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Sample size for a Confidence interval of a mean difference between paired samples

Confidence interval
Confidence Interval (%): 
Input
Standard deviation of differences: 
Confidence interval width (2-sided): 
Results
Minimum required sample size:

For details, see the MedCalc manual: Confidence interval sample size: Mean difference between paired samples.

How to cite this page

  • MedCalc Software Ltd. Sample size calculator for a Confidence interval of a mean difference between paired samples | MedCalc. https://www.medcalc.org/en/calc/sample-size-ci-difference-between-paired-samples.php (Version 23.6.1; accessed July 15, 2026)
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