Statistics & Data Analysis

Scatter Plot Maker

Easily create customizable scatter plots to visualize relationships between two variables. Perfect for data analysis and presentations.

Pie Chart Generator

Generate beautiful pie charts online for free. Download as image or embed in your website. Easy to use pie chart maker with customizable colors and labels.

Doughnut Chart Generator

Generate beautiful doughnut charts online for free. Download as image or embed in your website. Easy to use doughnut chart maker with customizable colors and labels.

Bar Chart Generator

Generate beautiful bar charts online for free. Download as image or embed in your website. Easy to use bar chart maker with customizable colors and labels.

Line Chart Generator

Generate beautiful line charts online for free. Download as image or embed in your website. Easy to use line chart maker with customizable colors and labels.

Bubble Chart Generator

Generate beautiful bubble charts online for free. Download as image or embed in your website. Easy to use bubble chart maker with customizable colors and sizes.

Average Calculator

Calculate average, median, mode, standard deviation, and other statistical measures from your data set. Free online average calculator with step-by-step calculations.

Standard Deviation Calculator

Free online standard deviation calculator that calculates population and sample standard deviation from your data set. Perfect for statistics, data analysis, and research with step-by-step solutions.

Weighted Average Calculator

Calculate weighted average online with our free calculator. Enter values and weights to get instant weighted mean results with step-by-step calculations.

Variance Calculator

Calculate variance for population and sample data sets with step-by-step solutions and detailed explanations.

Table Chart Generator

Free online table chart generator to create beautiful data tables with customizable styling, sorting, filtering, and export options. Perfect for data visualization, reports, and presentations. No registration required.

Visualize JSON Data Graph

Visualize JSON data as interactive graphs and charts. Free online JSON data visualization tool.

Visualize Time Intervals

Visualize the given time intervals on a chart.

Visualize Date Intervals

Visualize the given date intervals on a chart.

Mean Median Mode Range Calculator

Calculate mean, median, mode, and range of any data set. Free online statistics calculator with instant results and detailed analysis.

Probability Calculator

Calculate probabilities of independent events including union, intersection, complement, and exclusive or. Free online probability calculator with instant results.

Z Score Calculator

Calculate z-scores from raw scores, mean, and standard deviation. Convert between z-scores and probabilities with our free online z-score calculator.

Sample Size Calculator

Calculate the minimum sample size needed for your surveys and studies with our free online sample size calculator. Also find margin of error with confidence level options.

Statistics Calculator

Compute comprehensive statistics including mean, standard deviation (population and sample), geometric mean, sum, sum of squares, and more with our free online statistics calculator.

Confidence Interval Calculator

Calculate confidence intervals and margin of error for your data with customizable confidence levels. Free online statistics calculator.

Percentile Calculator

Calculate percentiles for any data set using the standard PERCENTILE.INC formula. Free online percentile calculator with step-by-step solutions and statistics.

Quartile Calculator

Calculate quartiles Q1, Q2, Q3, interquartile range (IQR), median, min, max, and range for any data set. Free online quartile calculator with step-by-step solutions.

Stem and Leaf Plot Generator

Generate stem and leaf plots (stemplots) from your data set with automatic statistical calculations. Free online stem plot generator for data visualization.

Vote Percentage Calculator

Calculate vote percentages for candidates or ballot options. Free online vote percentage calculator for elections, polls, and surveys.

Linear Regression Calculator

Calculate linear regression line y = mx + b with slope, intercept, and coefficient of determination (R²) using least squares method. Free online linear regression calculator.

ANOVA Calculator

Perform one-way ANOVA test to determine if there are significant differences among group means. Includes complete ANOVA table, effect size measures, and step-by-step hypothesis testing.

Average Deviation Calculator

Calculate the average deviation (mean absolute deviation) of a dataset with step-by-step math and statistics summary.

Box and Whisker Plot Maker

Generate professional box and whisker plots with interactive visualization, comprehensive statistics, quartile analysis, and outlier detection.

Central Limit Theorem Calculator

Calculate probabilities using the Central Limit Theorem with step-by-step solutions, Z-scores, and standard error calculations for sample means.

Chi-Square Test Calculator

Perform a chi-square test of independence to determine association between two categorical variables. Get chi-square statistic, p-value, expected frequencies, and Cramer V effect size.

Coefficient of Variation Calculator

Calculate Coefficient of Variation (CV) with step-by-step formulas, data analysis, and comprehensive statistics for your datasets. Supports sample and population calculations.

Cohen's d Calculator

Calculate Cohen's d effect size to measure the standardized difference between two group means. Features step-by-step calculations, effect size interpretation, and support for raw data and summary statistics.

Confidence Interval for Proportion Calculator

Calculate the confidence interval for a population proportion based on sample size, number of successes, and confidence level.

Correlation Coefficient Calculator

Calculate Pearson and Spearman correlation coefficients between two datasets with scatter plot visualization.

Effect Size Calculator

Calculate effect sizes including Cohens d, Hedges g, Glass delta, eta-squared, omega-squared, and Cohens f from two groups, t-tests, ANOVA, or correlation.

Gaussian Distribution Generator

Generate random numbers following a Normal (Gaussian) Distribution with configurable mean, standard deviation, and sample size. Features interactive bell curve visualization, and statistical analysis.

Geometric Mean Calculator

Calculate the geometric mean of any dataset with step-by-step formulas, comparison with arithmetic and harmonic means, and interactive visualization.

Harmonic Mean Calculator

Calculate the harmonic mean of any dataset with step-by-step formulas, comparison with arithmetic and geometric means, and interactive visualization for rates, speeds, and financial analysis.

Histogram Maker

Create beautiful histograms online with comprehensive statistical analysis including mean, median, mode, skewness, kurtosis, and distribution shape detection.

Kruskal-Wallis Test Calculator

Perform a Kruskal-Wallis H test online to compare three or more independent groups. Get instant p-values, test statistics (H), tie correction, and detailed ranking steps.

Mann Whitney U Test Calculator

Perform a Mann-Whitney U test on two independent groups and get critical values, z-scores, p-values, and a step-by-step ranks table.

Mean Calculator

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

Median Absolute Deviation Calculator

Calculate the Median Absolute Deviation (MAD) of any dataset with step-by-step formulas, scale factor options, outlier detection, and comparison to standard deviation.

Median Calculator

Calculate the median of any dataset with step-by-step explanations, quartiles, sorted data view, and a box plot visualization.

Mean Median Mode Calculator

Calculate mean, median, mode, and range with step-by-step formulas and interactive visualizations for any dataset.

Midrange Calculator

Calculate the midrange (arithmetic mean of maximum and minimum values) of any dataset. Get step-by-step formula breakdowns, min/max details, and sorted data analysis.

Negative Binomial Distribution Calculator

Calculate negative binomial distribution probabilities for modeling trials or failures needed to achieve r successes. Get PMF, CDF, step-by-step solutions, charts, and trial sequence visualizations.

Normal Distribution Calculator

Calculate probability density function (PDF), cumulative distribution function (CDF), and inverse normal distribution values with a beautiful interactive bell curve graph.