Statistical test calculators

The statistical test calculators provide more than just the simple results, the calculators check the tests' assumptions, calculate test powers and interpret the results. The 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.

Test calculators

TestAssumptionsRequired sample data
#Test nameCheckStatisticNormal DistributionIndσσ12dμ/px/p̂nSdata
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
10One Sample Proportion TestProportionZ statisticBinomial
11Two Sample Proportion TestProportionZ statisticBinomial
12Chi-Squared Test For Varianceσchi-squared statistic
13F Test For VariancesσF statistic
14Levene's Test For VariancesσF statistic
15Chi-Squared Test For Goodness Of Fit
(McNemar test, Chi-squared test for association, Fisher test, Binomial test)
Fitchi squared statistic
16Shapiro-Wilk TestFitw statistic
17Kaplan Meier Survival AnalysisSurvivalw statistic
** - yes, - no, empty - irrelevant

Regression calculators

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.

Statistical Power and Sample Size calculators

Distribution calculators

Statistical tables

Measurements calculators


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


We put in a lot of effort to provide accurate results and we automatically test every new page.
We usually compare the results to the R results.
The information and tools in this website are given AS IS WITHOUT ANY WARRANTY OF ANY KIND.