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By using the free trial software, you agree to use it for evaluation purposes only. The NCSS trial software 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 NCSS 2023 free trial gives you an opportunity to evaluate the software before you purchase it. The trial version of NCSS 2023 is fully-functional for 30 days. Want to purchase a license? Click here.

When you click the download button with a valid email address, you can begin downloading the NCSS 2023 setup file.

You will receive an email with your trial license key that allows you to use 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 NCSS 2023 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.

NCSS 2023 is compatible with Windows only. Click here for a complete list of system requirements.

A Windows emulator (such as Parallels) is required to use NCSS 2023 on a Mac. Click here for more information.

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"PASS is a great program. It does so much and is easy to use. It’s much better than the other sample size programs I’ve used—it has helped me greatly in my research."

Ken Lawson, Ph.D., The University of Texas

"I had been using [another statistical software package] for over 15 years until recently when I noticed it would not run ANOVAs correctly. After researching numerous options I switched to NCSS and PASS and couldn't be happier. Your product is accurate, fast, easy to use, and very inexpensive. And thanks to the software’s flexibility in reporting and graphing, it has made my consulting business easier as well. Thank you!"

Ken Hansen, M.S., Mechanical Engineer and Applied Statistician