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.
I am currently checking your form. I will be back as soon as I find a fix.
I think the calculations do not work because the fields are hidden initially. A workaround would be be can be done by following the steps below:
1. Replace your calculation widgets with Number fields.
2. You have to setup conditions such that calculations are only performed when an option in In/Cm is selected.
The result should be as follows.
Let us know if you need further assistance.