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How to obtain AmberTools17

AmberTools is a free, useful standalone package and a prerequisite for installing Amber itself. The AmberTools suite is free of charge, and its components are mostly released under the GNU General Public License (GPL). A few components are included that are in the public domain or which have other, open-source, licenses. The libsander and libpbsa libraries use the LGPL license.

Most users should get the source code by filling out the form below. (For information about binary distributions, see the AmberTools17 page.) To download version 17 of the AmberTools distribution (about 330 Mb) please fill in the following form and click the "Download" button. The file size you should get is 359955025, and the md5sum is 5b245a59174138d661480a04b0cd8168.

Note: Installation instructions are in Chapter 2 of the 2017 Amber Reference Manual. More detailed instructions for many machines may be found at Jason Swails' blog page. We also have simplified requirements for MacOS, Linux and Windows 10.




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How to obtain Amber16

Amber16 facilitates faster simulations (on parallel CPU or GPU hardware) and is distributed with a separate license and fee structure. Click here for the Amber 16 License Agreement (PDF). Print this form, fill it out, sign and return (with your payment) to the address given at the bottom of the license agreement. Once your order is processed, you will receive download information via email. PDF versions of the Reference Manual are included in the download.


  • Academic/non-profit/government: $500 (US dollars).
  • Industrial (for-profit): $20,000 for new licensees, $15,000 for licensees of Amber 14.
  • Porting and demonstration licenses are available, as are licenses for computing centers are available: see the License Agreement for details.
  • Custom payment schedules or subscription-based approaches can be arranged: please send email to for more information.)

  • People who licensed Amber 16 after February 1, 2018 are eligible for a free upgrade to Amber 18. (This is not automatic: if you wish to obtain the new version, you need fill out and submit a new License Agreement, indicating that you are eligible for the upgrade.)

Payment for all orders for Amber must received prior to shipment of the Software. Payment must be via check, money order, or credit card (Mastercard/Visa/American Express). Make payments to: Regents, University of California. We are sorry, but purchase orders and wire transfers can no longer be accepted.

Once payment is received, an email will be sent to the address provided by the customer on the License Agreement containing a username and password, along with instructions on how to download the software.

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Last modified: Feb 10, 2018