Three simple steps
How to use this tool?
This free online converter translates Fortran source code into C in three simple steps.
- Step 1
Add your Fortran code
Type, paste, or upload the Fortran code you want to translate.
- Step 2
Convert the code
Click Convert to translate the source code into C.
- Step 3
Review the result
Review, copy, or download the resulting C code from the output editor.
See it in action
Examples of Fortran to C conversion
These examples show Fortran source code and the corresponding C translation. Generated results can vary as AI models are updated.
Example 1
Is String Palindrome
Program that checks if a string is a palindrome or not.
Fortran code
C code
Example 2
Even or Odd
A well commented function to check if a number if odd or even.
Fortran code
C code
Language comparison
Key differences between Fortran and C
| Characteristic | Fortran | C |
|---|---|---|
| Syntax | Fortran has a simpler syntax compared to C. | C has a more complex syntax compared to Fortran. |
| Paradigm | Fortran is primarily a procedural programming language, but it also supports object-oriented programming. | C is a procedural programming language, but it also supports some object-oriented programming concepts. |
| Typing | Fortran is a statically typed language. | C is a statically typed language. |
| Performance | Fortran is known for its high performance in scientific and engineering applications. | C is also known for its high performance and is often used in system programming and embedded systems. |
| Libraries and frameworks | Fortran has a wide range of libraries and frameworks for scientific and engineering applications. | C has a large number of libraries and frameworks for system programming, web development, and other applications. |
| Community and support | Fortran has a smaller community compared to C, but it still has active support and development. | C has a large and active community with extensive support and development. |
| Learning curve | Fortran has a steeper learning curve compared to C, especially for those who are new to programming. | C has a relatively easier learning curve compared to Fortran, but it still requires some effort to master. |
Common questions
Frequently Asked Questions
How do I convert Fortran to C?
Paste your Fortran code into the input box, confirm the languages are set to Fortran and C, and click Convert. CodeConvert AI analyzes your Fortran code and generates equivalent C code in seconds, preserving the original logic and structure.
What are the main differences between Fortran and C?
Fortran and C differ in syntax, type system, standard libraries, and common idioms, so copying code line for line usually will not compile. The converter maps each Fortran construct to its closest C equivalent. See the comparison table below for the key differences between Fortran and C.
Is the converted C code accurate?
The AI produces high-quality C code that preserves the behavior of your original Fortran code and follows C conventions. It handles common patterns, data structures, and idioms for both Fortran and C. For large or performance-critical code, review and test the C output before using it in production.
Can I convert an entire Fortran project to C?
You can convert Fortran files one at a time by pasting each file's code. For a full migration, convert each file and then review how classes, dependencies, and project structure map from Fortran to C. Signing in for free raises the input limit to 25,000 characters per conversion for larger files.
Can I convert C back to Fortran?
Yes. CodeConvert AI converts in both directions, so you can convert C to Fortran just as easily using our C to Fortran converter. Try the C to Fortran Converter
Is the Fortran to C converter free, and do I need to install anything?
Yes, it is free and runs in your browser with nothing to install and no IDE extension required. You can convert Fortran to C without an account for up to 2 conversions per day. Sign in for free for higher limits.
What are the benefits of signing in?
Signing in unlocks CodeConvert AI's Pro converter with more powerful AI models, a built-in chat assistant, code execution, saved conversion history, and personal notes. Every free account includes 5 credits and supports up to 25,000 characters of input per conversion, with no credit card required.
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