Impostor Odds Calculator – Among Us

The beauty of our calculator is that it's so simple. All you need to do to get your probability figured out is:

• Input the number of games you want to play.
• Select or type the number of impostors you want in the games and how many people are playing.

Then, in the next section of the calculator:

• Pick which role you want to check the probability for. After all, some people prefer to play as crewmates!
• Is it the probability of playing as an impostor precisely three times? Or maybe you'd rather check how probable it is that you'll be a regular crewmate five or more times? Don't worry — we're prepared for all of the cases! Pick the option that suits your needs.
• Input the value of X from the previous field.

Aaaand, voilà! At the bottom of the calculator, you will see your probability result. We even made a bar chart 📊 for you to illustrate it!
If you're interested in the math behind this calculator, move on to the following section.

In each game of "Among Us," there is a fixed number of players, and some of them are randomly chosen to be impostors. For instance, if eight people are playing and the system decides on two bad guys, then 2 / 8 = 1/4 of astronauts become impostors. Therefore, before the game starts and gives away the roles, there is a chance of 1/4 = 25% that one particular player will be the villain.

When you finish the play and distrust blooms in the hearts of all the players, you begin a new game. The rules are the same: there is a 25% chance of becoming an impostor. However, intuitively, we can say that it's more probable that someone new will be the evil one. After all, there were two impostors and six crewmates in the game before, so we had three times more respectable space engineers.

The property described above is what brainy mathematicians call binomial probability. As mentioned in our probability calculator, it is a random process that we repeat several times, and each time there are two possible outcomes with the same probabilities in every instance.

For example, let's take three games and consider two impostors among eight players. What is the probability that one particular player will be the impostor twice?

The chance of playing as an impostor in a game is 2 / 8 = 25%, and that of being a crewmate is 6 / 8 = 75%. Next, we need to think in which of the three games our player was the impostor: it was either first and second, first and third, or second and third; let's call them options (1), (2), and (3), respectively.

For (1), there was a 25% chance to be the impostor in the first play, a 25% chance to be one in the second, and a 75% chance of not being one in the last. We multiply these values to get

25%·25%·75% = 4.6875%.

Similarly, for (2) and (3), we get

25%·75%·25% = 4.6875%

and

75%·25%·25% = 4.6875%.

We see that the number stays the same. All in all, if we add the results of the three options, we get

4.6875% + 4.6875% + 4.6875% = 14.0625%

which is the probability of a player being an impostor in two out of three games.

Lastly, just to give you a taste of some nice-looking mathematical formulas, let's describe the general case. If the probability of being an impostor is equal to p, then the chance of playing a good guy is 1-p. Therefore, the probability that a player will be the impostor k times in n games is equal to

P(n,k) = C(n,k) × pᵏ × (1-p)ⁿ⁻ᵏ

where C(n,k) is the number of combinations of k elements in an n-element set.

🙋 Do you want to calculate the probability of winning in other games? Before learning how to pay "Among Us" like a pro, visit the odds calculator.

We've covered how to use this calculator, and after the comprehensive explanation above, we're pretty sure the math behind it is crystal clear. But that's not all we have to offer! In this section, you will find some simple tips and tricks that will allow you to become the best crewmate-slash-detective and/or the best murderous-alien-in-disguise this spaceship has ever seen.

Want to become the best detective on the surface of Polus? Here's what to do.

• Be smart about doing your tasks. While finishing them up quickly is one way to win, it's tough to do that before the impostors manage to kill everyone off. Consider spending some time in security or admin areas first — you might end up gathering some crucial information that will allow you to single out impostors and win faster than you would through tasks.
• Don't go wasting your emergency meetings without a good reason. This is why:

Are you interested in game-related calculators? You may also enjoy the Pokémon Go Candy and the Pokémon Go weight loss calculator.