EES - Student ($160) (single-user for one year)

A link to the installation program will be sent automatically. A license (*.dft) file and specific installation instructions will be emailed to you within 48 hours.

EES - Commercial

Single User License ($600) (Includes Instant Update and Technical Service for one year)
5 User License ($2400) (Includes Instant Update and Technical Service for one year)
10 User License ($3900) (Includes Instant Update and Technical Service for one year)
20 User License ($6000) (Includes Instant Update and Technical Service for one year)
Academic License ($3000) (Includes one year of Academic Update Service)

*Please contact us for pricing for more than 20 user licenses.

EES - Professional 32-bit (works on all 32 and 64-bit Windows Systems)

Single User License ($1200) (Includes Instant Update and Technical Service for one year)
5 User License ($4800) (Includes Instant Update and Technical Service for one year)
10 User License ($7800) (Includes Instant Update and Technical Service for one year)
20 User License ($12000) (Includes Instant Update and Technical Service for one year)
Academic License ($4750) (Includes one year of Academic Update Service)

*Please contact us for pricing for more than 20 user licenses.

EES - Renewal of Instant Update and Technical Service (IUTS) for One Year

When purchasing, you will need to supply your EES Registration Number. (See first screen of software for number.) Note that IUTS cannot be renewed if 4 or more years have passed since the IUTS expiration date.

Commercial, less than 12 months past expiration ($120)
Commercial, >12 and <48 months past expiration ($240)
Professional, less than 12 months past expiration ($240)
Professional, >12 and <48 months past expiration ($480)
5 User Commercial, less than 12 months past expiration ($480)
5 User Commercial, >12 and <48 months past expiration ($960)
5 User Professional, less than 12 months past expiration ($960)
5 User Professional, >12 and <48 months past expiration ($1920)
10 User Commercial, less than 12 months past expiration ($780)
10 User Commercial, >12 and <48 months past expiration ($1560)
10 User Professional, less than 12 months past expiration ($1560)
10 User Professional, >12 and <48 months past expiration ($3120)
20 User Commercial, less than 12 months past expiration ($1200)
20 User Commercial, >12 and <48 months past expiration ($2400)
20 User Professional, less than 12 months past expiration ($2400)
20 User Professional, >12 and <48 months past expiration ($4800)

*Please contact us to order Instant Update and Technical Service for more than 20 user licenses.

EES - 64-bit Professional License File Upgrade

An existing Professional 32-bit license with current IUTS is required for this purchase. See the 64-bit information page before ordering.

*Please contact us for pricing for more than 20 user licenses.

EES - Academic Update Service (AUS)

Update service expired on Sept. 1, 2020 if Academic Update Service has not been previously purchased.

EES_REFPROP Interface

Note that the number of users for the EES_REFPROP interface must match the number of users for the EES license. A valid license for the NIST REFPROP program is required when using the EES_REFPROP Interface.

Single User License ($1000)
5 User License ($3000)
10 User License ($5000)
20 User License ($7500)
Academic License ($3750)

EES_REFPROP Interface Update

The current EES_REFPROP interface was released on May 3, 2023. Click here for a description of new features. There is no cost to update if you purchased the interface less than one year ago. Place an order to update the interface if your interface was purchased more than one year ago.

Single User License ($200)
5 User License ($600)
10 User License ($1000)
20 User License ($1500)
Academic License ($750)

EES_REFPROP 64-bit Interface Upgrade

An existing EES_REPPROP Interface is required to order the 64-bit license. See the 64-bit information page before ordering.

Single User 64-bit upgrade ($200)
5 User License upgrade ($600)
10 User License upgrade ($1000)
20 User License upgrade ($1500)
Academic License upgrade ($750)

Mastering EES ($25 for single copies. Order 5 copies for use by all students and faculty in an Academic Department. )