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libgfortran-3.dll

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Recently Updated Verified Metadata AI Analysis x86-64 (64 bit) x86 (32 bit)

Download and install libgfortran-3.dll to fix missing or corrupted DLL errors.

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DLL Overview

Last Updated
Jul 1st, 2026
Filename
libgfortran-3.dll
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x86-64 (64 bit) x86 (32 bit)
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About libgfortran-3.dll

libgfortran-3.dll is a DLL file (Dynamic Link Library) used by Windows programs to share code and resources. It allows multiple applications to use the same functions, improving performance and reducing redundancy.

AI-assisted overview · Dec 12, 2025

Overview

What Is libgfortran-3.dll?

libgfortran-3.dll is the Windows runtime library for applications compiled with GNU Fortran (gfortran), specifically those built against the libgfortran version 3 ABI. Many scientific, engineering, mathematical, and simulation tools depend on this DLL when their numerical routines were compiled using the GNU Fortran toolchain.

  • Filename: libgfortran-3.dll
  • Company: (GNU Project)
  • Product: GNU Fortran Runtime Library
  • Description: Fortran runtime support library (version 3)

This DLL must be present for software compiled against libgfortran 3.x to run correctly on Windows.

What libgfortran-3.dll Does

The library provides the core Fortran runtime functionality required by applications written in or linked with Fortran modules, including:

  • Array operations and intrinsic functions
  • Mathematical and numerical routines
  • I/O operations (formatted and unformatted file handling)
  • Memory management used by Fortran code
  • Exception and error-handling support for Fortran programs

Any Windows application that includes Fortran-based components will load this DLL at startup.

Why Applications Request This DLL

Many engineering and scientific applications distributed on Windows use gfortran internally to implement:

  • Computational solvers
  • Numerical analysis modules
  • Simulation kernels
  • Mathematical libraries

When libgfortran-3.dll is missing, outdated, or mismatched, these programs fail to launch.

Common causes:

  • The DLL was not included in the application's installation folder
  • A newer or older version of libgfortran is present, causing ABI mismatch
  • Antivirus or cleanup tools removed the DLL

Where libgfortran-3.dll Should Be Installed

Most applications expect this DLL in the same folder as the executable.

Examples:

<application>/bin/
<application>/Runtime/
<application>/lib/

This file is not a Windows system component and generally should not be placed into System32 or SysWOW64.

Common Error Messages

Users may see:

libgfortran-3.dll is missing

The program can't start because libgfortran-3.dll was not found

Error loading shared library: libgfortran-3.dll

These errors indicate that the required Fortran runtime is either missing or incompatible.

How To Fix libgfortran-3.dll Issues

1. Restore the DLL into the application's directory

Place libgfortran-3.dll next to the program’s executable.

2. Match the correct version used by the application

Some software requires libgfortran-3, while others require newer versions such as libgfortran-4, libgfortran-5, etc.

A mismatch causes launch failures.

3. Reinstall the software

A full reinstall restores all required runtime libraries.

4. Check antivirus quarantine

If the file was removed:

  • Restore it from quarantine
  • Add the software folder to exclusions

Summary

libgfortran-3.dll is the GNU Fortran runtime library required by scientific, engineering, and numerical applications built with gfortran version 3. The DLL belongs in the application’s installation directory, and most errors arise from missing files or version mismatches. Restoring the correct DLL or reinstalling the application resolves the i

File information is supported by Human Assisted Artificial Intelligence and should be used as a helpful tool. However, it is important to keep in mind that this information may not be up-to-date or entirely accurate.

Troubleshooting DLL Errors

Most errors involving libgfortran-3.dll occur because the DLL is missing, corrupted, or outdated. In many cases, reinstalling the related application or replacing the DLL resolves the issue. The steps below cover the most common and reliable ways to fix these errors.

Windows DLL Error Examples

This application has failed to start because libgfortran-3.dll was not found. Re-installing the application may fix this problem.
libgfortran-3.dll Not Found.

Fixes and Solutions

The first step in resolving DLL errors is to completely uninstall the affected software and reinstall its latest version. We know this does not always solve the problem, which is why DLLme exists. If reinstalling the application does not help, or if you are unsure which app is causing the error, follow the steps below. These are the most common solutions for fixing libgfortran-3.dll errors.

  • Repair Windows: Make sure Windows is fully updated, then open Windows Terminal or PowerShell as an administrator (search for “PowerShell” in the Start menu, right-click it, and choose “Run as administrator”). This allows you to repair the Windows component store and run the System File Checker (SFC).

    Repair the Windows component store so SFC can pull clean files:

    DISM /Online /Cleanup-Image /RestoreHealth

    Scan all protected system files and automatically repair problems:

    sfc /scannow
  • Uninstall & Reinstall: On this DLL page, check the Company/Product section to identify the related app, then fully uninstall it. If you plan to continue using it, reinstall the latest version. Be sure to save or back up any important data before uninstalling. Windows or antivirus software may sometimes quarantine DLL files, especially if the DLL is unfamiliar or appears suspicious. Check your antivirus quarantine or logs to determine if this is the cause of your issue.
  • Download the DLL: Download the latest 32-bit or 64-bit version of the DLL directly from our repository using the download button above. Most users will need the 64-bit version, but if you are unsure, or if a 64-bit version is not available, you can install both the 32-bit and 64-bit DLLs. DLLme verifies DLLs that come from our admins, partners, and trusted affiliates. User-uploaded files may be verified later if a trusted source is confirmed.
  • Register the DLL: Most DLL files do not need registration, but some DLLs are COM components and must be registered to work correctly. If registration is required, open Windows Terminal or PowerShell as an administrator.

    Register the DLL (you can also drag the DLL file into the window to automatically fill in its full path): 

    regsvr32 "C:\path\to\libgfortran-3.dll"

    If you are registering a 32-bit DLL on 64-bit Windows, use the 32-bit RegSvr32: 

    C:\Windows\SysWOW64\regsvr32 "C:\path\to\libgfortran-3.dll"

    Or open Windows Terminal/PowerShell in the DLL’s folder and run: 

    regsvr32 libgfortran-3.dll

How to Install libgfortran-3.dll

To install libgfortran-3.dll, place the DLL file in the appropriate Windows system folder or in the same folder as the application’s .exe file. If you are not sure which version (32-bit or 64-bit) to use, you can safely install both.

On 64-bit versions of Windows, place 64-bit DLL files in:

C:\Windows\System32\libgfortran-3.dll

Place 32-bit DLL files in:

C:\Windows\SysWOW64\libgfortran-3.dll

Or place the DLL file next to the application’s .exe:

C:\path\to\exe\libgfortran-3.dll

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