Free Statistics Calculators

Stat Study Hub - Free Statistics Calculators and Learning Guides

Stat Study Hub helps you solve statistics problems quickly using free online statistics calculators. Each calculator is built to give more than a final answer. You get formulas, step-by-step solutions, and simple explanations that help you understand the result.

You can also explore our statistics articles to learn the concepts behind each calculation, from p-values and critical values to sample size, probability, mean, standard deviation, and hypothesis testing.

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Free Statistics Calculators by Topic

Choose a calculator category to solve statistics problems with formulas, steps, and explanations.

Descriptive Statistics Calculators

Calculate mean, median, mode, range, variance, standard deviation, quartiles, and data summaries.

Hypothesis Test Calculators

Find p-values, critical values, test statistics, and significance test results.

Probability Distribution Calculators

Calculate probabilities from normal, binomial, Poisson, and related distributions.

Sample Size Calculators

Estimate sample size, margin of error, and survey requirements for research studies.

Critical Value Calculators

Find z, t, chi-square, and F critical values for one-tailed and two-tailed tests.

P-Value Calculators

Calculate p-values from z, t, chi-square, F, and other common test statistics.

Most Used Statistics Calculators

Start with our most helpful statistics calculators for descriptive statistics, hypothesis testing, margin of error, and sample size planning.

P-Value Calculator

Calculate p-values from common test statistics and choose the correct tail for your hypothesis test.

Z Critical Value Calculator

Find left-tailed, right-tailed, and two-tailed z critical values using your significance level.

T Critical Value Calculator

Calculate t critical values using degrees of freedom, significance level, and test direction.

Standard Deviation Calculator

Find sample or population standard deviation and see how the spread of your data is calculated.

Mean Median Mode Calculator

Calculate the mean, median, mode, range, and other basic summaries from a dataset.

Population Mean Calculator

Compute the population mean from a complete set of values and view the formula used.

Margin of Error Calculator

Estimate the margin of error for surveys using confidence level, sample size, and proportion.

Sample Size Calculator

Estimate how many responses or observations you need for a survey or research study.

Cochran’s Sample Size Calculator

Use Cochran’s formula to estimate sample size for large populations and survey research.

Slovin’s Formula Calculator

Calculate sample size using Slovin’s formula when you know the population size and margin of error.

Yamane Formula Calculator

Estimate sample size using Yamane’s formula for finite populations and survey studies.

Coefficient of Variation Calculator

Calculate the coefficient of variation to compare relative variability between datasets.

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Learn the Statistics Behind the Calculations

Stat Study Hub is built for more than quick answers. Our statistics articles explain the formulas, concepts, and interpretation behind common calculations.

Use the calculators when you need fast results, then read the guides when you want to understand how the method works.

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Learning Topics

Basic statistics

Excel Tutorials

Probability & Distribution

Statistical Tables

Hypothesis Testing

p values

Why Students Love Stat Study Hub

Learning statistics is not always easy. There are formulas to remember, concepts to understand, and problems that can feel overwhelming. That is exactly why we built Stat Study Hub.

We combine clear tutorials with interactive calculators so you can learn and practice at your own pace. Whether you are starting with basic statistics or working on advanced topics, our resources are designed to help you calculate, understand, and apply statistics with more confidence.