If you copy calculator code for you site directly from our website at https://www.calculatorpro.com you can add default values to inputs.
For instance, the code for the Commission Calculator is:
<div class="cp-calc-widget" data-calcid="1470" data-anchor="6" data-hash="6077"></div><a href="https://www.calculatorpro.com/calculator/commission-calculator/">Online Calculator</a><script src="//www.calculatorpro.com/wp-content/plugins/calcs/js/widgetV4.min.js"></script>
You can then add a comma delimited string for default values. Leave a section blank to have no default values.
data-defaultvalues=",5"
So the code will appear as:
<div class="cp-calc-widget" data-calcid="1470" data-anchor="6" data-defaultvalues=",5" data-hash="6077"></div><a href="https://www.calculatorpro.com/calculator/commission-calculator/">Online Calculator</a><script src="//www.calculatorpro.com/wp-content/plugins/calcs/js/widgetV4.min.js"></script>
Then the calculator will load with the default value pre-injected. See the screenshot (the 5 was loaded automatically). https://screencast.com/t/gyecd84Xr6v