Q14. How much does hair grow per day?

Q&A

Q14. How much does hair grow per day?

A. Hair is said to grow 0.3 to 0.4 mm per day on average. Hair thus grows 12 mm per month and about 14 cm per year. Women’s hair grows faster than men’s. The rate of hair growth is different by age. Additionally, hair grows faster in summer than in winter. Average lifetime of each hair is said to be 3 to 5 years for men and 4 to 6 years for women. Exceptional cases have been reported, however, in which hair continued to grow for 10 years up to 2 m.

Back