How many grafts will be required to cover this whole scar? Planning for FUE. (photos)

Hair transplant surgery does not cover the old hair transplant scar as you may think.  You will still see the scar if you keep your hair very short.  You need to understand what is possible and have realistic expectations.

I advise you to have a FUE operation of 1000-1200 grafts. Hair transplantation would cover all bald scar in one session of operation and you would have a good, successfull result

around 700 to 800 grafts are required to cover this scar area...
As donor is precious and one should Alsace it for future hair loss so it's recomended to try scalp micropigmentation for scars..it's amazing if it's done by some expert....do Check it out 

Without seeing you in person and measuring out the area it's hard to say, I'd guess a few hundred at the least.  You may also want to consider scalp micropigmentation as an option.

Thank you for your question,  if we do a Hair transplant in this area the entire scar may not be hidden because we can not achieve the density which is there naturally . so when your hair are really sort there is a definite possibility that the scar will be visible, however the visibility will be much lesser as compared to the current condition. and if you keep you hair longer the scar will not be visible. you may think of combining micro pigmentation along with hair transplant to achieve better results or you can go in for a scar revision, it is to basically reduce the width of the scar followed by a hair transplant. if you go for a hair transplant you need to consider the trycophytic closure to allow hair grow from the scar itself.

That is an unfortunate situation. I personally prefer scar revision by excision under microscopy but only a few perform that procedure. Grafts placed into scar tissue may not survive because of lack of blood supply in the scar.

It is a waste to use FUE to cover the scar as your hair has better purposes to address balding. Consider scalp micropigmentation for the scar