Quantitee of hair on the scalp
100 000 to 170 000 - The amount of natural hair depending of ethnic group and the type of hair.
0.04 mm to 0.1 mm - the thickness of a human hair or diameter. Therefore, there are 10 to 25 hair for a diameter of 1 mm.
200-300 - The number of hairs per cm²
600 cm ² to 800 cm ² - The mean area occupied by the scalp.
3 m² to m² 4 - The surface area occupied by hair of 10 cm. This area of hair must be washed.
Hair follicles1000 - The number of hair follicles per cm² that has a newborn.
500 - The number of hair follicles per cm² that has an adult aged 25 to 55 years
5-200 - The number of hair that can grow in a single hair follicle during the life of a human.