How many grafts do I need for my hairline transplant? What's the approximate cost for doing this surgery?

The number of grafts depends on the surface area you wish to cover.  It is safe to transplant 45 grafts per square centimeter.  A higher density may also produce a good yield but sometimes the yield is not as good.  In studies performed, FUE actually produces a better yield than FUT so don't be mistaken by those who recommend FUT over FUE.  The number of grafts you need will depend on where you wish to locate your hairline.  A lower hairline will require more grafts.  I would suggest that you will need 1200 to more than 2000 depending on the location you elect to have for your hairline.  The cost will depend on the method you elect to have performed.  The most expensive method will be a non-shaven FUE procedure.  A partial shave of the donor area will be the next least expensive option for you.  Shaven FUE is not a good idea for you.

For lowering your hairline, it needs 2700-3500 hairs (around 1500-2000 grafts) depending on the position of your mid frontal point. FUT strip surgery is recommeded for non-shave in the donor area.