how to create a pdf from a form,which will display calculations on the pdf

Unfortunately, widgets are currently not possible to add in the fillable PDF form so if you will create one, you can't see them in the PDF. You will only see the textboxes and the other regular fields.

Here's how to create a PDF form:

http://www.jotform.com/help/212-How-to-Create-a-PDF-Form

Please check this guide for more details about our PDF creator: http://www.jotform.com/help/312-Fillable-PDF-Everything-you-need-to-know-about-JotFrom-fillable-PDF-creator.

Thank you.