Download a trial version of Fathom for free! You can preview Fathom for a 20-minute session with the print, save, copy, and paste functions disabled. Purchase a license to unlock the full feature set!

See system requirements.

For help installing Fathom on your computer or network, and information about registering and deregistering Fathom:

• Download a step-by-step guide (.pdf) on installing Fathom and Key’s software license agreement.
• Download network installation guides (.zip) for four common networks.

Fathom is now sold by McGraw-Hill Education. To purchase, visit MHEonline.com. If you're a customer in a U.S. territory or outside the United States, find ordering information here.

The most current version of Fathom is 2.13. 

To see what version of Fathom you have installed, launch Fathom, choose Help | About Fathom (on a PC) or Fathom | About Fathom (on a Mac), and read the version number in the pop-up window. 

If your version of Fathom is not up-to-date, choose Help | Check For Updates to access a link to download the latest version. Release notes for minor updates are available. Updating your software is free but requires that you have a registered version of Fathom 2L, the downloadable version of Fathom. If your current version was installed from a CD, you’ll need to obtain a License Name and Authorization Code by calling McGraw-Hill Digital Technical Support at 800-437-3715. 

If your school or institution has a Fathom Version 1 license, you may be eligible to upgrade to Fathom Version 2 for a reduced price. Contact your McGraw-Hill sales representative.

For help learning to use Fathom, or for support using Fathom in the classroom, see these available resources. 

For professional development on integrating Fathom into your teaching, check out our online courses and free webinars, or sign up for a face-to-face workshop for your school.

1.) Is Fathom compatible with Mac OS 10.7 (Lion)?

There are no known issues with Fathom 2.13 and Mac OS 10.7.

2. Can I enter my own data into Fathom?

Yes. In Fathom, users can type into a case table or add multiple cases through a menu item.

3. Does Fathom come with tutorials?

Yes. You can access tutorials and instructional movies through Fathom's Help menu, or in the Resources section of this site.

4. Does Fathom come with data sets?

Yes, Fathom includes more than 300 data sets from a wide variety of areas—education, science, the social sciences, and sports, to name a few. Fathom provides seamless access to current and historical U.S. census microdata (data about individual people and households). There are also more data sets and links to good data websites in the More Data Sets section of this site.

5. Will Fathom help students pass the AP^® Statistics Exam?

Yes. Fathom's simple yet powerful simulation promotes students' conceptual understanding of statistics. Results of linear regression, confidence interval estimates, and statistical tests are embedded in text that explains what those results mean. (This "verbose" mode can be turned off to give students practice in reading and interpreting a more standard computer output, as required by the AP Statistics Course Description.)

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For additional support, please contact customer support at McGraw-Hill Education.