T Test Calculator

Use this T Test Calculator to perform a 1-sample, 2-sample, or paired t-test and assess your sample means. All these t-test calculator will find p-values and construction confidence intervals. Just scroll down to find the t-test you need and click to expand it. Simply enter your data into the table. Or copy and paste from a spreadsheet and the table will add rows as needed. You can enter up to 300 data rows, and the calculator automatically ignores incomplete or invalid rows. The editable headers are used in the statistical results.

If you need help choosing which t-test to use or selecting the options in the t-test calculator, you’ll find additional information below the calculator. The default options are good for most cases. See all my Statistical Calculators!

Requires one sample of continuous data.

Requires two independent samples of continuous data.

Requires two dependent/pair samples.

If you need help choosing which analysis to perform in the T Test Calculator and knowing how to interpret it, read my article, T-Test Overview.

If you know which analysis to choose, you can get more information about it specifically in the following:

• 1-sample t-test
• 2-sample t-test (Independent Groups)
• Paired t-test (Dependent Groups)

In the T Test Calculator you can change the significance level. This setting affects the width of your confidence intervals. While the default of 0.05 is a good, standard choice, you can change it. Learn why in Significance Levels.

You’ll also need to choose either a one- or two-tailed test in the calculator. The default two-tailed test is the best for most situations. However, learn about why you’d change this setting in my article, One-Tailed and Two-Tailed Tests Explained.