Calculation - How to subtract in a form

[defaultqbbmlro21hwl]

I cannot figure out how to subtract one field from another in a fillable form. I'm sure it is something simple that I have missed. Please help!

[try67]

If you want to show the result of field A minus field B in field C enter the following under the Simplified Field Notation option of the Calculate tab of field C:

A - B

[defaultqbbmlro21hwl]

Thanks! I think I have complicated it because what I am subtracing is is the number of hours from time entered. A (HH:MM) - B (HH:MM) = C (Ttl # of Hrs). I'm not able to calculate that at all.

[try67]

That requires a much more complicated script.

Here's a recent discussion of this issue:

https://community.adobe.com/t5/acrobat/js-timesheet-day-total-time-is-reset-to-08-59-hours-total-tim...