Total the monthly cost of multiple hair care products.
Each hair care product contributes its price spread over the months it lasts, and the sum is the routine's monthly and annual cost. Multiple products each one only partly used make for a creeping budget, so normalizing them to a month reveals the total.
Hair Care Products Monthly
Monthly cost = shampoo price / months + conditioner price / months + styling / months
Monthly cost = shampoo price / months + conditioner price / months + styling / months Each hair care product contributes its price spread over the months it lasts, and the sum is the routine's monthly and annual cost.
Multiple products each one only partly used make for a creeping budget, so normalizing them to a month reveals the total.
This calculator takes 6 inputs: Shampoo price, Shampoo lasts (months), Conditioner price, Conditioner lasts (months), Styling product price, Styling product lasts (months). The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.