Statistics & Probability Calculators

67 free statistics calculators for standard deviation, distributions, hypothesis testing, regression, and probability. No signup required.

68 free tools

Box Plot Generator

Free online Box Plot Generator.

Bayes' Theorem Calculator

Free online Bayes' Theorem Calculator.

A/B Test Calculator

Free online A/B Test Calculator.

Coefficient of Variation Calculator

Calculate the coefficient of variation (CV) as a percentage. Measure relative variability by comparing standard deviation to the mean.

Beta Distribution Calculator

Free online Beta Distribution Calculator.

ANOVA Calculator

Free online ANOVA Calculator.

Correlation Coefficient Calculator

Free online Correlation Coefficient Calculator.

Combination Calculator

Free online Combination Calculator.

Binomial Distribution Calculator

Free online Binomial Distribution Calculator.

Covariance Calculator

Free online Covariance Calculator.

Birthday Paradox Calculator

Free online Birthday Paradox Calculator.

5-Number Summary Calculator

Free online 5-Number Summary Calculator.

Geometric Mean Calculator

Free online Geometric Mean Calculator.

Chi-Square Calculator

Free online Chi-Square Calculator.

Harmonic Mean Calculator

Free online Harmonic Mean Calculator.

Mean Absolute Deviation Calculator

Free online Mean Absolute Deviation Calculator.

Coin Flip Probability Calculator

Free online Coin Flip Probability Calculator.

Mean, Median, Mode Calculator

Calculate mean, median, mode, and range for any dataset. Enter your numbers for instant central tendency analysis.

Outlier Calculator

Free online Outlier Calculator.

Conditional Probability Calculator

Free online Conditional Probability Calculator.

Percentile Calculator

Calculate any percentile (1st to 99th) for your dataset using linear interpolation. Enter data and the percentile rank for instant results.

Quartile & IQR Calculator

Calculate Q1, Q2, Q3, and interquartile range for any dataset. Instant quartile analysis with breakdown.

Root Mean Square Calculator

Free online Root Mean Square Calculator.

Permutation Calculator

Free online Permutation Calculator.

Dice Probability Calculator

Free online Dice Probability Calculator.

Confidence Interval Calculator

Free online Confidence Interval Calculator.

Skewness Calculator

Free online Skewness Calculator.

Probability Calculator

Free online Probability Calculator.

Expected Value Calculator

Free online Expected Value Calculator.

Spearman's Rank Correlation Calculator

Free online Spearman's Rank Correlation Calculator.

Exponential Distribution Calculator

Free online Exponential Distribution Calculator.

Standard Deviation Calculator

Calculate population and sample standard deviation for any dataset. Enter your numbers and get instant results with mean and variance breakdown.

Critical Value Calculator

Free online Critical Value Calculator.

Variance Calculator

Calculate population and sample variance for any dataset. Enter your numbers for instant variance analysis with mean and count.

Geometric Distribution Calculator

Free online Geometric Distribution Calculator.

Degrees of Freedom Calculator

Free online Degrees of Freedom Calculator.

Weighted Average Calculator

Calculate the weighted average (weighted mean) of data values and weights. Enter values and weights for instant results.

Z-Score Calculator

Calculate z-scores or reverse z-scores. Convert between raw values and standard scores using mean and standard deviation.

Error Propagation Calculator

Free online Error Propagation Calculator.

Hypergeometric Distribution Calculator

Free online Hypergeometric Distribution Calculator.

Lognormal Distribution Calculator

Free online Lognormal Distribution Calculator.

F-Statistic Calculator

Free online F-Statistic Calculator.

Lottery Probability Calculator

Free online Lottery Probability Calculator.

Fisher's Exact Test Calculator

Free online Fisher's Exact Test Calculator.

Exponential Regression Calculator

Free online Exponential Regression Calculator.

Negative Binomial Distribution Calculator

Free online Negative Binomial Distribution Calculator.

Normal Distribution Calculator

Free online Normal Distribution Calculator.

Hypothesis Testing Calculator

Free online Hypothesis Testing Calculator.

Poisson Distribution Calculator

Free online Poisson Distribution Calculator.

Mann-Whitney U Test Calculator

Free online Mann-Whitney U Test Calculator.

Least Squares Regression Calculator

Free online Least Squares Regression Calculator.

Margin of Error Calculator

Free online Margin of Error Calculator.

Linear Regression Calculator

Free online Linear Regression Calculator.

Uniform Distribution Calculator

Free online Uniform Distribution Calculator.

p-Value Calculator

Free online p-Value Calculator.

Weibull Distribution Calculator

Free online Weibull Distribution Calculator.

Mean Squared Error Calculator

Free online Mean Squared Error Calculator.

Power Analysis Calculator

Free online Power Analysis Calculator.

Percent Error Calculator

Free online Percent Error Calculator.

Sample Size Calculator

Free online Sample Size Calculator.

Polynomial Regression Calculator

Free online Polynomial Regression Calculator.

t-Test Calculator

Free online t-Test Calculator.

Quadratic Regression Calculator

Free online Quadratic Regression Calculator.

R-Squared Calculator

Free online R-Squared Calculator.

Relative Error Calculator

Free online Relative Error Calculator.

Z-Test Calculator

Free online Z-Test Calculator.

Standard Error Calculator

Free online Standard Error Calculator.

Statistics Calculator

Free online Statistics Calculator.