What is the Paired t-Test Calculator?
Calculate a paired t statistic from the mean and SD of within-pair differences. ITS Research Solution keeps the interactive tool above the explanation so you can calculate first and then review the method used.
Formula or method
t = mean difference / (SD difference / √n).
How to use this tool
Enter the requested values using consistent units, run the calculation and review the main result plus any supporting values. Use paired differences from before/after or matched observations.
Interpretation and limitations
The distribution of pair differences, not the original raw scores, is the key quantity for this test. Always check source data, units, rounding and discipline-specific requirements before using a result in assessed, published, regulated or high-stakes work.
Frequently asked questions
How is this result calculated?
t = mean difference / (SD difference / u221an).
Can I use this result in formal academic or research work?
Use it as a transparent calculation aid, then verify the assumptions, units, rounding and any institution-, journal- or field-specific requirements before formal use.