How is the graft count decided in a hair transplant?

What is a graft, and how does it differ from a hair?

A graft is a follicular unit taken from the scalp in one piece. A single graft can contain 1, 2, 3 or even 4 hairs. So 3,000 grafts does not mean 3,000 hairs; at an average of 2.2 hairs per graft, 3,000 grafts is roughly 6,600 hairs.

Some clinics deliberately talk in hair counts, because the figure looks bigger. We recommend always comparing quotes on grafts.

• Single-hair grafts are used in the front row of the hairline; they determine naturalness.
• Two- and three-hair grafts create density behind that.
• If the graft distribution is never reported, the naturalness of the result has been left to chance.

Donor capacity: the value that sets the real limit

Hair at the back of the head and above the ears is resistant to androgenetic alopecia, which is why it is used as the donor area. But it is a limited resource and it is not replenished over a lifetime.

At examination, donor density (follicular units per cm²), hair calibre, hair-to-skin colour contrast and curl are measured. From a dense donor with thick hair, 4,500 grafts can be taken safely; from a sparse donor with fine hair the number may stop at 2,500.

A good plan covers today's loss while leaving a reserve for the loss that may progress over the next ten years.

Area calculation and the Norwood scale

The area of loss is measured in cm² and multiplied by the target density. In the front, 40–45 grafts/cm² is generally planned, and 30–35 grafts/cm² at the crown. Given that natural hair density is 80–100 follicles/cm², the aim of a hair transplant is not to reproduce the old density exactly but to restore visual fullness.

For a Norwood 3 patient, 2,000–2,800 grafts may be enough; in Norwood 5–6 cases, 4,000–5,000 grafts and sometimes two sessions come into play.

Be wary of exaggerated graft promises

A promise of 6,000–7,000 grafts in one session is not physiologically possible for most donor areas. Over-harvesting leaves permanent thinning in the donor area and cannot be reversed.

In addition, whether each harvested graft takes depends on how briefly it stays outside the body. The larger the number, the longer the procedure and the lower graft viability. A sustainable number is therefore always better than a large one.

What a transparent graft quote contains

The quote shared after our remote assessment sets out the graft range, the planned technique, an estimate of graft distribution, the length of the procedure, the services included and the 12-month follow-up programme. The graft count established on the day is recorded in writing in your file.