Probability Calculator
Find the probability and odds of an event.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
This calculator applies the classical probability formula, P(event) = favorable outcomes / total outcomes, and also converts the result into odds format (e.g., 1 in 4, or 3-to-1 against), since both notations are used in different contexts.
Statistics students use it for coursework on dice, cards, and coin-flip problems; anyone evaluating a game of chance or a raffle uses it to see their real chances; and it underlies basic risk assessment questions like the probability of drawing a specific card from a deck or winning a lottery. The calculator keeps the result expressed as a clean fraction, decimal, and percentage side by side, since different fields (gambling odds vs. statistics vs. everyday conversation) tend to prefer different formats.
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