How many FUE grafts per cm needed for dense hairline?

The perception of "dense" hairline is very subjective and it depends on your hair color, skin color, how you style your hair, etc.  In general, an average hair density is 200 hairs in a square centimeter.  One hair transplant surgery cannot achieve this.  Some people can be happy with just 25 to 50 hairs in a square centimeter while others may not be happy until they achieve 100 to 200 hairs.  It all depends on your realistic goals and expectations. 

Thanks for the question. Based on your photos, the 2000-2500 grafts might be good option for you, but it would be wrong to say something for sure. You should see a board certified surgeon. You can then plan the process together and discuss the results. I wish you all the best. 

Great question. To have a really nice dense hairline moved down an inch I would expect no less than 5-600 grafts of 1's, 2's and some 3's.

Hair density is only one factor in planning.  The range of grafts per square cm is from 20 grafts to 70 grafts per square cm.  Normal hair density varies and ranges from 45 to 120 follicular units per sq cm.  The artistic planning of hair restoration is in how to achieve less with more!!  Surgical planning includes where to put more density of hair grafts, graft angulation, caliber of hair, and pattern of hair.  One issue of overly packing grafts is the graft survival rate may decrease due to so many grafts competing for limited blood supply.  The quality of the hair graft and supporting it with regenerative factors has been another key change in hair over the last several years.  Best Dr. Anil Shah

20-35 grafts per cm is usually best, depending on the color, curl, shaft diameter, hair density behind the hairline and density in the donor area. Also, an estimate of your likely genetic propensity for future hair loss must be factored in - not to mention your budget for possible future hair restoration if necessary.

Hair transplant can be an option for forehead reduction,  correcting  receding hair line and asymmetry on your frontal hair line/forelock.I advice you have a FUE; you would get the desired hairline in just one session of dense packing hair transplant. Density of hair transplanted area would be % 50 of native hairs at the end of 1 year with a dense packing work. Approximatelly 35-40 greft for each centimeter square can be transplanted to bare area. 

It would be interesting to see how large a surface area you require for your hairline to be brought forward. Like previous answers, the density per cm2 ranges between 20-70 grafts but the number implanted will vary according to your donor supply, your skin colour and the management of your future hair loss. 

I don't think that the density question by itself makes sense as the size of the balding area dictates the planning and density is only one of the considerations. Your donor density relates to the size of your balding area so a skilled doctor needs to plan the reconstruction of these parameters as well as other factors such as hair thickness, the waviness of your hair and the color contrast between your hair color and your skin color.