Is it possible to position the fields of my form in a two columns layout?

My form is really long. I need my form to be laid out into two columns with calculation ability. http://www.timelesswoodwrk.com/builders/

I suggest you to check the following guide: https://www.jotform.com/help/328-How-to-Position-Fields-in-JotForm as it will help you to see how to position the fields in your form.

Once you've shrunk your fields you can use the form designer to create the 2-columns layout you want to use.

For the calculation ability you can refer to the following guide: https://www.jotform.com/help/259-How-to-perform-calculation-in-the-form

Let us know if you need further assistance.