Conditioner to Shampoo Ratio
Compare how fast shampoo and conditioner are used up.
About Conditioner to Shampoo Ratio
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.
Formula
Conditioner to Shampoo Ratio
Washes = product size / amount per wash; compare the two
- per wash
- Amount of each product used per hair wash
Worked example
With the default values below, Conditioner to Shampoo Ratio returns Shampoo Washes of 31. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Shampoo sizeminimum 0.001 ml
- 250 ml
- Shampoo per washminimum 0.001 ml
- 8 ml
- Conditioner sizeminimum 0.001 ml
- 250 ml
- Conditioner per washminimum 0.001 ml
- 6 ml
Results
- Shampoo Washes
- 31
- Conditioner Washes
- 42
- Shampoo:Conditioner
- Conditioner lasts about 1.3x as long as shampoo
Step by step
- 1Values used
- 2Conditioner to Shampoo Ratio
- 3Shampoo Washes= 31
- 4Conditioner Washes= 42
- 5Shampoo:Conditioner= Conditioner lasts about 1.3x as long as shampoo
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Conditioner to Shampoo Ratio calculated?
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.
Why does Conditioner to Shampoo Ratio matter?
People often use more conditioner than shampoo even when bottles match, so the ratio shows which one you actually replace faster.
What values do I need to enter?
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.