How to insert a calculate field in the form?

[Kal_Lam]

@djosed, maybe you could do it as outlined in the post discussed previously:

Calculating area using geoshape question type

If you wish to calculate an area using the geoshape question type, try designing your xlsform as follows: In the survey tab of your xlsform: [image] Reference xlsform: Area Calculation.xls (26 KB)