Free Probability Calculator Online
Calculate basic probability, compound probability (AND/OR), conditional probability, binomial distribution, and normal distribution CDF with Z-score conversion. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.
How It Works
Select Probability Type
Choose from basic, compound, conditional, binomial, or normal distribution.
Enter Parameters
Input favorable outcomes, total outcomes, trials, or mean/SD depending on type.
View Probability
See probability as fraction, decimal, and percentage with distribution visualization.
Frequently Asked Questions
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