CAL Converter

Convert CAL files online for free

Select File
Drop or upload your .CAL file

Online File Converter

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How to convert your CAL file

Click the "Select File" button above, and choose your CAL file.
You'll see a preview.
Click the "Convert file to..." button to save your file in the format you want.

Convert CAL to another file type

The converter easily converts your CAL file to various formats - free and online. No Blender or extra software needed.

CAL to J
CAL to AL
CAL to PDF
CAL to OBJ
CAL to FBX
CAL to DAE
CAL to 3DS
CAL to MAX
CAL to BLEND
CAL to MA
CAL to MB
CAL to C4D

Convert a file to CAL

The converter also works in reverse, so you can convert other Raster Image formats to CAL with high quality output.

DWG to CAL
DAE to CAL
X3D to CAL
IGES to CAL
WRL to CAL
JT to CAL
SKP to CAL
3DS to CAL
3DM to CAL
OBJ to CAL
STEP to CAL
FBX to CAL

About CAL files

The .cal extension primarily denotes a CALS Raster Image (Computer-aided Acquisition and Logistic Support), a standard developed by the US Department of Defense for digitizing military technical data. These files are strictly 1-bit monochrome (black and white) bitmaps designed to store architectural blueprints and engineering schematics efficiently. However, their highly specific compression (CCITT Group 4) means they are rarely supported by modern web browsers, standard photo viewers, or mobile operating systems. They lack color support and metadata features found in modern formats like PNG or TIFF.

A secondary, legacy use of the format is for calendar or schedule files created by older software like Microsoft Publisher or Broderbund, which are typically proprietary and locked into discontinued versions. This creates significant access barriers, requiring specific legacy environments just to view the content.

Best Conversion Targets:

For Archiving & Engineering: Convert CALS to TIFF or PDF to preserve the high-resolution line art and scale while ensuring compatibility with modern CAD software like AutoCAD.
For Web & Viewing: Convert to PNG to maintain lossless line quality in a browser-friendly format.
For Documents: If you have a legacy calendar file, converting to PDF is the only reliable way to view the layout without the original software.

Use convert.guru to instantly identify your specific .cal type and convert it to a modern, accessible format.

Use Convert.Guru to open and convert your CAL file.

Users also converted CALS, WEBP, ULP, ZIP, ICAL, BIN, GEO, PDF, ODS, XSD, ICC, ICM and ICS files.

The CAL Converter Story

The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our CAL converter.