| | Conditions Treatments | Hair Loss How much does your hair grow and a day? On average, human hair grows about 0.04 inch or 1 millimeter per day. This works out to roughly 0.5 inches or 1.25 centimeters per month. Hair Loss - Related Articles Rivotril Side Effects How to Stay Motivated on a Diet Blood Clots: Symptoms, Treatment and Prevention? Why Is Mineral Oil Harmful? Am I really thin my BMI said was at the age of 11 and 87 lbs but think so chubby myself am thin? How do you kill MRSA? Information About Accupunture to Quit Smoking