ANOVA Calculator - Perform one-way ANOVA test to determine if there are significant differences among group means. Includes complete ANOVA table, effect size (eta-squared, omega-squared), interactive visualizations, and step-by-step hypothesis testing.

Arithmetic Mean Calculator - Calculate the arithmetic mean (average) of a set of numbers with comprehensive statistical analysis including median, mode, range, standard deviation, variance, and interactive data visualization. Featured

Average Calculator - Calculate mean, median, mode, geometric mean, harmonic mean, and weighted average with complete statistical analysis, visualizations, and step-by-step solutions. Featured

Average Deviation Calculator - Calculate the average absolute deviation (AAD) of a dataset from the mean or median. Includes step-by-step calculations, visual distribution chart, and comprehensive statistical analysis. Featured

Box and Whisker Plot Maker - Generate professional box and whisker plots with interactive visualization, comprehensive statistics, quartile analysis, outlier detection, and step-by-step calculations.

Chi-Square Test Calculator - Perform a chi-square test of independence to determine if there is a significant association between two categorical variables. Get chi-square statistic, p-value, expected frequencies, cell contributions, and Cramer's V effect size with step-by-step calculations.

Coefficient of Variation Calculator (High Precision) - Easily calculate the CV, a key statistical measure of data dispersion, with a detailed breakdown of its formula components.

Cohen's d Calculator - Calculate Cohen's d to measure the effect size between two means.

Compound Growth Calculator - Calculate compound annual growth rate (CAGR), future value, initial value, or time periods with interactive growth charts, detailed breakdowns, and comprehensive analysis for investments and business growth. Featured

Confidence Interval Calculator - Calculate confidence intervals for means and proportions with interactive visualization, t-distribution and z-distribution support, step-by-step calculations, and sample size recommendations.

Confidence Interval for Proportion Calculator - Compute confidence intervals for a population proportion with detailed step-by-step solutions! New

Correlation Coefficient Calculator - Calculate Pearson, Spearman, and Kendall correlation coefficients with interactive scatter plot, regression analysis, p-values, and step-by-step calculation breakdown.

Geometric Mean Calculator - Calculate the geometric mean of any dataset with step-by-step formulas, interactive visualization, comparison with arithmetic mean, and comprehensive statistical analysis.

Harmonic Mean Calculator - Calculate the harmonic mean of a set of numbers.

Histogram Maker - Generate histograms to visualize the distribution of your data.

Interquartile Range Calculator - Calculate the interquartile range of a set of numbers.

Kruskal-Wallis Test Calculator - Perform a Kruskal-Wallis H test to determine if there is a significant difference among independent samples.

Linear Regression Calculator - Calculate linear regression equation, slope, intercept, R-squared, and make predictions with interactive scatter plot visualization and step-by-step formula breakdown.

Logarithmic Growth Calculator - Calculate the logarithmic growth over time based on an initial value and growth rate.

Mann-Whitney U Test Calculator - Perform the Mann-Whitney U test (Wilcoxon rank-sum test) to compare two independent samples. Get U statistic, p-value, effect size, step-by-step calculations, and interactive visualizations.

Mean Absolute Deviation (MAD) Calculator - Calculate Mean Absolute Deviation with step-by-step formulas, interactive visualization, and comprehensive statistical analysis. Understand data variability with our free MAD calculator.

Mean Calculator - Calculate the arithmetic mean (average) of any dataset with interactive visualization, step-by-step formula breakdown, and comprehensive statistics including sum, median, range, and standard deviation.

Mean Median Mode Calculator - Calculate mean, median, mode and range with step-by-step formulas, interactive visualization, frequency analysis, and comprehensive statistical breakdown for any dataset.

Median Absolute Deviation Calculator - Calculate the median absolute deviation (MAD) of a dataset with step-by-step formulas, interactive visualization, outlier detection, and robustness comparison to standard deviation.

Median Calculator - Calculate the median value of a set of numbers with step-by-step explanations, interactive visualizations, and comprehensive statistical insights. Featured

Midrange Calculator - Calculate the midrange of any dataset with step-by-step visualization showing the midpoint between maximum and minimum values, plus comprehensive statistics including mean, median, and range comparison.

Mode Calculator - Calculate the mode of a set of numbers.

Outlier Calculator - Identify statistical outliers in your dataset using the IQR (Interquartile Range) method. Calculate Q1, Q3, and detect values that fall outside the normal range with step-by-step calculations. Featured

Population Standard Deviation Calculator - Calculate population standard deviation (σ) with step-by-step calculations, interactive visualization, variance, mean, and data quality assessment for complete population datasets.

Quartile Calculator - Calculate quartiles (Q1, Q2, Q3), interquartile range (IQR), detect outliers, and visualize data distribution with interactive box plots and step-by-step calculations.

Quartile Deviation Calculator - Calculate the quartile deviation (semi-interquartile range) of a dataset with interactive box plot visualization, complete quartile analysis (Q1, Q2, Q3, IQR), outlier detection, and step-by-step calculation breakdown.

Range Calculator - Calculate and visually graph the range of any data set effortlessly

Relative Standard Deviation Calculator - Calculate relative standard deviation (RSD) and coefficient of variation (%CV) with step-by-step formulas, interactive data visualization, statistical analysis, and data quality assessment. Featured

Root Mean Square Calculator - Calculate root mean square (RMS) of a set of numbers with step-by-step calculations, interactive visualization, AC/DC signal analysis, and statistical insights. Featured

Sample Mean Calculator - Calculate the sample mean (arithmetic average) of any dataset with step-by-step visualization, deviation analysis, data distribution chart, and comprehensive statistical insights.

Sample Size Calculator - Calculate needed sample size.

Sample Standard Deviation Calculator - Calculate sample standard deviation with step-by-step formulas, interactive data visualization, outlier detection, empirical rule analysis, and comprehensive statistics including variance, mean, median, and range.

Scatter Plot Maker - Create beautiful interactive scatter plots to visualize relationships between two variables. Features correlation analysis, trend lines, multiple styling options, and downloadable PNG charts.

Standard Deviation Calculator - Calculate standard deviation, variance, mean, and other statistics with step-by-step solutions and visualizations.

Standard Error Calculator - Calculate standard error of the mean (SEM) with step-by-step calculations, confidence intervals, data visualizations, and comprehensive statistical analysis for your dataset. Featured

Statistics Calculator - An all-in-one statistics calculator for count, sum, mean, median, mode, range, variance, standard deviation, geometric mean, harmonic mean, quartiles, outlier detection, and more.

t-Test Calculator - Perform Welch's t-test to determine if there is a statistically significant difference between the means of two independent groups.

Variance Calculator (High Precision) - Compute both sample and population variance. Step-by-step instructions and formulas included.

Z-Score Calculator - Compute z-scores quickly and easily with a clear, step-by-step method! New