The *Sample Size Calculator (web)* consists of:

- Means.
- Single mean.
- Two-mean comparison (independent).
- Two-mean comparison (paired) and standard deviation of difference.
- Proportions.
- Single proportion.
- Two-proportion comparison (independent).
- Two-proportion comparison (paired) [McNemar's test].
- Sensitivity and specificity.
- Pearson's correlation.
- Reliability.
- Structural Equation Modeling
- Animal study

This web version of the calculator started out as a project to convert the spreadsheet version into the version using JavaScript. Nowadays, the web version has more features than the spreadsheet version, for example, sample size calculators for confidence interval of *Pearson's correlation*, *Intraclass correlation coefficient*, *kappa coefficient* and *Cronbach's alpha coefficient*. It also includes the sample size calculator for animal study. New features will be added over time. Updates are logged in the ResearchGate project page.

APA: Arifin, W. N. (). Sample size calculator (web). Retrieved from http://wnarifin.github.io

Vancouver: Arifin WN. Sample size calculator (web) [Internet]. [cited ]. Available from: http://wnarifin.github.io

Sample Size Calculator by Wan Nor Arifin is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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© Wan Nor Arifin 2017-
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