>> CALS file

CALS file format description

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

1 filename extension(s) found in our database.

.cal - CALS Compressed Bitmap

The CAL graphic files are related to FMJ Soft Image Eye. The CAL file is a CALS Compressed Bitmap. The CALS bitmap format was developed in the mid-1980s to standardize on graphics data interchange for electronic publishing for the federal government.

FMJ Soft Image Eye
Graphic files
- / -
cals, gp4, mil
CALS Compressed Bitmap related extensions:
Rayshade Image
Lego Mindstorms EV3 Robot Graphics File
ArtRage Painting Image
Arbortext Advanced Print Publisher Raster Image
Hires Manager Bitmap Image
ArcInfo Band Sequential Image

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

Can't open a .cals 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 .cals file extension is often given incorrectly!

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

als, cal, calx, caos, caps, cas, clas, cls

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Keysight PLTS Calibration Data
Comma-Delimited ASCII Text
Java Class Data
ArcInfo Geocoding Classification Data
HTML Calendar Maker Pro Calendar Data
CALS Compressed Bitmap

Operating systems currently supports the following operating systems:

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

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