What is the Norwood Scale?

The Hamilton-Norwood Scale, better known simply as the Norwood Scale, is a way of measuring and categorizing male pattern baldness using an illustrated representation of the progression of hair loss in men. The scale ranges from stages I to VII. A hair restoration doctor or clinician will refer to a patient as, for example, a “Norwood 3.”

The measurement scale was first conceived by Dr. James Hamilton in the 1950s. It was later revised and updated by Dr. O’Tar Norwood in the 1970s. It is widely used among hair restoration professionals throughout the USA, Canada and the UK.

It is quite useful in its simplicity, such that a layperson is generally able to determine that his hair loss was at, say, a 3A two years ago, but has progressed nearer to a 3V recently.

If you would like to know exactly where you are on the scale, contact Dr. Brandon Ross for a no cost consultation.

A similar chart exists for female pattern baldness, known as the Ludwig Scale.

About Brandon Ross MD