Create energy savings calculator module for WordPress

I would like to create a wordpress module that I can duplicate on multiple websites. The module would be a SEER calculator to compare the SEER rating of a prospective customers current Air Conditioning system against the SEER rating of a newer system and showing the price savings. This is for the AC industry. You can see examples of similar calculators here:
https://www.seerenergysavings.com/
https://www.martinsheatandair.com/seer-calculator/

Also, you should be able to lift the calculations from this gov't provided spreadsheet.
https://www.energystar.gov/sites/default/files/asset/document/ASHP_Sav_Calc.xls

No need for all the data on the spreadsheet. Such as heat pumps, not interested in heat pumps at this time. Also, keeping the module as neat/clean and user friendly as possible while also making it look cool. (such as website examples above.)

I would like this calculator created in such a way that it can easily be inserted into my website and/or any future websites should I decide to make it available to others.