What Are The Odds Calculator
Calculate the probability of random events, from winning a bet to getting struck by lightning.
How this calculator works
Pick a wild scenario — winning Oz Lotto, getting struck by lightning, finding a four-leaf clover — or enter your own odds. We'll tell you the real probability and how many attempts you'd need before luck is on your side. Great for settling pub debates.
Enter the denominator — e.g. 100 for a 1-in-100 chance
How many times will you try?
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Frequently Asked Questions
How does this calculator work?
For a single attempt, the probability is simply 1/X. For multiple attempts, it calculates 1 minus the probability of failing every time: 1 - ((X-1)/X)^n, where n is the number of attempts.
What are the odds of winning Oz Lotto?
About 1 in 45 million for the jackpot (Division 1). You are roughly 10 times more likely to be struck by lightning in your lifetime than to win the jackpot from a single ticket.
Does trying more times guarantee success?
No. More attempts improve your cumulative probability, but each individual attempt has the same odds. Even with 1000 lottery tickets, your overall chance is still tiny.
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