Hair Growth Calculator
Time to Desired Length
Calculate how long it will take to grow your hair to a target length
inches
inches
Growth in Time Period
Calculate how much hair will grow in a given time period
months
Formula
Time (months) = (Desired Length − Current Length) / Monthly Growth Rate | Average growth ≈ 0.5 inches/month (1.25 cm/month)
Frequently Asked Questions
How fast does hair grow on average?
Hair grows about 0.5 inches (1.25 cm) per month on average, which is approximately 6 inches (15 cm) per year. Growth rate varies by genetics, age, health, and nutrition.
Does cutting hair make it grow faster?
No, cutting hair does not make it grow faster. Hair growth occurs at the follicle beneath the scalp. Regular trims help prevent split ends and breakage, which can make hair appear to grow faster by reducing length lost to damage.
What factors affect hair growth rate?
Key factors include genetics, age (growth slows with age), nutrition (protein, iron, biotin), hormones, stress levels, and overall health. Hair also grows slightly faster in summer than winter.