Hello all, first time here. I am creating a spreadsheet that is end user friendly. I have a form with a list box where a temperature will be entered into a list box,(or combo box) and a thickness will be entered into a list box or combo box and I need the answer to populate back from the sheet to an answer box after the formula runs its macro on the entered numbers. I am good with getting all the data onto the spreadsheet in the proper place from the form, but getting the calculation to work if this value is entered, and then that value is entered, is becoming tricky. Any suggestions?

Sincerely,

learning

Ter