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By using the free trial software, you agree to use it for evaluation purposes only. It is not to be used for actual research, study planning, or otherwise, whether academic, commercial, government or education.

Your trial license key will be sent to this email.
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Free Trial

The PASS 2024 free trial gives you an opportunity to evaluate the software (with a restriction on alpha) before you purchase it.

When you click the download button with a valid email address, you can begin downloading the PASS 2024 sample size software setup file.

You will receive an email with your trial license key that allows you to evaluate the software for 30 days. If you choose to purchase the software, you can use the license key you receive to convert the trial version into the fully-functional version. You will not need to reinstall PASS 2024 sample size software after you purchase a license.

We’ll periodically send you emails with product information and tutorials to get you started. You can unsubscribe at any time. Your email address will never be sold or given to a 3rd party.

PASS 2024 will never collect nor transmit any data or settings that you input into the software, any data related to intermediate calculations, nor any output data or results that are generated by the software. PASS 2024 will report the types and frequency of the procedures and tools being used. This will help us better understand which procedures and tools are most-often used and identify potential improvements.

PASS 2024 is compatible with Windows only. Click here for a complete list of system requirements.

A Windows emulator (such as Parallels) is required to use PASS 2024 on a Mac. Click here for more information.

Trouble Downloading?
Get help downloading the PASS Free Trial by contacting us.

NCSS is an excellent tool for clinical and epidemiological research that is both user friendly and economical with excellent support. It removes the "fear of statistics" from clinical research and makes research accessible to all curious clinicians.

—Ted Rosenberg, MD MSc. FRCP(C), Clinical Assistant Professor, University of British Columbia

I have been using NCSS in my high school class room for 22 years. I find it very easy to use and my students use it to calculate their results for their lab reports, science fair projects, and now they are using it for AP Research projects. It can be used for everything from the basics to the most advanced statistics. NCSS is very affordable for any high school budget.

—David Buncher, High School Teacher, Miami, FL

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