Ignoring these perceptual differences, human hair grows at a fairly consistent rate of about half a millimeter per day, or about half an inch each month (more specifically, the study says hair grows at 0.44 mm per day). Depending on your age, hair may grow faster or slower.
How much new hair growth is normal?
The American Academy of Dermatology says that hair grows about 1/2 inch per month on average. Thats a grand total of about 6 inches per year for the hair on your head.
How quickly does new hair grow?
The hair on your head grows about a half inch per month, or 6 inches per year. In general, male hair grows slightly faster than female hair. After a bad haircut, you can expect your hair to grow back at about this rate.
Does hair grow every day?
Ignoring these perceptual differences, human hair seems to grow at a pretty consistent rate of about half a millimeter or so per day, or about half an inch every month (this study quotes a specific rate of 0.44 mm per day).