The short answer

There is no universal answer, and any number quoted to you without a proper assessment should be treated with caution. That said, most procedures fall within a fairly narrow band: according to the International Society of Hair Restoration Surgery's 2025 practice census, the average first-time procedure required around 2,300 grafts, and roughly four in five cases fall somewhere between 1,000 and 4,000. Where you sit within that range depends on how much area needs covering, how dense you want it to look, the characteristics of your hair, and — critically — how much donor hair you have available to spend.

What determines the number

Four things drive the count, and they interact.

The first is the area to be covered. This is the most obvious factor: restoring a receding hairline requires far fewer grafts than covering a hairline, mid-scalp and crown all together. Graft counts scale with surface area, which is why the number climbs steeply as hair loss becomes more extensive.

The second is the density you are aiming for. Grafts are placed at a certain number per square centimetre, and the higher that figure, the more grafts the same area consumes. This is a judgement rather than a maximisation exercise: density beyond what the blood supply and donor reserve can sustainably support brings real risks, and a well-planned procedure at moderate density can look better than an aggressive one.

The third is your hair itself. Thicker, coarser hair provides more visual coverage per graft than fine hair, so two people with identical hair loss can need meaningfully different counts. Curl helps too, as wavy or curly hair creates more apparent volume. And contrast matters — dark hair against pale skin shows the scalp more readily than a lower-contrast combination, so it generally needs greater density to look full.

The fourth is your donor supply — which is not really a factor in what you need, but a hard limit on what you can have. We return to this below, because it is the one that most often gets overlooked.

Indicative ranges by pattern

The following are broad bands rather than prescriptions, and the variation within each is substantial. Where your own case sits depends on the factors above at least as much as on your stage of loss. Both the Norwood scale for men and the Ludwig scale for women are defined in more detail in our glossary.

For early pattern loss in men — around Norwood 2 to 3, where recession is confined largely to the hairline and temples — procedures commonly fall somewhere in the region of 1,000 to 2,500 grafts.

For moderate loss — around Norwood 4 to 5, where the mid-scalp and crown are involved — the range broadly runs from about 2,000 to 4,500.

For advanced loss — Norwood 6 to 7, where only a horseshoe of hair remains — full restoration would call for considerably more, often quoted at 4,000 to 7,000 or beyond. In practice these cases are relatively uncommon in a single session: the same census data indicates that only around two per cent of procedures exceed 4,000 grafts, which reflects both surgical limits and donor reality. Cases at this end are typically staged across more than one procedure, and the honest goal is usually strategic coverage rather than restoring the density of youth.

For women, reliable graft ranges by Ludwig stage are harder to give, and it is more useful to say so than to invent them. Female candidacy depends far more on whether the donor area is stable and unaffected than on the stage of thinning itself — and because female pattern loss is often diffuse, the donor area is not always secure. As a broad guide: women at Ludwig I are generally not surgical candidates, or at most may consider very targeted work; Ludwig II may be appropriate for surgery in carefully selected cases with a stable donor area; Ludwig III has the greatest potential need but also the most stringent candidacy requirements, and even at this stage the majority of women may not be suitable candidates. However, stage alone is rarely the deciding factor. This is covered in more detail in our page on hair transplants for women.

Why estimates differ between clinics

It is common to receive materially different graft estimates from different clinics for the same head, and the reasons are worth understanding.

Some of the variation is legitimate. Surgeons differ in their philosophy on density, on how conservatively to harvest, and on how much to plan for future loss — and two thoughtful plans can land on different numbers.

Some of it is not. Under per-graft pricing, a higher count means higher revenue, which creates an obvious incentive. Graft counts are also difficult for a patient to verify independently, which is why an unusually high estimate — particularly one produced quickly, without a thorough assessment — deserves scrutiny rather than acceptance. An unusually low one merits the same question, since it may reflect a plan that will not achieve what you are hoping for. In both directions, the useful response is the same: ask what the number is based on. A surgeon who has assessed you properly can explain their reasoning. Our guide to choosing a clinic covers this and the other questions worth asking.

The constraint most people miss

Here is the part that changes how the question should be asked. Your donor area is finite, and it is smaller than most people assume: the total harvestable supply across a lifetime averages somewhere in the region of 4,000 to 6,000 grafts, and safe extraction in a single session is usually limited to two or three thousand to avoid visibly thinning the donor zone.

Set the average first procedure of around 2,300 grafts against a lifetime supply of 4,000 to 6,000, and the implication is stark: a first transplant may consume somewhere between a third and a half of everything you will ever have. Grafts spent now are not available later — and pattern hair loss generally continues after surgery, meaning later is when you may need them.

This is why "how many do I need?" is only half the question. The other half is "how many can I afford to spend, given where my hair loss is likely to go?" A plan that satisfies the first while ignoring the second is not a plan.

What to do next

A specific graft count is a surgeon's judgement, made in person, with your scalp in front of them. What can be established beforehand is the question that sits underneath it: whether your hair loss and donor supply put you in a position where a transplant is realistic, and whether this is the right moment to spend from a finite resource.

That is what a FOLiQA assessment is designed to help with. You complete a detailed intake about your hair loss and your goals, and we give you an honest, independent verdict on your candidacy — yes, no, or not yet — with the reasoning explained, so that when a clinic does quote you a number, you can weigh it against a clear understanding of your own situation. We are paid by you, not by clinics, so the assessment's only job is to get your decision right.

The cost is €59. Set against a procedure that runs into the thousands and draws permanently on a supply you cannot replace, that is a small amount to spend on knowing where you stand.

This guide is general information, not medical advice. Read our full disclaimer.