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

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    Can an error message appear when the sum of 2 entered values is over a set maximum?

    Asked by hughdal on April 19, 2016 at 12:13 PM
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    Answered by Ben on April 19, 2016 at 01:25 PM

    Yes, that would be possible to do.

    To do it, you would simply need to add:

    1 form calculation to your form that will do the sum of the two fields

    1 condition that will check if that value is under the maximum.

    The following guides will help you see how to do the calculations:

    How to Assign Calculation Value

    How to perform calculation in the form?

    And the following with the condition:

    How to show or hide a field in the form based on the other field input or selection

    Of course, if you happen to have any issues setting it up, just let us know.