FFTW - Fastest Fourier Transform in the West

Technology

FFTW" stands for "Fastest Fourier Transform in the West." FFTW is a C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions, of arbitrary input size, and of both real and complex data, as well as of even/odd data, i.e., the discrete cosine/sine transforms, or DCT/DST.

FFTW’s speed is superior when compared to other publicly-available DFT programs and its performance is highly competitive with that of vendor-driven solutions. FFTW is also portable, so it will work well on most architectures without modification – something vendor-driven custom applications cannot match.

Ready to Sign License Available

What type of license is right for me?

FFTW is available under two distinct licensing options:

1.    Free Open Source License

The GNU GPL version of FFTW is made available via Open Source licensing. You are free to redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation.

2.    Commercial License Options and Pricing

FFTW has four versions: version 3.3.x, version 3.2.2, version 3.1.2, and version 2.1.5. Non-exclusive commercial licensing rights are granted under the four types of licenses below for each version.

  • Commercial License
  • License to Non-Profit Organization
  • License to US Government Contractor
  • License to US Government Agency

Licensing

Ready to take a license?

Once you are clear as to which option is right for you, you may complete the steps for license using one of the Ready to Sign licenses downloaded from the table below.

All licenses, including academic licenses, are between MIT and your company, university or institution, and not you (or a faculty member) individually. The license must be signed by an authorized representative at your company, university or institution.

Questions? Please e-mail software-licenses@mit.edu

Ready To Sign Licenses: 

FFTW

License by Version: 
FFTW v. 3.3.x
Commercial License
License to Non Profit Organization
License to Government Contractor*
License to Government Agency*
FFTW v. 3.2.2
Commercial License
License to Non Profit Organization
License to Government Contractor*
License to Government Agency*
FFTW v. 3.1.2
Commercial License
License to Non Profit Organization
License to Government Contractor*
License to Government Agency*
FFTW v. 2.1.5
Commercial License
License to Non Profit Organization
License to Government Contractor*
License to Government Agency*