Change Default Calculator

I use a feet and inches calculator in my job as a designer in a 3-D construction program. What I would like to do is find a calculator to substitute into windows default calculator location so that when I press the calculator key on my keyboard the new calculator will open. The IT guys here won't do the research for me so I thought I'd turn to you guys for some guidance. I cannot download or modify my windows 7 machine here at work, but will try to implement suggestions on the W7 machine I have at home, and, if it works, ask the IT guys to implement it here. It seems to me that an .exe file could be put into the request path for the calculator but I don't know that much about the process. Thanks in advance, Phil.

 

The best for Windows 7 are websites:
https://www.easycalculation.com/engineering/civil/feet-inches-calculator.php

https://www.calculatorsoup.com/calculators/construction/feetandinches.php

If you have an iPhone or smartphone you can download a construction calculator app.

https://itunes.apple.com/us/app/construction-calculator/id1092417398?mt=8

https://play.google.com/store/apps/details?id=com.snappyappz.c_calc&hl=en_US

The next option is to purchase a construction calculator.
https://www.lowes.com/pd/Calculated-Industries-Construction-Master-Construction-Calculator/1088107

https://www.homedepot.com/b/Calculator/N-5yc1vZ1z116ih