What are CALC files and how to open them

Are you having problems opening a CALC file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a CALC file?

CALC files have multiple uses, and EasyCalc spreadsheet is one of them. Read more about the others further down the page.

EasyCalc spreadsheet

These CALC files contain the scientific graphs created in EasyCalc, a scientific graphing calculator used on PalmOS devices. It has the features of all the scientific calculators except for the CAS calculator series. You enter the functional expressions, and the program draws the graph for you.

How to open CALC files

Important: Different programs may use files with the CALC file extension for different purposes, so unless you are sure which format your CALC file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested 3 different CALC openers which you will find listed below.

Last updated: March 1, 2021

More file formats using the CALC extension

Through our research of CALC files, we know that the following formats exist. However, we have not yet analyzed them in detail.

  • SFX Advanced Calculator Spreadsheet

Various apps that use files with this extension

These apps are known to open certain types of CALC files. Remember, different programs may use CALC files for different purposes, so you may need to try out a few of them to be able to open your specific file.

CalcTapeCalcTapeUser submitted
SFR CalculatorSFR CalculatorUser submitted
SFR CalcTapeSFR CalcTapeUser submitted

Help us help others helps thousands of users every day, and we would love to hear from you if you have additional information about CALC file formats, example files, or compatible programs. Please use the links below or email us at to discuss further.