(now) + XY weeks

I'm wondering whether this is the right module for me. I'm no good with php and since every usage with this module seems really specialized I figured I would just be annoying and ask.

Users will be entering a number (say 5) for the number of weeks into a cck field. From whatever number they entered I wanna display a date - "now" (time/day of viewing the node) plus THAT NUMBER of weeks. The reason is that we want users to know if they ordered today, when will they get their orders by.

I don't necessarily need help in finding the exact code to do this (unless you have a solution ready), I just need to know if this is the right module for this job.

Thanks!
Anja