FREE ONLINE TOOLFree T-Test
Free T-Test
Calculator
Advanced browser-based t-test calculator for one-sample, Welch, pooled independent, and paired t-tests with raw or summary data, confidence intervals, effect sizes, assumption coaching, reproducible reports, and local-only processing.
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About Free T-Test Calculator
Run one-sample, Welch, pooled independent, and paired t-tests from raw data or summary statistics. Get the test statistic, exact t-distribution p-value, confidence interval, standardized effect, descriptive diagnostics, and a copy-ready research report.
Workspace options
- Hypothetical mean (H₀)
- Alternative hypothesis
- Confidence level (%)
- Raw-data decimal format
Available actions
- ☼ / ◐
- One sample
- Independent groups
- Paired / repeated
- Raw data
- Summary stats