Statistics Calculators
Related calculations are grouped together so you do not have to open several nearly identical tools.
Popular calculators
12 toolsStatistics CalculatorEnter one data set and calculate mean, median, mode, min, max, range, quartiles, variance, standard deviation, standard error and coefficient of variation together.Probability CalculatorCalculate AND, OR, conditional probability, odds conversions and expected value in one place.Regression CalculatorEnter paired X and Y data and calculate slope, intercept, R-squared, correlation, covariance and a prediction together.Z Test CalculatorRun a one-sample z test when the population standard deviation is known, with p-value, decision, effect direction and student-friendly interpretation.One-Sample t-Test CalculatorTest whether a sample mean differs from a hypothesized population mean when the population standard deviation is unknown.Two-Sample t-Test CalculatorCompare the means of two independent groups using Welch's two-sample t test.Paired t-Test CalculatorCompare paired measurements such as before-and-after values by testing the mean of the within-pair differences.Chi-Square Test CalculatorRun a chi-square test of independence from a contingency table and interpret the association between categorical variables.One-Way ANOVA CalculatorCompare three or more group means using one-way ANOVA with F statistic, p-value and student-friendly interpretation.Multiple Linear Regression CalculatorFit an ordinary least squares model with multiple predictors and calculate coefficients, R², adjusted R², SSE, SSR, SST, MSE and RMSE.Regression Diagnostics CalculatorInspect residuals, leverage and Cook's distance for an ordinary least squares regression model.Residual Analysis CalculatorAnalyze fitted values and residuals with residual metrics and a residual-vs-fitted visualization.
More calculators
30 toolsPopulation VarianceUse the Population Variance to get a fast estimate with a clear formula and result.Sample VarianceUse the Sample Variance to get a fast estimate with a clear formula and result.Population Standard DeviationUse the Population Standard Deviation to get a fast estimate with a clear formula and result.Sample Standard DeviationUse the Sample Standard Deviation to get a fast estimate with a clear formula and result.Z-ScoreUse the Z-Score to get a fast estimate with a clear formula and result.Coefficient of VariationUse the Coefficient of Variation to get a fast estimate with a clear formula and result.Margin of ErrorUse the Margin of Error to get a fast estimate with a clear formula and result.Confidence Interval Half-WidthUse the Confidence Interval Half-Width to get a fast estimate with a clear formula and result.Sample Size for MeanUse the Sample Size for Mean to get a fast estimate with a clear formula and result.Sample Size for ProportionUse the Sample Size for Proportion to get a fast estimate with a clear formula and result.Pearson CorrelationUse the Pearson Correlation to get a fast estimate with a clear formula and result.Population CovarianceUse the Population Covariance to get a fast estimate with a clear formula and result.Sample CovarianceUse the Sample Covariance to get a fast estimate with a clear formula and result.Regression SlopeUse the Regression Slope to get a fast estimate with a clear formula and result.Regression InterceptUse the Regression Intercept to get a fast estimate with a clear formula and result.Independent AND ProbabilityUse the Independent AND Probability to get a fast estimate with a clear formula and result.Independent OR ProbabilityUse the Independent OR Probability to get a fast estimate with a clear formula and result.Odds to ProbabilityUse the Odds to Probability to get a fast estimate with a clear formula and result.Probability to OddsUse the Probability to Odds to get a fast estimate with a clear formula and result.Binomial MeanUse the Binomial Mean to get a fast estimate with a clear formula and result.Binomial VarianceUse the Binomial Variance to get a fast estimate with a clear formula and result.Binomial Standard DeviationUse the Binomial Standard Deviation to get a fast estimate with a clear formula and result.Normal Distribution ZUse the Normal Distribution Z to get a fast estimate with a clear formula and result.Relative RiskUse the Relative Risk to get a fast estimate with a clear formula and result.Odds RatioUse the Odds Ratio to get a fast estimate with a clear formula and result.Probability CalculatorUse the Probability Calculator for a fast estimate with clear inputs, formula guidance and related tools.Normal Distribution CalculatorUse the Normal Distribution Calculator for a fast estimate with clear inputs, formula guidance and related tools.Binomial Probability CalculatorUse the Binomial Probability Calculator for a fast estimate with clear inputs, formula guidance and related tools.Confidence Interval CalculatorUse the Confidence Interval Calculator for a fast estimate with clear inputs, formula guidance and related tools.Descriptive Statistics CalculatorEnter one dataset and calculate count, sum, mean, median, mode, min, max, range, quartiles, IQR, variance and standard deviation together.