Cool How Long Will My Hair Grow In 3 Months References. Web a hair growth calculator uses a mathematical formula to estimate the rate at which your hair will grow. Your hair generally grows 1/2 inch every month, so if you just trim a little every 3 months or so, your hair will still be growing faster than you.

Web we can estimate that you can grow your hair for about 3 inches or 7.62 centimeters in 6 months. Your hair generally grows 1/2 inch every month, so if you just trim a little every 3 months or so, your hair will still be growing faster than you. Web the scalp hair grows at about 1/3 to 1/2 inch per month on average, so about four to six inches per year for the hair on your head, says vasiloudes.