Is there a way to pre-populate a date field to be 2 weeks from the current date?

I am wondering if it is possible for there to be a date field on a form that is pre-populated to be 2 weeks ahead of the day that they are filling it out. 

It is for an expected completion date of work. 

That's possible with the DateTime field.

Just add it to your form then able Default Date. Select Custom and enter today+14. This means that the current date will be added 14 days (2 weeks). So when you preview your form, the datetime field will be automatically prepopulated with the date 2 weeks ahead of the current date.

Hope this helps!