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.
How to add formula for calculation within form?Asked by jlmiller2 on September 05, 2013 at 01:04 PM
For example, I am creating a nutrition log - capturing calories consumed, calories burned. Would like to add an auto fill whereas the total is automatically calculated.
Calculation feature is not available in JotForm, however it's still possible to do the calculation by adding custom code in your form. To do this you will have to download your form's full source code and then add the custom code.
Here is a guide to help you download your form's source code: http://www.jotform.com/help/104-How-to-get-your-Form-Source-Code
Do let me know and I can create a demo form for you.