The vast majority of the people who suffer from hair loss frequently inquire, "How many grafts do I require for a hair transplant?" and "Will I require more than one session for a hair transplant?" to find out what they may do to restore the volume of their thinning or receding hair, However, we have observed several misconceptions about the hair transplant surgery, which frequently come to light during the consultation to analyze the hair loss pattern and the demands of our patients, particularly concerning the number of grafts to be harvested and transplanted.

What is a Hair Graft?

A graft is a technical word that refers to a portion of healthy tissue that is taken from the back of your head and transplanted to fix another damaged or weaker area of your body. Hair grafts are tiny scalp tissues made up of a few (1-4) hair follicles that are used in hair transplantation. As a result, you might be wondering how graft surgery works in hair transplants.

Dr Norman Orentriech created the "principle of donor dominance" in 1952, which led to the development of hair transplantation. According to this idea, ‘donor dominance' meant that the balding recipient site would take on the features of follicular unit grafts taken from the donor area's healthy tissues. In other words, when hair follicles are transplanted from the donor location, the balding recipient site will begin to develop healthy hair again. The donor dominance idea is partially debunked since Orentriech proposed that donor follicles take on the features of the donor location, while data from patients demonstrate that the recipient site keeps its original traits.

Now that we've covered everything, you won't need to do any arithmetic to figure out a hair transplant cost per graft estimate because the number of hair follicles contained in hair follicles and follicular density in one graft might vary based on various criteria described below.

Hair Color

Hair colour has been discovered to have an important role in determining follicle density. While redheads have around 90,000 scalp hair follicles, blackheads have approximately 108,000 hair follicles on their heads, which may rise to 140,000 in brown- and blonde-haired persons.


Your hair's typical follicular density will decrease as you get older. At birth, the typical follicle density is around 1135/cm2, but by the third decade of life, it has dropped to 615/cm2.


According to a 2017 study on hair density in various ethnicities, the race has a major influence on hair density, with Caucasians having the highest density and African descents having the lowest.

Individual properties

Individual factors such as the size of your scalp may impact your follicle density because no two persons are alike.

When you consider all of the elements that go into determining hair follicle density, you'll realize that there are no exact solutions to queries like "how many grafts do I need for the crown?" Because the amount of scalp covered by a particular quantity of grafts might vary according to your follicular density. There are, however, techniques to provide an estimated estimate based on hair loss patterns found in male-pattern hair loss patients.

Hamilton-Norwood Scale

The Hamilton-Norwood Scale is a seven-stage categorization system for determining the degree of hair loss in patients with androgenetic alopecia. Dr James Hamilton first developed it in 1951, after observing male-pattern hair loss in over 300 individuals. It was later modified in the 1970s by O'Tar T. Norwood, and it is now known as the Norwood Scale. It's important to remember that the Norwood scale provides an estimate of how many grafts would be required for a hair restoration procedure with appropriate density, but the figures are estimates based on your physiological variations.

After all, the number of grafts available from the donor region is limited. In other words, if you ask yourself, "How many grafts do I need for complete hair coverage?" and look at the scale, you may estimate that 4000-5000 grafts are required for front-to-back full hair coverage, but your surgeon will finally give you the true, physically viable, and necessary amount.

norwood scale
Norwood ScaleNumber of GraftsCrownArea
2500 - 800-
2a1400 - 2200-Centre
31600 - 2400-Front and Temples
3 vertex1800 - 26002000 - 3200Front and Crown
3a2000 - 3000Front And Crown
42200 - 34003400 - 3800Front And Crown
4a2400 - 3600-Front
52600 - 38003800 - 4500Front And Crown
5a2800 - 42004600 - 5600Front And Crown
63000 - 46005000 - 6400Front And Crown
73200 - 50005000 - 6400Front And Crown
Norwood scale

What is the maximum number of hairs that can be retrieved from the donor area?

There are a few crucial aspects that online hair transplant graft calculator programs sometimes overlook. There is a limit to how many grafts may be removed from your donor region. For example, while we may claim that an average patient's donor region can provide 5000-8000 grafts since grafts are removed with 40% - 50% density, most surgeons do not extract grafts extensively. It's simple because some people may not require or have as many grafts as others. As a result, you must talk to your surgeon about how many grafts you'll require.

Finally, we've seen that a larger number of grafts is associated with better outcomes in many patients. This isn't always the case, since the most important thing is that the transplanted follicles survive and blend in with your general appearance. People want to know “how much do 2500 grafts cover?” with a one-size-fits-all approach without consulting a specialist, but it is technically impossible to decide without considering all of these aspects. As a result, we at Sule Hair Transplant Clinic strongly advise you to contact us so that we may discuss your hair loss and give you the best graft transplant plan possible.

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