📊 Statistics & Probability Calculators
Regression, distributions and variance, computed in the browser.
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Linear Regression Calculator
Least-squares line, slope, intercept and R² from data.
Open calculator →Inverse Normal (InvNorm) Calculator
Find the z-score or value for a given probability.
Open calculator →Sample Variance Calculator
Sample and population variance and standard deviation from data.
Open calculator →Poisson Distribution Calculator
Probability of k events given an average rate λ.
Open calculator →Standard Deviation Calculator
Get sample and population standard deviation from a list of numbers.
Open calculator →Z-Score Calculator
Convert a value to a standard score using the mean and standard deviation.
Open calculator →Mean, Median, Mode Calculator
Find the mean, median, mode and range of any list of numbers.
Open calculator →Confidence Interval Calculator
Build a confidence interval for a mean from the sample mean, SD and size.
Open calculator →Permutation and Combination Calculator
Compute nPr and nCr — count arrangements and selections.
Open calculator →Explore Other Categories
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