how much does hair grow on average in one month?
How Fast Does Hair Grow? Q: How fast does hair grow? A: The speed of hair growth is roughly 1.25 centimeters or 0.5 inches per month, being about 15 centimeters or 6 inches per year. With age the speed of hairgrowth might slow down to as little as 0.25 cm or 0.1 inch a month. Cell division is responsible for the hair growth cycle. The new cells push the hair forward to make it longer, so the new hair is added at the root. There are about 100.000 hairs on a healthy scalp of hair. Each of these hairs will, in normal healthy conditions, last for one up to six years. People loose about 100 hairs per day, in normal conditions.