Skip to main content

Z-Score Calculator

All fields marked with an asterisk ( * ) are required.

Selecting a Type of Standardized Measurement will create additional fields.

The subject must be between 5 and 23 years old at the time of the scan date.

Unit of Measurement will be displayed once type of Bone Site is selected.

Clicking the "Calculate" button at the button of the page creates a new page of results and moves focus there.











Note: The Z score calculator has been updated as of 7/4/2012 (ref: Zemel et al 2013). In addition, the height adjusted Z score calculator was updated on October 29, 2012. Please note that height adjusted Z scores generated from this website from 8/28 to 10/28/2012 were not accurate. This calculator can only be used for Hologic systems with software version 12.1 or higher. The supporting data for the calculator are exclusively from longitudinal measures of children living within the United States. The Z score and other text presented on these pages is for your information only. Data captured from this screen will not be saved in any database.

Informational Content Disclaimer:
The information provided using this Web site is only intended to be general summary information to the public. It is not intended to take the place of either the written law or regulations. It is not NIH's intention to provide specific medical advice to users of the NIH Web site, instead we provide users with information to help them better understand their health, diagnosed conditions, and the current approaches related to treatment, prevention, screening, and supportive care. NIH urges users to consult with a qualified health care professional for diagnosis and answers to their personal medical questions. Press releases and other materials meant for public use will not be posted to the NIH Web site unless they were developed by or for NIH

Privacy: Protecting your privacy is very important to us. Our Web site links to other National Institutes of Health (NIH) sites, federal agency sites and occasionally, to private organizations. Once you leave the primary NIH.gov site, you are subject to the privacy policy for the site(s) you are visiting. We do not collect any personally identifiable information (PII) about you during your visit to this NIH Web site. The PII requested is used only to return results to you, and is not captured or stored by the application. You may choose to use your own identifiers in place of First and Last Name; other fields must be accurate. We do, however, collect some data about your visit to our Web site to help us better understand how the public uses the site and how to make it more helpful. We collect information from visitors who read, browse, and/or download information from our Web site. NIH never collects information for commercial marketing or any purpose unrelated to the NIH mission and goals

PDF File Plugin:
Download the Adobe Reader® External Web Site Policy to view PDF files.

If you need help accessing a PDF document, please view Accessing PDF Documents with Assistive Technology: A Screen Reader User's Guide External Web Site Policy (PDF - 368 KB).