One Proportion Z-Test: Definition, Formula, Assumptions, and Example
A one-proportion z-test is one of the hypothesis tests used to determine whether a sample proportion is significantly…
Hypothesis Testing
Free Statistics Calculators
Free Statistics Calculators with Step-by-Step Solutions
Use Stat Study Hub to solve statistics and math problems online using free calculators. Find p-values, critical values, confidence intervals, sample sizes, descriptive statistics, probabilities, z-scores, fractions, and more with instant results and clear step-by-step solutions.
Whether you are checking homework, analyzing research data, preparing for an exam, or learning how a formula works, our calculators are designed to give you accurate answers and show the steps behind each result.
Free Calculators by Topic
Choose a calculator category below to find the right tool for your problem. Each category includes calculators that help you solve common statistics, probability, hypothesis testing, and math questions without doing every step manually.
Recently Added Calculators
Explore the latest calculator tools added to Stat Study Hub. These tools help you solve common problems in hypothesis testing, descriptive statistics, probability, sample size planning, fractions, and more.
Find the Right Calculator for Your Problem
Not sure which calculator to use? Start with the type of problem you are solving, then choose the matching calculator category.
| If you need to... | Use this calculator category |
|---|---|
| Find a p-value from a test statistic | P-Value Calculators |
| Find a cutoff value for a hypothesis test | Critical Value Calculators |
| Summarize a dataset using mean, median, standard deviation, or variance | Descriptive Statistics Calculators |
| Plan a survey, sample, or research study | Sample Size Calculators |
| Work with z-scores, percentiles, or normal probabilities | Normal Distribution Calculators |
| Run a statistical test and interpret significance | Hypothesis Testing Calculators |
| Solve probability distribution questions | Probability Calculators |
| Add, simplify, convert, or compare fractions | Fraction Calculators |
Why Use Stat Study Hub Calculators?
Statistical calculations can be confusing when you are not sure which formula to use, which value to enter, or how to interpret the final answer. Stat Study Hub calculators are built to make the process easier, faster, and clearer.
Enter your values, get an instant result, and follow the formula, substitution, and explanation where available. This helps you solve problems quickly while still understanding how the answer was found.
Instant Answers
Enter your values and get results immediately without doing every calculation by hand.
Step-by-Step Solutions
Many calculators show the formula, substitution, calculation steps, and final interpretation.
Built for Statistics Problems
Find tools for p-values, critical values, sample sizes, confidence intervals, probability, and more.
Simple Explanations
Use beginner-friendly explanations to understand what the result means and how to report it.
Guides That Support the Calculators
Our statistics guides explain the formulas, concepts, and manual steps behind the calculators. Use them when you want to understand why a calculator gives a certain answer or how to solve a problem by hand.
You can find guides on topics such as p-values, critical values, hypothesis testing, descriptive statistics, confidence intervals, probability distributions, and sample size formulas.
Read Statistics GuidesStatistics Guide Topics
Calculate Statistics Online for Free
Stat Study Hub gives you free statistics calculators for common problems in data analysis, probability, hypothesis testing, research planning, and descriptive statistics. Choose a calculator, enter your values, and get instant results with clear steps.
Recent Statistics Guides
Read beginner-friendly guides that explain formulas, examples, assumptions, and interpretation tips behind common statistics calculations.
Hypothesis Testing
Hypothesis Testing
How to Find a P-value from a Z-score
When performing a hypothesis test for a sample mean where the population standard deviation is known, or when…
Basic statistics
What is Margin of Error? Definition, Formula, and Examples
When reading survey results, especially in published work, you might come across a percentage followed by a ±…
Basic statistics
Population Mean: Definition, Symbol, Formula, and Examples
The population mean is the average value of all the observations in the entire group you want to…