Hair Growth Calculator
Estimate hair growth over time, find how long a target growth will take, or project your final length — with live updates and unit syncing.
📈 Growth length (given time)
⏳ Time required (given growth)
💇 Current & final length
Quick summary
Enter values above to see your summary.
Avg rate: 0.5 in/month ≈ 1.27 cm/month
Step-by-step derivation
1) Average growth rate r ≈ 0.5 in/month = 1.27 cm/month = 12.7 mm/month.
2) Convert your time t to months (1 month ≈ 30.44 days ≈ 4.348 weeks; 1 year = 12 months).
3) Growth length: L = r × t.
4) Final length (with current length C): F = C + L.
Reference table (average growth)
| Period | cm | inches |
|---|
Sources
- Average monthly growth ≈ 1–1.27 cm (≈0.5 in): dermatology references and reviews.
- Examples: articles explaining typical growth ranges and cycles.