* Individual: People have different hair densities naturally.
* Location on the scalp: Hair density is higher in some areas (e.g., crown) than others.
* Hair type: Fine hair has a higher density than coarse hair.
General estimates:
* Average: 80-150 hairs per square inch
* Range: 40-200 hairs per square inch
Note: These are just estimates, and the actual number can vary significantly.