Statistics Calculators

Mean, Median, Mode, Standard Deviation, Permutation and Combination Calculators

Paste a list of numbers to get the mean, median, mode and range, or the standard deviation and variance. Combine two probabilities, see the chance of at least one success in many tries, and count permutations and combinations exactly.

Every Statistics tool

Average Calculator

Mean, median, mode and range of any list of numbers.

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Binomial Probability Calculator

Exactly, at most and at least k successes in n trials.

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Confidence Interval Calculator

Confidence interval for a mean, using t or z.

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Correlation Coefficient Calculator

Pearson r, Spearman rho and significance from paired data.

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Expected Value Calculator

Expected value, variance and SD of a set of outcomes.

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Five Number Summary Calculator

Min, quartiles, median, max, IQR and outliers.

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Linear Regression Calculator

Least-squares line of best fit, R² and predictions.

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Margin Of Error Calculator

Plus-or-minus for a poll or survey result.

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Normal Distribution Calculator

Areas under any bell curve, and values at a percentile.

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Percentile Calculator

Value at a percentile, or percentile rank of a value.

Permutation And Combination Calculator

nCr and nPr, with and without repetition, exact to the last digit.

Probability Calculator

Combine two probabilities, and the odds of at least once.

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Sample Size Calculator

How many responses a survey needs.

Standard Deviation Calculator

Sample and population standard deviation and variance of a list.

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Z-Score Calculator

Z-score, percentile and tail areas from a value, mean and SD.

Sample or population?

The standard deviation of a sample divides by n − 1 and the population version divides by n, so the two differ most for small data sets. The calculator gives both and labels which is which, so you can use whichever your course or analysis expects.

Averages, spread and chance

The average calculator gives the mean, median and mode together, so you can see when an outlier is pulling the mean away. The probability calculator combines independent events and answers the at least once question, and the permutation and combination calculator counts lottery tickets, passwords and rankings exactly.