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Sample Size Shop

Free Sample Size Tools for Multilevel and Longitudinal Data

Calculate Sample Size Now — Use GLIMMPSE to calculate power or sample size. GLIMMPSE is an open-source online tool for calculating power and sample size. It’s been designed so that researchers and scientists with varying levels of statistical training can have access to reliable power and sample size calculations.

NEW Sample Size Software Upgrade

GLIMMPSE V3

– More designs – Easier to use

What's new with GLIMMPSE version 3

Offered by the University of Florida

Power and Sample Size for Multilevel and Longitudinal Study Designs

Learn the principles behind sample size calculations with this free online course.

Free online Sample Size course

Temporarily available

GLIMMPSE V2

GLIMMPSE V2 is no longer supported, but will be temporarily available while version 3 makes its debut.

Calculate with the previous version of GLIMMPSE

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