Creators
Md Jony Islam Author
Md Jony Islam
CalculatorToolsProjectExpert
Reviewers
Małgorzata Koperska, MD Steven Wooding
Last updated: November 14, 2025

P Value Calculator | Statistical Significance Made Easy

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P Value Calculator

P Value Calculator

Calculate p-values instantly for hypothesis testing. Enter sample data or test statistics to determine statistical significance with this P Value Calculator.

statistical significance calculator

A P-value calculator enables scientists to determine the p-value of a test within a short time. Entering the test statistic or the sample data allows the user to find out the likelihood of the data occurrence under the null hypothesis, which can be used to evaluate whether the data in the research study and in an experiment are statistically significant or not.

significance level calculator

The P Value Calculator is one online calculator that finds the statistical significance of the results of the test. The calculator can allow users to enter test statistics, degrees of freedom, and sample data, and the calculator gives the appropriate p-value. The tool can be useful in hypothesis testing, t-test, z-tests, and chi-square tests for students, researchers, and data analysts. It assists in getting the correct interpretation of results, saving time that would be used in making calculations by hand, and preventing inaccuracies. The calculator is easy to use, receptive, and it does not necessary to be installed.

Work, Installation, Input to Output

Work:

  • Accepts sample data, test statistics, or degrees of freedom.
  • Uses appropriate formulas for t-tests, z-tests, or chi-square tests.
  • Computes p-value to indicate statistical significance.

Installation: No installation required; works in any modern web browser.

Input:

  • Test Statistic (t, z, or chi-square)
  • Degrees of Freedom (if required)
  • Significance Level (optional)

Output:

  • P-value
  • Interpretation (e.g., significant or not significant)

Testing and Final Adjustments

Test P Value Calculator with known examples of t-tests, z-tests, and chi-square tests. Check the p-values that were calculated. Correct management of various input types (sample means, variances, and single values). Check error messages of missing, invalid, or negative data. A test of mobile responsiveness and desktop responsiveness. Instant updates on changes to inputs. Label input fields and calculated p-values clearly. Show interpretation messages (significant/ not significant) according to conventional alpha levels. Maximize the layout for readability. Make sure that they are compatible with rounded values and decimals.

Frequently Asked Questions - P Value Calculator:

What is a P Value Calculator?

A tool to calculate the p-value of a statistical test for significance.

How do I use it?

Enter the test statistic, degrees of freedom, and significance level to get the p-value.

What is a p-value?

The probability of observing the data assuming the null hypothesis is true.

Can it be used for t-tests?

Yes, it supports t-tests, z-tests, and chi-square tests.

Is it free?

Yes, the P Value Calculator is completely free online.

Can I use it on mobile devices?

Yes, it is fully responsive and works on all devices.

Who can use this tool?

Students, researchers, data analysts, and anyone performing hypothesis testing.

Does it show interpretation?

Yes, it indicates whether the result is statistically significant or not.

What happens if I enter invalid values?

The calculator shows an error message for missing or incorrect inputs.

Why is calculating p-value important?

It helps determine the statistical significance of research results and experiments.

Md Jony Islam

Md Jony Islam

Calculator Tools Project

Founder of Earthbondhon.com

a free online tools website designed to make everyday and engineering-related calculations easier for students, professionals, and hobbyists. The site offers a wide range of basic calculators across key categories, including Electrical Calculators, Electronic Calculators, and Time & Date Calculators.