Statistics online

Statistical tests, charts, probabilities and clear results. Automatically checks assumptions, interprets results and outputs graphs, histograms and other charts.
The statistics online calculators support not only the test statistic and the p-value but more results like effect size, test power, and the normality level.
If one of the validations fails, the tool recommends a solution.
What statistical test should you use? the following link will help you choose: choose a statistical test - decision questionnaire (Tutorial).

Test statistic calculators

Find the test statistic calculator

TestAssumptionsRequired sample data
#Test nameCheckStatisticNormal DistributionIndσσ12dμ/px̄/p̂;nSdata
1One Sample Z-TestMeanZ statistic
2One Sample T-TestMeanT statistic
3Two Sample Z-TestMeanZ statistic
4Two Sample T-Test (Pooled variance)MeanT statistic
5Two Sample T-Test (Welch's)MeanT statistic
6Two Sample Mann-Whitney U TestRankU statistic
7Paired T-TestMeanT statisticPaired
8Paired Wilcoxon Sign Rank TestRankT statisticPaired
9One Way ANOVA TestMeanF statistic
10Repeated Measures ANOVA TestMeanF statisticDependent
11Friedman TestMeanχ²(df) = 12j=1kRj2-3n2k(k+1)2nk(k+1)-CtiesDependent
11Kruskal-Wallis TestMeanF statistic
12Two Way ANOVA Test
Fixed model, Mixed model, Random mode, Mixed model with repeats
MeanF statistic
13One Way MANOVA Test
14One Sample Proportion TestProportionZ statisticBinomial
15Two Sample Proportion TestProportionZ statisticBinomial
16Chi-Squared Test For Varianceσchi-squared statistic
17F Test For VariancesσF statistic
18Levene's Test For VariancesσF statistic
19Chi-Squared Test For Goodness Of Fit
(McNemar test, Chi-squared test for association, Fisher test, Binomial test)
Fitchi squared statistic
20Shapiro-Wilk TestFitw statistic
21Kolmogorov Smirnov TestFitD = Max1≤i≤n(Di+,Di-)
22Two-Sample Kolmogorov Smirnov TestFitD = Max1≤i≤n(Di+,Di-)
23Kaplan Meier Survival AnalysisSurvivalw statistic
** - yes, - no, empty - irrelevant

Regression calculator

1Simple Linear RegressionRegression F statistic
2Multiple Linear RegressionRegression F statistic
3*Bulk Linear RegressionRegression F statistic
4Binary Logistic Regressionχ2 = 2(LL1-LL0)
5Multinomial Logistic Regressionχ2 = 2(LL1-LL0)
*Bulk linear regression calculator for several dependent variables with the same predictors.

Confidence interval, Sample size, Effect Size

1Sample size calculatorssample size chart
2Test power calculatorsstatistics power chart
3Effect size calculators
4Confidence intervals calculatorsstatistics power chart

Distribution calculators

2DistributionsDistribution Calculator
3Normal DistributionNormal Distribution
4Binomial DistributionBinomial Distribution
5T Distribution (Student's)T Distribution
6Chi-Squared DistributionChi squared Distribution
7F Distribution (Fisher-Snedecor)F Distribution
8Poisson DistributionDistribution
9Weibull Distribution
10Exponential Distribution

Statistical tables

1Z table
2T table

Statistics calculators

Each statistics calculator contains step by step calculation.

#Statistic calculatorImage
1Descriptive statistics
3Mean Median Mode (Q1, Q3, IRQ, Range)mean
4Measures Of Dispersion (Mean, sample size, APA style)
5Standard Deviation (Mean, sample size, APA style)S=i=1n(xi-)2n-1
6variance (Variance, Mean, SEM, MAD)S2=i=1n(xi-)2n-1
7Coefficient of VariationCV
8Average (Sum, Count)
9Sample Mean (Sum, Count)
10Geometric Mean (Product, n-th root)GM
11Harmonic MeanH
12Probability (Probability formula, Dependent events, Bayes' Theorem, Independent events)P(A), P(A|B), P(A∩B), P(A∪B)
13Combinations calculator (With/Without Repetitions)
Permutation calculator (With/Without, Repetitions)
14Combinations generator (Combinations generator, Permutation generator, Repetitions)
15Correlation calculator (Pearson correlation, Spearman's rank correlation)
16Outliers (Tukey's Fences (Boxplot), Z-Score)
17Markov chain calculator (nth step probability vector, steady-state vector)
18Odds calculator (odds to probability, probability to odds)
19Betting odds calculator (fractional odds, decimal odds, American odds)
20Mean absolute deviation calculator (MAD calculator)
21Median absolute deviation calculator (MAD calculator)


1Principal component analysisboxplot
2Cluster analysisboxplot
3Histogram makerhistogram
4Box plot makerboxplot
5Bar graph makerbar graph
6Pie chart makerpie chart
7Line chart makerline chart
8Scatter chart makeracatter chart
9Area chart makerarea chart
10Violin plot makerarea chart
11Venn diagram makerarea chart
12Venn diagram calculatorVenn diagram calculator1239
13Stem and Leaf Plot makerarea chart



Free statistics exams with solution.

Statistical Tests


The goal of this website is to make statistics accessible to anyone, converting complex statistical jargon into common everyday language.
We help everybody to calculate statistics.
The calculators also provide R codes for your convenience.
We started adding a step-by-step work-through for education purposes, an easy guide on how to calculate test statistics.


We put in a lot of effort to provide accurate results and we automatically test every new page, The older pages were tested manually, but we slowly also automate the old pages.
We usually compare the results to the R results.
The information and tools on this website are given AS IS WITHOUT ANY WARRANTY OF ANY KIND.

Calculate statistics

The best online calculator to calculate statistics.