Estimate how long a hair mask jar lasts and its monthly cost.
Hair masks are used in generous amounts but only a few times a week, so monthly consumption determines how often you rebuy. Deep treatments are an occasional but sizable purchase, and converting them to a monthly cost stabilizes the beauty budget.
Hair Mask Monthly Cost
Months per jar = weight / (grams per use x uses per week x 4.35)
Months per jar = weight / (grams per use x uses per week x 4.35) Hair masks are used in generous amounts but only a few times a week, so monthly consumption determines how often you rebuy.
Deep treatments are an occasional but sizable purchase, and converting them to a monthly cost stabilizes the beauty budget.
This calculator takes 4 inputs: Mask price, Mask weight, Grams per use, Uses per week. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.