Intel® Fortran Compilers

Performance without compromise on Windows*, Linux* and OS X*

  • Broad support for current and previous Fortran standards, plus popular extensions
  • Intel® Math Kernel Library included in suites
  • Optional Rogue Wave* IMSL* Fortran Numerical Library on Windows

Try & Buy Intel® Fortran Compiler in:

Intel® Parallel Studio XE

A complete Fortran development environment for Windows*

  • Works with Microsoft* Visual Studio* 2010, 2012 and 2013
  • Don't have Visual Studio? No problem - a Fortran development environment based on Microsoft Visual Studio 2010 Shell is included - nothing else to buy!
  • Develop, build, debug and run from the familiar Visual Studio IDE, or build and run from the command line - your choice!
  • 32-bit and 64-bit development included - no extra charge!
  • Create traditional console applications or advanced graphical interfaces with QuickWin, OpenGL* and Windows API support
  • COM (Component Object Model) and .NET interoperability provided
  • Build mixed-language applications with C++, Visual Basic*, Microsoft C# and more! (requires Microsoft Visual Studio)
  • Tens of thousands of declarations of routines, types and constants for Windows API, OpenGL, POSIX, dialogs, multi-byte character support and more!

Intel Fortran integration into Microsoft Visual Studio

  1. Fortran project and source files in Visual Studio
  2. Fortran-aware text editor with context-sensitive help, Go To Definition, templates, coloring and more
  3. Debug Fortran code with full access to Fortran types and arrays
  4. Build and debug mixed-language programs in a single Visual Studio solution
  5. Set breakpoints at Fortran source lines, with optional conditions


Broad support for current and previous Fortran standards, plus popular extensions

  • Full language Fortran 95, full Fortran 2003, plus significant Fortran 2008 features
    • Coarrays
    • DO CONCURRENT
    • 31 array dimensions (standard specifies 15)
    • NEWUNIT in OPEN
    • Much more - see release notes for details
  • Also supports FORTRAN IV (FORTRAN-66), FORTRAN 77 and Fortran 90
  • Extensive OpenMP 4.0* support
  • Source compatible with Compaq Visual Fortran* - most projects just need a rebuild

Performance without compromise

  • Industry leading performance on Intel and AMD* processors.  Take a look at the benchmarks below that were run by Polyhedron* for independent confirmation.


Geomean time in seconds - lower is better
As published 3/10/2014 at http://www.polyhedron.com

  • Extensive optimizations for the latest Intel processors, including Intel® Xeon Phi™ coprocessor
  • Take advantage of multicore, manycore and multiprocessor systems with OpenMP, automatic parallelism, DO CONCURRENT, coarrays and Intel Xeon Phi coprocessor support
  • Patented automatic CPU dispatch feature gets you code optimized for the current running processor

Intel® Math Kernel Library

  • Included in Fortran suites that adds advanced math processing
  • Vectorized and threaded for highest performance on all Intel and compatible processors
  • De facto standard APIs for simple code integration
  • Compatible with all C, C++ and Fortran compilers
  • Royalty-free, per developer licensing for low cost deployment
  • Click here for more information.

Rogue Wave* IMSL* 7 Fortran Numerical Library

  • Optional add-on to the suites that include Intel Visual Fortran compiler
  • Superior accuracy and reliability through 40 years of refinement
  • A comprehensive set of 1000+ algorithms
  • Supporting parallel processing architectures since 1990
  • Evolves easily with software and hardware upgrades
  • Click here for more information and pricing

Outstanding support

  • One year of support included with purchase – gives you access to all product updates and new versions released in the support period plus access to Intel® Premier Support
  • Active user forums for help from experienced users and Intel engineers

Works with your familiar development environment

  • Uses gcc tools, including gdb debugger
  • Link compatible with C and C++ from gcc
  • 32-bit and 64-bit compilers included – no extra charge!

Broad support for current and previous Fortran standards, plus popular extensions

  • Full language Fortran 95, Full Fortran 2003, plus significant Fortran 2008 features
    • Coarrays
    • DO CONCURRENT
    • 31 array dimensions (standard specifies 15)
    • NEWUNIT in OPEN
    • BLOCK
    • Much more - see release notes for details
  • Also supports FORTRAN IV (FORTRAN-66), FORTRAN 77 and Fortran 90
  • Extensive OpenMP 4.0* support

Performance without compromise

  • Industry leading performance on Intel and AMD processors. Take a look at the benchmarks below that were run by Polyhedron for independent confirmation.


Geomean time in seconds - lower is better
As published 3/10/2014 at http://www.polyhedron.com

  • Extensive optimizations for the latest Intel processors including Intel® Xeon Phi™ coprocessor
  • Take advantage of multicore, manycore and multiprocessor systems with OpenMP, automatic parallelism, DO CONCURRENT, coarrays and Intel Xeon Phi coprocessor support
  • Patented automatic CPU dispatch feature gets you code optimized for the current running processor

Intel® Math Kernel Library

  • Included in Fortran suites that adds advanced math processing
  • Vectorized and threaded for highest performance on all Intel and compatible processors
  • De facto standard APIs for simple code integration
  • Compatible with all C, C++ and Fortran compilers
  • Royalty-free, per developer licensing for low cost deployment
  • Click here for more information

Outstanding support

  • One year of support included with purchase – gives you access to all product updates and new versions released in the support period plus access to Intel® Premier Support
  • Active user forums for help from experienced users and Intel engineers

Works with your familiar development environment

  • Build from command line or use Xcode integration (limited feature)
  • Link compatible with C and C++ from gcc
  • 32-bit and 64-bit compilers included – no extra charge!

Broad support for current and previous Fortran standards, plus popular extensions

  • Full language Fortran 95, full Fortran 2003, plus significant Fortran 2008 features
    • DO CONCURRENT
    • 31 array dimensions (standard specifies 15)
    • NEWUNIT in OPEN
    • BLOCK
    • Much more - see release notes for details
  • Also supports FORTRAN IV (FORTRAN-66), FORTRAN 77 and Fortran 90
  • Extensive OpenMP 4.0* support

Performance without compromise

  • Industry leading performance
  • Extensive optimizations for the latest Intel processors
  • Take advantage of multicore, manycore and multiprocessor systems with OpenMP, automatic parallelism, DO CONCURRENT
  • Patented automatic CPU dispatch feature gets you code optimized for the current running processor

Intel® Math Kernel Library

  • Vectorized and threaded for highest performance on all Intel and compatible processors
  • De facto standard APIs for simple code integration
  • Compatible with all C, C++ and Fortran compilers
  • Royalty-free, per developer licensing for low cost deployment
  • Included in Intel® Fortran Composer XE
  • Click here for more information

Outstanding support

  • One year of support included with purchase – gives you access to all product updates and new versions released in the support period plus access to Intel® Premier Support
  • Active user forums for help from experienced users and Intel engineers

Videos to help you get started.

  • Introduction to Intel® Visual Fortran in the Microsoft* Visual Studio* Development Environment
  • Optimizing your application with Intel® C++ and Fortran Compilers for Windows* and Linux*

Register for future Webinars


Previously recorded Webinars:

  • Update Now: What’s New in Intel® Compilers and Libraries
  • An Introduction to Intel® Visual Fortran Development on Intel® Xeon Phi™ coprocessor
  • OpenMP 4.0 for SIMD and Affinity Features with Intel® Xeon® Processors and Intel® Xeon Phi™ Coprocessor
  • Learn to be an Intel® Visual Fortran Power User
  • Optimizing and Compilation for Intel® Xeon Phi™ Coprocessor

More Tech Articles

What are PEEL and REMAINDER loops? (Fortran and C vectorization support)
By Martyn Corden (Intel)Posted 10/28/20140
The vectorization component of the optimization report produced by the Intel® Compiler version 15 may contain remarks such as: <Peeled> remark #15301: PEEL LOOP WAS VECTORIZED <Remainder> remark #15301: REMAINDER LOOP WAS VECTORIZED The compiler does its best to create an effi...
Diagnostic 15319: Using NOVECTOR directive
By Devorah H. (Intel)Posted 10/02/20140
Product Version: Intel(R) Visual Fortran Compiler XE 15.0.0.070  Cause: When using NOVECTOR directive in code, the vectorization report generated using Visual Fortran Compiler's optimization and vectorization report options ( -O2 -Qopt-report:2) includes non-vectorized loop instance.  Example:...
Diagnostic 15304: non-vectorizable loop instance
By Devorah H. (Intel)Posted 10/02/20140
Product Version: Intel(R) Visual Fortran Compiler XE 15.0.0.070   Cause: The vectorization report generated using Visual Fortran Compiler's optimization and vectorization report options (-Qvec-report2 -O2) includes non-vectorized loop instance when using the following compiler option (Win OS): ...
Mapping of Intel® MPI Library versions to bundle suites
By Gergana Slavova (Intel)Posted 08/28/20140
Introduction: Mapping the Intel® MPI Library numbers to specific suites and update versions Intel® Parallel Studio XE 2015 Update 1 Cluster Edition (released 26 November 2014) Intel® MPI Library 5.0 Intel® Registration Center Activation Date (yr.mo.day) Windows Version / build Linu...
Subscribe to Intel Developer Zone Articles

Supplemental Documentation

Intel® MKL Sparse BLAS Overview
By Naveen Gv (Intel)Posted 06/25/20120
Sparse BLAS routines can be useful to implement iterative methods for solving large sparse systems of equations or eigenvalue problems
Intel Guide for Developing Multithreaded Applications
By adminPosted 01/16/201224
The Intel® Guide for Developing Multithreaded Applications covers topics ranging from general advice applicable to any multithreading method to usage guidelines for Intel® software products to API-specific issues.
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You can reply to any of the forum topics below by clicking on the title. Please do not include private information such as your email address or product serial number in your posts. If you need to share private information with an Intel employee, they can start a private thread for you.

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Intel Parallel Studio XE 2016 Beta has Started!
By Steve Lionel (Intel)4
The beta test for Intel Parallel Studio XE 2016, including Intel Fortran Compiler XE 16.0, has begun. For more details, a FAQ and a registration link, see Intel® Parallel Studio XE 2016 Beta Major Fortran features supported in this release are: Submodules from Fortran 2008 IMPURE ELEMENTAL from Fortran 2008 "Further Interoperability with C" features from TS29113 (Fortran 2015 draft) For more details see the release notes. Please use Intel Premier Support for any problems you encounter, rather than this forum. If you have questions about Fortran language features, you can ask them in this forum. Please note that the compiler in the initial beta version was built a couple of weeks ago and doesn't include all of the fixes you may have seen described as "fixed in a release later this year". The remainder of this post will be kept updated on "things you should know" about the beta. The current beta includes VS2010 Shell. A beta update will include VS2013 Shell instead. VS2010 Shell wi...
Webinar May 13 - What's New in Intel Fortran 16.0
By Steve Lionel (Intel)8
Wed, May 13, 2015 12:00 PM - 1:00 PM EDT This session will cover new features in the Intel® Fortran compiler version 16, part of Intel® Parallel Studio XE 2016. Topics include new features from Fortran standards, new OpenMP* features and changes for users of Microsoft Visual Studio*. Register here This session will be recorded and the recording made available sometime afterward.
fwglGetProcAddress (OpenGL + Windows + Intel Fortran)
By Russell G.0
I am trying to use OpenGL functions that are not directly supported by Windows, which only supports GL functions up to OpenGL 1.1. Supposedly the  the wglGetProcAddress function allows access to functions supported by the graphics hardware from following versions of OpenGL. Here's what I'm trying to do....        hWnd = CreateOpenGLWindow( ... )       hDC  = GetDC(hWnd)       hRC  = fwglCreateContext(hDC)       hret = fwglMakeCurrent(hDC, hRC)       anam = 'glGenVertexArray'C       f    = fwglGetProcAddress(LOC(anam))  When I run this code I get f = zero, which indicates (I think) that function is not supported. I've tried this with various functions with similar results. This particular one is an OpenGL 3.0 function, and my graphics card is a relatively modern AMD Radeon which claims to support up to OpenGL 4.1. so it should be available. Questions:  Am I calling fwglGetProcAddress correctly (should I use C_LOC instead)?  If I did get a function address back from this call to fwg...
IMSL routines use
By joe s.2
I am supposedly running Visual Fortran Composer XE with IMSL routines on a stand-alone PC. I do not see to have access to the IMSL routines. How could I verify if I indeed have these routines on my PC? Any help would be welcome here. Many thanks, Joe S.
Can't run 32 bit executables on Windows XP
By Bob W.1
On a Windows 7 machine I use ifort to create a simple 32 bit hello world program. It runs fine on Windows 7.  The GNU file program gives this description: hello.exe: PE32 executable for MS Windows (console) Intel 80386 32-bit But when I try to run that same hello.exe progrram on a 32 bit Windows XP machine the OS complains that it's not a valid 32 bit executable. So what do I have to do to get executable that will run on a 32 bit Windows XP machine?      
Array of Parameterized derived data types with different length type parameters
By Scott B.3
I have been unable to find any documentation, so it may not be possible, about being able to make an array of parameterized derived data types with different length parameters. I have done some simple tests, but I get strange compiler results where multiple allocations seem to overwrite the preceding one, rather than raise an error.   TYPE MAT_TYPE(N) INTEGER,LEN::N REAL,DIMENSION(N )::X REAL,DIMENSION(N,N )::A REAL,DIMENSION(N,2*N)::B END TYPE TYPE ARRAY_OF_MAT TYPE(MAT_TYPE(:)),DIMENSION(:),ALLOCATABLE:: MAT END TYPE TYPE (ARRAY_OF_MAT) :: GRP  In the above example code, I'd like to be able to allocate MAT within GRP such that each has a different length parameter as follows:   !FIRST ALLOCATE MAIN DIMENSION --this sometimes causes a compiler error ALLOCATE(TYPE(MAT_TYPE(:)::GRP%MAT(10)) ! !NEXT ALLOCATE EACH OF THE PARAMETERIZED DIMENSIONS --these work without the preceding allocation ALLOCATE(TYPE(MAT_TYPE(50)::GRP%MAT(1)) ALLOCATE(TYPE(MAT_TYPE(80...
No FORTRAN compiler intergration in VS2010 after install latest update.
By Ken4
I just installed the latest update and everything during the install looked normal with no errors, but the FORTRAN compiler was not integrated into the Visual Studio 2010.  The solution configurations windows are greyed out and no compiler is found in the options menu.  I use the provided VS that comes with Visual FORTRAN and I am running Windows 8.1 on desktop with the latest updates.  The version before this was working fine.  I would appreciate any help you can provide.
module compile problem
By juro m.2
Hello,  im relative new in fortran so i have one problem. Im using "VS 2010" with "Intel(R) Visual Fortran Compiler XE 15.0.0.108 [IA-32]" compiler. When i try to compile module like it say in book Numerical Recipes in Fortran 90:   "First, locate the important files nrtype.f90, nrutil.f90, and nr.f90, as listed in Appendices C1, C1, and C2, respectively. These contain modules that either are (i) used by our routines, or else (ii) describe the calling conventions of our routines to (your) user programs. Compile each of these files, producing (with most compilers) a .mod file and a .o (or similarly named) file for each one."  it gives me error:  Error    1     error LNK2019: unresolved external symbol _MAIN__ referenced in function _main    libifcoremdd.lib(for_main.obj)     Error    2     fatal error LNK1120: 1 unresolved externals    Debug\recepti.exe     So i go to project properties - fortran - libraries and change Use intel math kernel libary to paralel (or any other) and a...
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You can reply to any of the forum topics below by clicking on the title. Please do not include private information such as your email address or product serial number in your posts. If you need to share private information with an Intel employee, they can start a private thread for you.

New topic    Search within this forum     Subscribe to this forum


Intel Parallel Studio XE 2016 Beta has Started!
By Steve Lionel (Intel)4
The beta test for Intel Parallel Studio XE 2016, including Intel Fortran Compiler XE 16.0, has begun. For more details, a FAQ and a registration link, see Intel® Parallel Studio XE 2016 Beta Major Fortran features supported in this release are: Submodules from Fortran 2008 IMPURE ELEMENTAL from Fortran 2008 "Further Interoperability with C" features from TS29113 (Fortran 2015 draft) For more details see the release notes. Please use Intel Premier Support for any problems you encounter, rather than this forum. If you have questions about Fortran language features, you can ask them in this forum. Please note that the compiler in the initial beta version was built a couple of weeks ago and doesn't include all of the fixes you may have seen described as "fixed in a release later this year". The remainder of this post will be kept updated on "things you should know" about the beta.
Webinar May 13 - What's New in Intel Fortran 16.0
By Steve Lionel (Intel)0
Wed, May 13, 2015 12:00 PM - 1:00 PM EDT This session will cover new features in the Intel® Fortran compiler version 16, part of Intel® Parallel Studio XE 2016. Topics include new features from Fortran standards, new OpenMP* features and changes for users of Microsoft Visual Studio*. Register here This session will be recorded and the recording made available sometime afterward.
OS X 10.9 Xcode 5 error ld: library not found for -lcrt1.10.6.o
By Ronald W Green (Intel)0
Environment:  OS X 10.9 (Mavericks) and Xcode 5.0 Command line compilations/links fail with "ld: library not found for -lcrt1.10.6.o" Affected compiler:  Intel Composer XE 2013 Update 1 Root cause:  Xcode 5.0 installation does not install all command line tools (include files, libraries, SDKs) need for the compiler to link user applications.  FIX: Install the Xcode 5.0 "Command Line Tools".  Follow this Knowledge Base article for installation of this package:  http://software.intel.com/en-us/articles/installing-intel-compilers-for-os-x-pre-requisite-xcode-command-line-tools
Compiler Installation and Uninstallation Help, Linux and Mac OS
By Ronald W Green (Intel)7
  Installing the Intel compilers on Linux* and Mac OS* X requires that you install various prerequisite packages. Linux: Read this Help on Installing the Intel Compilers. Mac OS X: Read this article on Xcode and Command Line tools installation (prerequisite for installation and use) We also have an article on Linux Silent or Non-Interactive Installation Here And Mac OS X Silent or Non-Interactive Installation Here Having trouble REMOVING or UNINSTALLING the Intel Linux compilers?  Read this article: http://software.intel.com/en-us/articles/uninstall-intel-compiler-for-linux-when-uninstallsh-is-missing-or-not-functioning NOTE: ARTICLES such as this are not monitored on a regular basis - do NOT ask questions here, your quesiton may go unnoticed.  Please post all questions to the USER FORUM
ld: cannot find -lm
By Ronald W Green (Intel)1
RHEL 6.x, FC14, FC13, FC12, SL6.x, CentOS 6, etc. and possibly other recent distributions: error when using -static or -fast: ld: cannot find -lm See this article: http://software.intel.com/en-us/articles/error-ld-cannot-find-lm/
Questions about Intel® Software Development Suite Student Edition for OS X
By Belmiro C.3
Hi, I have some questions about Intel® Software Development Suite Student Edition for OS X: http://softwarestore.ispfulfillment.com/store/Product.aspx?skupart=I23S97 1. As shown in "product info", Intel Software Development Suite Student Edition for "Linux" and "Windows" includes the MKL. However, it seems that Intel Software Development Suite Student Edition for "Mac OS X" does not !?!?! Is it true??? 2. As shown in https://software.intel.com/en-us/articles/intel-fortran-composer-xe-2013... , it indicates that the Intel® Fortran Composer XE 2013 for OS X* only supports upto OS X* 10.8 “Mountain Lion". Therefore, how about the intel Fortran Composer XE for Mac OS X  in this Intel® Software Development Suite Student Edition?? Can it support OS X 10.9 and 10.10?? Thank you!! Belmiro
Small program segfaults on READ from internal file
By Øyvind J.2
The following program gives a segfault with Intel 15.0.2 on Linux: PROGRAM read_empty_substing CHARACTER(LEN=20) :: c_in = "hello" CHARACTER(LEN=20) :: c_out INTEGER :: i_iostat ! These statements give a segfault with Intel 15.0.2 READ(c_in(2:1), '(A)') c_out READ(c_in(2:1), '(A)', IOSTAT=i_iostat) c_out ! The following statements give end-of-file as expected: !READ(c_in(2:1), *) c_out !READ(c_in(2:1), *, IOSTAT=i_iostat) c_out print *, TRIM(c_out) END PROGRAM As you can see, we try to read from an empty substring of c_in, and I do expect an error condition, i.e. i_iostat/=0. Instead I get a segfault. The read statements with format string segfaults, while the list directed read gives end-of-file. Am I supposed to check the length of the internal file before I read from it, or could this be a compiler bug? Øyvind ------------------------ (gdb) run Starting program: /fs/auto/home/oyvindj/tmp/read_segfault/a.out [Thread debugging using libthread_db enabled] ...
Compiler internal error in type overloading
By F R.1
I took an example of type overloading from a website and unfortunately on compilation with ifort I am getting an internal error. The code is attached herewith to look at. 
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