Two-Sample t-Test (Independent) Calculator

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Hypothesis Test Calculator

Choose a test family, enter your sample information, and review the decision, assumptions, effect size, and step-by-step work in one place.

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Calculator Resources

Guidance for choosing inputs, checking assumptions, and interpreting the active Welch or pooled independent two-sample t-test.

Choose Summary Statistics when you already have the sample summaries, or Raw Data when you want the calculator to compute them.
Enter the null value and select the alternative hypothesis before running the test.
Click Run Test, then use the output tabs to inspect the result, chart, interpretation, assumptions, and steps.

Welch is usually the safer default, especially when sample sizes or variances differ. Use pooled only when the equal-variance assumption is part of your analysis plan.

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Two‑Sample Mean t‑Test (Independent)

1. Enter Your Sample Data

Sample 1 (Group 1)

Sample 2 (Group 2)

2. Set Your Test Parameters

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