Research

Software for power and sample size calculations

Numerous free and/or open source programs are available for performing power and sample size calculations. These include:

• G*Power (http://www.gpower.hhu.de/)
• powerandsamplesize.com Free and open source online calculators
• PS
• PowerUp! provides convenient excel-based functions to determine minimum detectable effect size
  and minimum required sample size for various experimental and quasi-experimental designs.
• R package pwr
• Russ Lenth’s power and sample-size page
• WebPower Free online statistical power analysis (http://webpower.psychstat.org)
• SampSize app for Android and iOS iPhone and iPad (https://www.epigenesys.org.uk/portfolio/sampsize/)