I am interested in create a fillable PDF, for which I found This question which tells to use hyperref. But I am curious that if I have 2 number fields, A and B, and I want a third field to be a number field, but not where you write, but where it gives the result A+B. How would I go about doing it?

1 Answer 1


You can do this by using the calculate-option for a textbox in hyperref, which requires a JavaScript code. There is a solution in the following question, where there's also a discussion on a problem that can occur and its solution.

pdftex and javascript forms with automatic calculations

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