The T-Distribution Calculator computes the p-value for a given t-score and degrees of freedom, allowing users to assess statistical significance in t-tests. It supports one-tailed and two-tailed tests, helping determine the likelihood of observing a value as extreme as the given t-score under the null hypothesis. This tool is essential in inferential statistics when sample sizes are small or the population variance is unknown, providing insight into the strength of evidence against the null hypothesis.