Is my donor area sufficient? (Photos)

Photos cannot determine if you would be a good candidate for surgery.  You need an examination and the doctor needs to understand your goals and expectations.

From what I can see in the pictures, it appears you have a sufficient donor area. There are many factors that go into a successful hair transplant - donor density being just one of them. If in fact your scalp donor density is not sufficient enough to get your hair to where you want it to be, there are other innovative options available such as body hair transplantation, which involves extracting follicles from the beard, chest, or other viable areas. As far as the number of grafts needed, we'd need better pictures to accurately answer this. Number of grafts needed versus number of grafts that can be extracted often differ. Most FUE transplants are capable of yielding anywhere from 500-3,500 grafts. These numbers will vary a great deal based on the patient, the hair, and the goal result. With the areas you're wanting to fill in and the results you're looking to get, you will likely need on the high end of this number. The reason we stop around 2500 grafts with FUE is to avoid risks associated with mega-sessions. Many surgeons (especially those abroad and/or inexperienced) will tell you 'the more the better.' This is not always true and can cause irreversible damage such as shock hair loss, increased scarring, and a 'worse-off than before' look. Make sure that you thoroughly research your prospective hair transplant surgeon. Not all are created equal. 

Thanks for submitting your photos. Based on them your donor side does not look very strong but in between 3000-3500 grafts with FUE method surgery can be transplanted and it will cover around 70 % of your balding area. A second surgery will be needed after a year if your donor is suitable.

Your scalp donor region is sufficient enough to have a frontal and mid scalp hair restoration, and you could have a 2nd procedure for the crown using an additional 1,000 grafts from your scalp donor region in combination with body and beard hair if the quality is good. 

From the photos provided, your donor hair looks quite dense. You appear to be a good candidate for hair restoration using the FUE technique, although I would recommend only going to a clinic that has the doctor doing the extractions, not technicians. Your donor is limited and many clinics are now using technicians to harvest the grafts, which is against ISHRS standards, and can lead to less higher transection rates and increased scarring in the donor site, read the link below, good luck,
Dr. Robert Jones

The donor area looks like it has good density and quality of hair. The pictures would suggest that you are a good candidate for an FUE hair transplant. It may be wise to do your hair transplants in stages though to make sure that you have a great success rate. I would limit your procedures to 200-2500 grafts per session and maybe go for 2 sessions. Focus on frontal hairline with 1st stage and then add hairs where desired at the 2nd stage. 

What I would want to know is your hair character, its thickness and your donor density, all three are determined at an examination.  Once I have that, I can determine what it would take to perform a hair transplant in terms of using up your donor supply which is limited. Your pattern of hair loss is a 'high' Class 6 pattern which means to me that the sides may come down as you age.  It would be all part of my Master Plan to be able to work with you for the years to come as hair loss is progressive and you might not have yet seen where your hair loss will take you. You should not do a hair transplant until you are at least 25 years old.