Compare how fast shampoo and conditioner are used up.
Each product's number of washes comes from dividing its size by the amount per wash, letting you compare how quickly they run out. People often use more conditioner than shampoo even when bottles match, so the ratio shows which one you actually replace faster.
Conditioner to Shampoo Ratio
Washes = product size / amount per wash; compare the two
Washes = product size / amount per wash; compare the two Each product's number of washes comes from dividing its size by the amount per wash, letting you compare how quickly they run out.
People often use more conditioner than shampoo even when bottles match, so the ratio shows which one you actually replace faster.
This calculator takes 4 inputs: Shampoo size, Shampoo per wash, Conditioner size, Conditioner per wash. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.