you survive, land on red and the run is over.
Every spin you survive moves ten points from the green side to the red. So the second spin is 80% green, the third 70%, and by the tenth there is no green left at all. The run always ends. The only question is how far you got.
Because the odds are known exactly at every step, your score is not a guess. It is the percentage of players who would finish on a shorter run than yours. Surviving three spins scores about 49.6, which means you did better than roughly half the field.
What to enter
- Spin
- Turns the wheel once. There is nothing to type in: the only decision is whether to spin again or stop.
- Your luck score
- Out of 100. The share of players who would end on a shorter streak than you did. Higher is better.
- Spins survived
- Your streak, and the thing actually being measured. Zero means red on the first spin, from a wheel that was 90% green.
- Odds of your run
- How rare your exact result is, written as a 1-in-N figure so it means something.
What each streak is worth
- 0 spins
- Red immediately, on a 90% green wheel. Happens to 1 player in 10.
- 1–2 spins
- Below average. Together these account for about 40% of all runs.
- 3 spins
- The typical result. The average run is 2.66 spins.
- 5 spins
- Score 84.9. You beat about five players in six.
- 7 spins
- Score 98.2. Fewer than one player in fifty gets this far.
- 9 spins
- Every spin survived, including one on a wheel that was 90% red. A genuine 1-in-2,756 run.
What this assumes
The wheel is genuinely random. Each spin uses your browser's cryptographic random generator, and the result is decided by where the pointer actually lands rather than picked first and animated afterwards.
Past spins have no effect on future ones. A long green streak does not make red more likely next time, and the shrinking green slice is the only thing that changes the odds.
How to calculate your luck score
Chaining several chances together is the whole idea. To survive a run you have to win every spin, so the probabilities multiply rather than add.
- 0.9
- The green share on spin 1
- 0.8
- The green share on spin 2, and so on down
- n
- How many spins in a row you are asking about
Write each spin as a decimal. 90% green becomes 0.9, then 0.8, then 0.7, dropping by 0.1 each time.
Multiply, do not add. Surviving spin 1 AND spin 2 means multiplying: 0.9 x 0.8 = 0.72, so 72%. That AND rule is the same one the probability calculator applies.
Turn it into a score. Your score is 100 minus your survival chance as a percentage. Reaching 3 spins has a 50.4% chance, so it scores 49.6.
See a worked example: the odds of surviving five spins
- Spins
- 5
- Green shares
- 90%, 80%, 70%, 60%, 50%
0.9 x 0.8 = 0.72
0.72 x 0.7 = 0.504
0.504 x 0.6 = 0.3024
0.3024 x 0.5 = 0.1512, which is 15.12%.
So about 1 run in 7 reaches five spins. Your score would be 100 - 15.12 = 84.88.
15.12% chance, scoring 84.9 out of 100
Frequently asked questions
It is measuring one run of a random game, which is the only honest thing any luck test can do. There is no evidence that luck is a stable personal trait, so nothing here can predict tomorrow.
What it does give you is a real number: your streak compared against the exact probability of that streak. That is a genuine percentile, not a personality quiz result.
No, and that is deliberate. The best possible run is nine spins, which scores 99.96 rather than 100, because a small fraction of players do match it.
Ten spins is impossible: by then the wheel is entirely red.
Because the odds fall off a cliff. Going from 3 spins to 5 moves you from 49.6 to 84.9, since only about 15% of runs get that far.
At the top end the opposite happens: 8 spins scores 99.64 and 9 scores 99.96. The gap looks tiny but is nearly a tenfold difference in rarity.
There is no strategy, which is what makes it a luck test rather than a game of skill. Stopping does not lock in a score, and the run only ends on red.
If you are curious about the maths of quitting while ahead, that idea does apply to games where you can bank winnings. Here there is nothing to bank.
2.66 spins. That is the sum of the survival chances at every step, and it is why 3 spins reads as roughly average rather than good.
One player in ten loses on the very first spin despite the wheel being 90% green. Being unlucky once is not unusual.
Problems people actually run into
Assuming a 90% chance means you are safe
A 90% green wheel loses one time in ten. That feels wrong to most people, who read 90% as near-certain, and it is the single most common reaction to this game.
The same misreading shows up well outside games: a 10% failure rate on anything you do repeatedly is close to a guarantee it will happen eventually. Chain ten 90% chances together and you are down to about a 35% chance of getting through all of them.
Results are estimates for general information only and are not professional financial, medical, or legal advice. Read our full disclaimer.
Last updated: August 29, 2026