Download Quanto

We have reports that some virus scanners report a possible trojan virus in the above downloads. The virus scanner is detecting the Quanto executable file inside the downloadable file. There are no viruses in the download. However, if you wish to download a zip file containing the setup program, download one of the appropriate zip file and unzip it.

Download one of the following: 

Quanto is a program to calculate required sample size and power for genetic studies.

Please fill out the form to be notified when new versions of the program are available. You may download the file without filling in the form.

Important: We have had reports that the install program does not properly recognize accounts with administrative privileges. Windows XP and Windows 7 are the only OSs that appear to be effected. This appears to be caused by a security patch from Microsoft. An alternate installation program that doesn’t check for administrative privileges is located at the bottom of this page. This alternate installation program has fewer configuration options than the normal installation program.

Download and Installation

The program runs on Windows 95, Windows 98, Windows NT, Windows ME, Windows 2000, Windows XP, Windows Server 2003, Windows Server 2008, Windows Vista and Windows 7. Windows NT has an installation file that is different than the other versions of Windows.

Uninstall any previous version of Quanto. Changes have been made to the installation. Failing to uninstall the previous version may leave old files or registry entries on your system

Once you have downloaded the appropriate file and removed any previous versions of Quanto, do the following.

  • Log on with administrator privileges.
  • Run the program you downloaded.
  • Follow the onscreen prompts.
  • To uninstall Quanto go to the Control Panel and select Add/Remove programs and select Quanto 1.2.4.

Quanto - latest version 1.2.4, May 2009

Version 1.2.0 – Added the 2 degree of freedom test for the gene and interaction term together.

Version 1.2.1 – Fixed a bug in saving when the interaction term varied. Displays routines were updated.

Version 1.2.2 – Fixed a bug in the wizard for the inheritance mode. Fixed a display issue with varying parameters for continuous traits.

Version 1.2.3 – Fixed a bug in dialog for selecting the 2 degree of freedom test. It could not be selected using the wizards.

Version 1.2.4 – Improved function for calculating power for 2 degree of freedom test. This also fixed a bug that caused the program to exit to Windows. The installation program was updated to include support for Windows Vista.

This program computes sample size or power for association studies of genes, gene-environment interaction, or gene-gene interaction. Available study designs include the matched case-control, case-sibling, case-parent, and case-only designs. Quanto is a 32-bit Windows application requiring Windows 95, 98, NT, 2000, ME, XP, 2003, or Vista to run. The graphical user interface allows the user to easily change the model and view the results without having to edit an input file and rerun the program for every model. The results of a session are stored to a log file. This log can be printed or saved to a file for reviewing at a later date. An option is included to create a text file of the log that can be imported into other documents.