Identify the same version
Check the full name, designation and reference. Bottles sharing a main name may contain different versions. Record volume and dated total price, including delivery when it affects the decision.
Use a common basis
Divide price by volume and multiply by 100 for euros per 100 ml. Illustrative example: €45 for 30 ml is €150/100 ml; €90 for 100 ml is €90/100 ml. These figures do not describe real offers.
Separate saving and commitment
The example’s larger bottle costs less per volume but requires €45 more upfront. That only helps if you want the quantity. A sample can help evaluate a version; it does not guarantee a number of wears because sprays and application vary.
Decide with uncertainties visible
Record missing experience: skin trial, preference across occasions or storage space. Check whether a small bottle is sold and at what price. Do not turn a personal estimate into a general longevity claim. Balance immediate budget, experience and plausible use.
Compare gift sets without misleading totals
For gift sets, separate fragrance volume from shower gel, lotion or another-version miniature. Do not divide by all volumes as if they were the same perfume. Identify useful contents before comparing with one bottle.
| Size | Equal-volume price | Upfront budget |
|---|---|---|
| 30 ml for €45 | 45 / 30 × 100 = €150/100 ml | €45 upfront |
| 100 ml for €90 | 90 / 100 × 100 = €90/100 ml | €90 upfront |
| Difference | €60/100 ml less for the larger size | €45 more upfront |
Your checklist
- Compare the exact version
- Calculate equal volume
- Consider likely use
Frequently asked questions
Is the lowest price per ml always best?
No. Upfront budget and the quantity you want also matter.
Can volume tell me the number of sprays?
Not precisely without measuring the device and use. There is no universal count.
Sources & references
This method is an editorial suggestion to adapt to your taste, budget and everyday life. It is not based on product tests or brand rankings.
