Probability Distribution Calculator and Statistical Tables

Normal, t, Chi-Squared and F Distributions

Use this free probability calculator to work with normal, Student's t, chi-squared and F distributions. Compute probabilities, critical values and distribution-based statistics online.

When you are ready to use probability concepts for statistical analysis, explore our statistical inference tools for confidence intervals and hypothesis testing.

What is a probability distribution calculator?

A probability distribution calculator helps compute probabilities, quantiles and critical values for common statistical distributions. This tool supports the standard normal, Student's t, chi-squared and F distributions, making it useful for statistical inference, hypothesis testing and probability calculations.

Which probability distributions are available?

The calculator includes the standard normal, Student's t, chi-squared and F distributions. You can calculate probabilities and critical values using one-tailed or two-tailed calculations, depending on the selected distribution and analysis.

Standard Normal t-Student Chi-Squared F Fisher-Snedecor

Check the box to enter a probability value, instead of an x value.

Check the box to use two tails instead of one tail.

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