What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.

At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.

We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.

  • Profile Image

    Custom Calculations to Paypal integration

    Asked by dorsetholidaylets on May 15, 2014 at 08:45 PM

    Hi this is a great step in the right direction, the only small point is it would be better to be able to use the result from the calculation in the Paypal amount. It appears that you have to caculate the amount first and show this and then show the amount again in the PayPal field to submit to PayPal. 

    It would also be great to be able to add posateg costs in the same way as you can for sellig products.


    Best regards David.

  • Profile Image
    JotForm Support

    Answered by jonathan on May 15, 2014 at 08:56 PM

    Hi David,

    Currently, you can only do the custom calculations if you use the Calculation widget.

    So, it is really necessary to use it.

    The Paypal Custom Payment integration do NOT have any built-in calculation function, so you cannot use it to do the calculations.

    To be more effective, you can also just hide the Calculation field result like this 


    If you test my Custom Paypal Calculation form here http://www.jotform.me/form/41276627819464

    you will noticed that as if the Paypal custom amount itself is the one calculating the amount.


    Hope this help. Inform us if you need further assistance.