WebToolArcStatistics Tools
Free browser-based statistics tools with instant results and no account required.
Standard Deviation Calculator
Calculate mean, population standard deviation, and sample standard deviation.
Statistics ToolsMean Median Mode Calculator
Calculate mean, median, mode, range, and count from a list of numbers.
Statistics ToolsWeighted Average Calculator
Calculate a weighted average from values and weights.
Statistics ToolsMedian Calculator
Calculate the median of a list of numbers.
Statistics ToolsMode Calculator
Find the most frequent value or values in a list.
Statistics ToolsRange Calculator
Calculate the range of a list of numbers.
Statistics ToolsVariance Calculator
Calculate population and sample variance.
Statistics ToolsPermutation Calculator
Calculate permutations nPr.
Statistics ToolsCombination Calculator
Calculate combinations nCr.
Statistics ToolsStatistics Calculator
Calculate descriptive statistics from a list of numbers.
Statistics ToolsZ-Score Calculator
Calculate a z-score from a value, mean, and standard deviation.
Statistics ToolsConfidence Interval Calculator
Calculate a z-based confidence interval for a sample mean.
Statistics ToolsProbability Calculator
Calculate simple event probability, odds, and complements.
Statistics ToolsSample Size Calculator
Estimate survey sample size from confidence level and margin of error.
Statistics ToolsPermutation and Combination Calculator
Calculate permutations and combinations with or without repetition.
Statistics ToolsLinear Regression Calculator
Fit a least-squares regression line to paired x and y data.
Statistics ToolsCorrelation Coefficient Calculator
Calculate Pearson correlation from paired numeric data.
Statistics ToolsNormal Distribution Calculator
Calculate normal-distribution probabilities, percentiles, and raw scores.
Statistics ToolsP-Value Calculator
Calculate p-values from common statistical test statistics.
Statistics ToolsStandard Error Calculator
Calculate standard error for a mean, proportion, or raw sample.
Statistics ToolsBinomial Distribution Calculator
Calculate exact binomial probabilities for repeated independent trials.
Statistics ToolsPoisson Distribution Calculator
Calculate Poisson probabilities from an expected event rate.
Statistics ToolsInterquartile Range Calculator
Calculate quartiles, IQR, and common outlier fences from raw data.
Statistics ToolsPercentile Calculator
Calculate a percentile value or percentile rank from a dataset.
Statistics ToolsExpected Value Calculator
Calculate expected value and variance for a discrete probability distribution.
Statistics ToolsMargin of Error Calculator
Calculate a confidence-interval margin of error for a mean or proportion.
Statistics ToolsCoefficient of Variation Calculator
Calculate coefficient of variation from raw data or summary statistics.
Statistics ToolsCritical Value Calculator
Find critical values for normal, t, chi-square, and F distributions.
Statistics ToolsDegrees of Freedom Calculator
Calculate degrees of freedom for common statistical procedures.
Statistics ToolsBox Plot Maker
Create a browser-based box-and-whisker plot from numeric data.
Statistics ToolsFrequency Table Maker
Create a frequency table from pasted numeric or categorical values.
Statistics ToolsT-Test Calculator
Run a one-sample or independent two-sample Welch t-test.
Statistics ToolsChi-Square Calculator
Run chi-square goodness-of-fit or independence calculations.