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Two-Sample Independent t-Test Calculator

t = (x̄1−x̄2) / SE_diff — Welch's two-sample t-test.

Calculates Welch's t-statistic and approximate degrees of freedom for comparing means of two independent samples.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

SE = √(s1²/n1 + s2²/n2); t = (x̄1−x̄2)/SE

In depth

Calculates Welch's t-statistic and approximate degrees of freedom for comparing means of two independent samples.