Silverfrost FTN95 is one of the few compilers that was specifically built for Windows. They offer a for home or evaluation use.
First, a quick tip: you won’t find many "Fortran 77-only" compilers today. Instead, modern compilers like are "backwards compatible." This means they can compile .f or .for files (F77) just as easily as modern F2018 code. 1. GNU Fortran (gFortran) via MinGW-w64
Download the MinGW-w64 installer from SourceForge and install it with the settings described in Section 1. After installation, verify by typing gfortran --version in Command Prompt. For the latest and most up-to-date toolchain, advanced users may prefer the MSYS2 installation method described earlier, which provides access to the most recent GCC versions.
gfortran -std=legacy hello.f -o hello.exe
is part of the GCC (GNU Compiler Collection). It is the most popular, modern, and actively maintained free Fortran compiler. While it is a modern compiler, it has excellent backward compatibility for Fortran 77. fortran 77 compiler for windows 10 64-bit free download
Download MSYS2 and use its terminal to install the mingw-w64-ucrt-x86_64-gcc-fortran package. 2. Intel oneAPI Fortran Compiler ( ifx / ifort )
The compiler can be downloaded from: https://ftp.sunet.se/mirror/archive/ftp.sunet.se/pub/simtelnet/msdos/fortran/bcf7713b.zip . To use it on Windows 10, install first, then run BC-FORTRAN 77 within the DOSBox environment.
Will you be compiling or a massive legacy codebase ? Do you prefer a graphical IDE or using the Command Prompt ?
The output should display "Hello, Fortran 77 World!" on your screen. Silverfrost FTN95 is one of the few compilers
| Compiler | 64-bit native? | IDE included? | Best for | |---------------------|----------------|---------------|--------------------------------| | gFortran (MinGW-w64) | Yes | No (use VS Code/Notepad++) | Production, standards | | Silverfrost FTN77 | No (32-bit) | Yes (Plato) | Learning, quick testing | | MSYS2 + gFortran | Yes | No | Unix-style development |
This is a heavy download (several gigabytes) and is intended for professional-grade performance. It is fully 64-bit compatible and handles F77 code with ease. How to Compile Your First F77 Program
Choose only for retro computing curiosity or if you have very specific minimalistic needs that justify running DOSBox.
The free version may show a "nag screen" or have limitations for commercial use. Crucial Tips for Fortran 77 on Windows 10 Instead, modern compilers like are "backwards compatible
Now that we have installed gfortran, let's discuss how to use it. Here's a simple example:
Simply Fortran is and has been tested for compatibility with Windows 7, 8, 10, and 11. It supports Fortran 77 source code along with modern standards.
If you prefer an all-in-one package with a graphical user interface, is a dedicated, lightweight IDE built specifically for Fortran 77. It bundles an older but highly functional version of the G77/Gfortran compiler.
It handles the complex installation of GFortran automatically and provides a modern editor, debugger, and project management tools in one place. How to Compile Fortran 77 on Windows 10/11 (64-bit)