Probability Calculator
Calculate probabilities, combinations (nCr), permutations (nPr), factorials, coin flip and dice odds, and Bayes' theorem. 100% client-side.
10.5Kuses
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Enter favorable outcomes and total outcomes.
How to Use the Probability Calculator
- Select a calculation mode: Basic, Combinatorics, Coin/Dice, or Bayes.
- Enter the required values for your calculation.
- Results appear instantly with formulas and explanations.
Calculators Included
- Basic probability: favorable events / total outcomes
- Combinations (nCr): choosing r items from n without order
- Permutations (nPr): arranging r items from n with order
- Factorials: n!
- Coin flip probability for exact number of heads
- Dice roll probability for target values
- Bayes' theorem: posterior probability calculation
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Disclaimer: This tool is provided as-is for informational and educational purposes only.