Reviewed by

Steven P., FAAD

Board-certified dermatologist

Updated on

Reviewed for accuracy

Table of Contents

Hair Growth Calculator

Estimate your growth timeline based on your habits

Measurement Units

Current Length

in

Your Goal

in

Growth Rate

in/mo

Breakage

Trims

I trim regularly
in
weeks

Start Date (Optional)

Your Results

Visual Growth
Current
Target
12 months

Net growth is zero or negative

  • Try reducing trim frequency or amount
  • Lower your breakage assumptions
  • Select a higher growth rate if applicable
Net Monthly Growth
0.45 in/month (1.14 cm/month)
You're already at or above your target length.

Time to Reach Your Target

~18 months
Range: 15-21 months (65-91 weeks)
Length Projections

Make It More Accurate

  • Breakage depends on hair health, styling, and chemical treatments.
  • Frequent trims keep ends healthy but slow length progress.
  • Track your actual growth for 3 months to find your personal rate.

Educational only. Individual growth varies based on genetics, health, and care routine.

Reviewed by

Steven P., FAAD

Board-certified dermatologist

Updated on

Reviewed for accuracy

Table of Contents