HCI file format description

Many people share .hci files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .hci file can be edited, converted or printed with. On this page, we try to provide assistance for handling .hci files.

1 filename extension(s) found in our database.

.hci - HydroCAD IDF Curve

The HCI data files are related to HydroCAD. The HCI file is a HydroCAD IDF Curve. HydroCAD is a Computer Aided Design (CAD) tool used by civil engineers for modeling stormwater runoff.

Data files
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HydroCAD IDF Curve related extensions:
HydroCAD Prefab Chamber
HydroCAD Hydrograph File
HydroCAD Project
HydroCAD Rainfall Curve Data
HydroCAD Units Definition
HydroCAD Unit Hydrograph Definitions

Naturally, other applications may also use the .hci file extension. Even harmful programs can create .hci files. Be especially cautious with .hci files coming from an unknown source!

Can't open a .hci file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .hci file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

bci, chi, ci, gci, hc, hcj, hck, hcl, hco, hcu, hdi, hfi, hi, hic, hvi

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Haskell Interface
Media Control Interface Data
Commodore 64 True Paint Image
Belarc Advisor Report
Mastercam NCI Lines Data
High Resolution Continuous-tone TIFF Image

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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If you have useful information about the .hci file format, then write to us!

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