The general consensus among hair care experts is that most people should get a haircut every 6 to 8 weeks to maintain healthy hair and keep their style looking fresh. However, this interval can vary depending on hair length, texture, and condition:

• For short hair, haircuts are typically needed every 2 to 4 weeks to maintain a tidy appearance.
• Medium-length hair usually requires trims every 4 to 6 weeks.
• Long hair, especially if growing out, should be trimmed approximately every 6 to 8 weeks to prevent split ends and maintain health.
• People with damaged hair (due to heat styling, dyeing, or chemical treatments) should consider more frequent trims every 6 weeks or so to control breakage.
• Curly and coily hair types may need less frequent cuts based on preference, but regular trims still help with dryness and damage.

Regular trims do not speed up hair growth but help avoid split ends and promote the overall health and manageability of hair.

Thus, the haircut frequency should be tailored to individual hair type, style goals, and hair health, but the common recommendation is about every 6 to 8 weeks for most people.