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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.

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Free Trial

The PASS 2020 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 2020 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 2020 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 2020 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 2020 on a Mac. Click here for more information.

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Your support is always amazing. I also run [another statistical software package] and on a support / admin basis you guys are way ahead.

Neale Penman, Researcher

As Statistician teaching statistics in the University, I have to say that NCSS is the tool that I have used since 1997. With all the procedures that you need for research or to make a good, informative presentation, it can be used for teaching in a university. Here in Idesem-Chile we have found it to be the best tool to support our measurement activities. I recommend this tool to make your job more enjoyable!

Frank Gallardo Pastore, Ph.D, AIU, CEO