How to use the hair washing habit log
Enter washes per week, minutes per wash, scalp product uses per week and the number of weeks to tally. The page returns the total washes and total time over that period, the time per week, a four-week monthly figure, and how often you use products as a share of your washes. Enter 0 for products if you use none, and no ratio is calculated in that case.
The conversion basis is one week as 7 days and one month as 4 weeks, which is 28 days. Calendar months run from 28 to 31 days, so converting that way would make the monthly figure move around; the four-week basis keeps it comparable and the result label says so. Current as of October 2026.
No authoritative recommended washing frequency is given, because it depends on your hair and scalp, the products you use and how active you are. The page also does not sort scalp types or pick ingredients for you. It is a logging calculator, not a medical diagnosis. See a dermatologist if itching or flaking persists, if the scalp is inflamed or painful, or if hair loss is leaving scarring.
Frequently asked questions
No. No authoritative recommended washing frequency is given. It depends on your hair and scalp, the products you use and how active you are, so the page simply tallies the frequency you actually keep.
Four weeks, which is 28 days. Calendar months run from 28 to 31 days, so converting by calendar month would make the figure move around; a four-week basis keeps it comparable.
No. This is a logging calculator that adds up counts and minutes; it does not sort scalp types or pick ingredients. Persistent itching, inflammation or hair loss that leaves scarring needs a dermatologist.