What is the Dropout Rate Calculator?
Calculate participant dropout or attrition rate during a study. ITS Research Solution keeps the interactive tool above the explanation so you can calculate first and then review the method used.
Formula or method
Dropout rate = (enrolled − completed) / enrolled × 100%.
How to use this tool
Enter the requested values using consistent units, run the calculation and review the main result plus any supporting values. If 200 enroll and 180 complete, dropout is 10%.
Interpretation and limitations
Distinguish true study dropout from protocol exclusions, missing visits or loss to follow-up where relevant. 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?
Dropout rate = (enrolled u2212 completed) / enrolled u00d7 100%.
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.