The Norwood-Hamilton Classification Explained
Male Androgenetic Alopecia (male pattern hair loss) progresses in predictable anatomical patterns driven by dihydrotestosterone (DHT) sensitivity. The Norwood-Hamilton Scale is the universal diagnostic staging framework used by hair transplant surgeons to evaluate hair loss extent and plan surgical restorations.
Graft Estimation by Norwood Stage
| Norwood Stage | Hair Loss Pattern | Estimated Graft Requirement |
|---|---|---|
| Norwood 2 | Mild temporal recession; mature adult hairline | 1,200 – 1,800 Grafts |
| Norwood 3 | Deep symmetrical temporal recession; classic M-shape | 2,000 – 2,500 Grafts |
| Norwood 3 Vertex | Temporal recession with concurrent crown thinning | 2,500 – 3,200 Grafts |
| Norwood 4 | Severe frontal recession with expanding crown spot | 3,200 – 3,800 Grafts |
| Norwood 5 | Narrow bridge between frontal and crown bald areas | 4,000 – 4,800 Grafts (Megasession) |
| Norwood 6 & 7 | Extensive baldness; only horseshoe donor band remains | 5,000+ Grafts (2 Sessions / Beard Grafts) |
Use our online Hair Graft Calculator to compute your specific graft count.
Hair Graft & Surgical Candidacy Evaluator
Calculate estimated follicular unit requirements and evaluate your suitability based on validated Norwood-Hamilton clinical parameters.
Current Selection: Norwood 3: Deep Frontal Recession — Frontal recession creating pronounced M-shape pattern; requires hairline redesign.
Age helps assess stability of native donor hair and future miniaturization velocity.
Determines whether medical stabilization is recommended prior to surgery.
Safe extraction limits depend on donor follicular unit density and hair caliber.
Favorable Surgical Candidacy
Stable hair loss pattern with healthy donor density. FUE or DHI sapphire direct implantation is suitable for dense, natural restoration.
Want an exact hairline design and donor microscopic assessment?
Get an in-person or high-resolution photo consultation with Dr. Prem Sunder & trichology team.
*Medical Disclaimer: Follicular unit calculations and candidacy indicators are educational projections based on standardized clinical averages. Individual scalp elasticity, hair caliber, and miniaturization dynamics require formal microscopic trichoscopy and physician evaluation. In compliance with National Medical Commission (NMC) regulations, results may vary by individual physiological response.
FUE Hair Transplant
Explore detailed procedure insights, before/after results, surgeon credentials, and pricing at Cosmo Radiance.
Have questions about this procedure?
Speak directly with our senior surgeons and medical team at Cosmo Radiance Hyderabad for confidential clinical guidance.