Calculations on Form

I have tried but cannot get this to work.

Is there a way to get calculations to show up live on a form?

I have a mileage app. I put in the beginning and ending mileage.

I would like for the computed trip to show up ‘live’ while I am entering the numbers.

Is this possible?

No, because the math columns require data to be written to the sheet first. Since you are in a form button, nothing has been written to the sheet yet. You would probably have to enter this into on a detail view screen first, get your calculation, then click on the form button to bring in the calculated values. I don’t know of a better way to do this.