Norwood scale: how many grafts do you need?

What is the Norwood scale?

The Norwood scale (more precisely: Hamilton-Norwood scale) is the internationally used classification of hereditary hair loss in men. It describes 7 stages, from slight receding at the temples (Norwood 2) to the remaining horseshoe of hair (Norwood 7). For hair surgery it is the shared planning language: the stage defines the area to cover, and from that follows the graft requirement.

Which Norwood stage am I at?

As a quick guide: Norwood 2 shows receding temples with a stable front, Norwood 3 a clearly receding hairline, and the 3 vertex variant additionally a thinning crown. Norwood 4 and 5 increasingly connect front and crown, at 6 both zones merge, at 7 the horseshoe remains. In-between forms are common; we determine the exact stage at the analysis from photos and measurement.

How many grafts do I need per Norwood stage?

Every row applies “depending on hair calibre, contrast and target area”: the ranges are planning figures, not offers.

Why ranges instead of exact numbers?

Because two patients at the same stage need different amounts. Strong, wavy hair covers more with 2,500 grafts than fine, straight hair does with 3,500. The contrast between hair colour and scalp, the desired density and the shape of the new hairline also change the requirement. A serious number therefore only exists after measurement, in writing and with reasoning; everything else is a sales figure.

What limits the maximum graft number?

The donor area, not the wish. Over a lifetime, the horseshoe supplies only a finite number of extractable grafts, and what has been taken does not grow back there. Per session, the safe upper limit is around 4,500 grafts with the FUE Sapphire method. A provider promising maximum numbers from a tight reserve is not planning but selling; the result shows years later as a thinned-out donor area.

Is one session enough or do I need two?

Up to about Norwood 4, one session is usually enough. From Norwood 5 it depends on donor capacity and the target picture: often the front is built first, because it frames the face, and the crown follows in a second session if the reserve allows. We discuss this order openly before the first treatment, so you know the whole path, not just the first step.

How do I get a reliable assessment?

By measuring instead of guessing: at the free hair analysis you send photos and receive a personal assessment with stage and graft range within 24 hours; the plan becomes binding after the examination in Frankfurt, as a fixed price without a graft counter. For the timeline after the procedure, see our guide on hair growth after a transplant.