How much time will it take for my hair to grow past my shoulder?

Hair growth.: As a general rule hair grows around 0.3 to 0.4 mm/day. This is about 6 inches per year. A persons overall health, nutrition, diet, activities, medications, and social activities can affect the hair quality and hair growth. Due to the growth cycle of hair a recent serious illness can cause hair problems two or three months after the event.