Autodesk AutoCAD data
File type: Various data file, Text file
A cof file is an ASCII data file associated with Autodesk applications, including the AutoCAD family.
It stores engineering coefficients and related data used by Autodesk civil design tools.
Found 3 different file type records with the same cof filename suffix.
File type category:
Various data file
Text file
Date updated: October 29, 2026
The cof file extension is used by Autodesk AutoCAD-family products for data used in civil engineering calculations. The file is typically stored as readable ASCII text rather than as a binary database.
A cof file can contain one or more sets of engineering data, including TT channel Manning's n values, channel or culvert calculator Manning's n values, runoff curve numbers, Darcy-Weisbach friction factors, culvert diameters, Manning's coefficients, TC sheet-flow Manning's n values, and Hazen-Williams coefficients.
These files are associated with AutoCAD for Microsoft Windows, Autodesk Civil 3D, and AutoCAD for Mac. They support calculation features in the relevant Autodesk software.
Open a cof file with the Autodesk product that created or uses it, such as AutoCAD or Autodesk Civil 3D. AutoCAD for Mac is also associated with this file type.
Because the file is usually ASCII text, a text editor can display its contents, but editing the values outside the Autodesk application may make the file unusable or change calculation results.
There is no general-purpose conversion that turns a cof file into a standard document or drawing format. The file contains calculation data rather than a standalone drawing.
When supported by the relevant Autodesk workflow, use AutoCAD or Autodesk Civil 3D to export or recreate the associated data in another supported format. Otherwise, retain the file as ASCII text and transfer its values through the application's calculation tools.
Software applications that can open cof files:
Software apps that create cof files:
Software applications that handle other tasks involving cof files:
File type category:
Miscellaneous file
Date updated: September 11, 2017
The cof file extension is associated with Atari Jaguar gaming console. File contains common object. It is a Common Object File absolute location executable program file format file. Output from ALN Linker.
It is not possible to open cof extension files manually.
Files with cof extension haven't known conversion.
File type category:
Game file
Date updated: May 18, 2018
The cof file extension is associated with the Diablo II, a hack and slash RPG computer game for Microsoft Windows and Mac, developed by Blizzard.
The cof file stores various game data.
Probably not meant to be accessed by the user.
These games files cannot be converted to anything else. However, sometimes modding.
Software applications that handle other tasks involving cof files:
Microsoft Windows
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